AECOM

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Notice of 2024 Annual Meeting of Stockholders & Proxy StatementIntuit Dome United States

Our Purpose Delivering a Better World Our Vision We believe infrastructure creates opportunity for everyone— uplifting communities, improving access and sustaining our planet. By bringing together the best people, ideas and technical expertise, we partner with clients to turn their ambitions into action, and we embrace our core values—Deliver, Collaborate, Innovate, Sustain, Thrive and Safeguard—in everything we do.

Our Values We grow our business through relentless client focus, operational excellence and exceptional project execution. Deliver Collaborate Innovate We connect unrivaled expertise from around the world to anticipate and solve our clients’ most pressing challenges. We think without limits and embrace new ideas, shaping digital solutions to help clients address current and future challenges. Sustain Thrive Safeguard We take action to make a positive impact on the planet, enrich the communities we touch and build legacies for future generations. We build diverse teams, create an inclusive workplace and provide opportunities where each one of our people can reach their full potential. We operate ethically and with integrity, while prioritizing

In fiscal 2023, we celebrated anothermonumental year. Across each of ourstrategic and financial objectives, wemet or exceeded our target metrics.Our revenue growth continued toaccelerate, our design backlogachieved record levels, our win ratesare at or near all-time highs, and ourposition in the marketplace has neverbeen stronger.We owe this success to our incredible teams who are committed toproviding the best service to our clients and realizing our purposeof delivering a better world. As we continue to lead the industry,we recognize that our people are our most valuable asset. Theirtechnical expertise, agility, and teamwork set us apart and driveour innovation. And more importantly, we continue to look after ourcolleagues with safety performance that leads our industry.By honoring our commitments and through effectivecollaboration, we are successfully expanding our long-termcompetitive advantage and positioning AECOM as the best placefor our people in the industry.With our teams thinking and acting globally more than ever before,we achieved numerous milestones throughout the year, including:• By concentrating our capital and technical expertise on our fastestgrowingmarkets worldwide, we have attained a high win rate onthe most profitable opportunities. Our design business achievedrecord wins, and with a record backlog, we are poised for furthergrowth. By generating strong and consistent cash flow, we areable to invest in our workforce continuously, while also investing tocreate shareholder value.• Through the execution of our Think and Act Globally strategy,we brought the full power of our company to our pursuits andwon positions on some of the world’s most complex programs.Notable wins during the year included the Brent Spence BridgeCorridor project in the U.S., the Pure Water Southern Californiaprogram, multiple environmental contracts supporting the U.S.Navy, the Chemours green hydrogen facility expansion in France,transformative projects with NEOM in Saudi Arabia, the Tsing Yi–Lantau Link in Hong Kong, and Western Harbour Tunnel in Australia.In each of these marquee projects, our expanded addressablemarket in program management and advisory is providing a criticaladvantage.• We further invested in technical excellence and professionaldevelopment through award-winning learning programs andenhanced Career Paths resources. We are committed tosustaining this momentum in the upcoming year, includingthrough the launch of our latest Global Technical Academiescourses. Our own best-in-class experts develop these coursesand help ensure we continue to deliver the greatest possibleoutcomes for our clients around the world.• In an increasingly digital world, we advanced digital deliverythrough automated and computational design, deploying newproducts like Program Management’s Program Advance andexpanding our rapidly growing digital consulting business. Similarly,we enhanced global collaboration with our Enterprise Capabilitiesteams, expanding our capability to deliver more efficiently. Wewill continue to advance our digital strategy, aiming to create atruly differentiated client experience by leveraging products likePlanEngage™ and implementing our most advanced digital toolsand methods through Enterprise Capabilities.• We also took bold steps to embed sustainability and resilienceinto our work, establishing an industry-leading profile. Our ESGadvisory practice grew at a double-digit pace, with wins includinga sustainability component increasing nearly 300%. We solidifiedour position as the leader in helping our clients to decarbonize,transition to renewable and sustainable energy sources, enhancewater security, and invest in nature and biodiversity. Furthermore

I’m proud of the positive societal impact we made for thecommunities we serve. Internally, we achieved our near-term 20%gender diversity target for our leadership team and continued toprogress against our regional diversity targets while fostering anenvironment where all voices are respected and valued.• Refl ecting our focus on value creation, we allocated approximately$475 million of capital to shareholders through our quarterlydividend and share repurchase programs. In addition, we increasedour quarterly dividend by 22% in November, marking the secondyear of annual dividend increases of more than 20%, and increasedour share repurchase authorization to $1 billion. Our commitmentto value creation was further refl ected in our long-term fi nancialgrowth outlook we unveiled in December, which includes anexpectation for strong organic NSR growth, further marginexpansion, double-digit per share earnings growth, and continuedstrong free cash fl ow.As we look ahead, the strength of our company’s foundation isunparalleled—and with demand at unprecedented levels, theopportunities in our markets remain equally strong. With the besttechnical consultants in the industry, an aligned culture focusedon global collaboration, and our investments in the highestreturningmarkets, I remain confident the best days for AECOMare ahead of

us.We appreciate your continued support and look forward to anothersuccessful year.Troy RuddChief Executive Offi cerI am incredibly proud ofwhere our organization standstoday. Our consistently strongperformance is expanding ourcompetitive advantage and thelong-term earnings power of thebusiness to deliver growth intothe future.—Troy Rudd2024

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Think and ActGlobally Strategy We are at our best when we think and act globally. Launched in 2020, our strategy comprises four pillars that have positioned us for continued growth. Through developing our teams’ technical expertise, deepening our client relationships, transforming the way we work through technology anddigital platforms, and enhancing our position as a leading infrastructure and sustainability consulting company, the execution of our strategy is setting new standards for excellence in our industry.

Investing InOur PeopleWe are making AECOM the best placeto be in our industry—a place where youare welcomed, trusted, and empoweredto solve our clients’ most complexchallenges.DeliveringSustainableLegaciesWe are leading the change toward a moresustainable, resilient, and equitable futurethrough our own operational commitmentsand by helping our clients.Extending ClientRelationshipsWe are expanding our addressablemarket through our ProgramManagement global business line andadvisory expertise while focusingour technical experts on our highestreturning markets to deliver long-termprofitable growth.TransformingHow We WorkWe are deploying world-class technologyand digital innovations to deliver our worksignifi cantly faster and with even greateraccuracy, which improves the clientexperience and creates more fl exible waysof working.

AECOM is home to the industry's best technicalminds—approximately 52,000 technicaland business professionals who thrive in anenvironment that supports their learning andgrowth, encourages innovation, and celebratesgreat project and client outcomes.Our ability to deliver excellence and a high level of service to ourclients requires attracting and retaining the industry’s best talentand advancing our equity, diversity and inclusion objectives.We’ve made significant investments to support the learningand development of our people so they can build their skills andrewarding careers with us, provide competitive pay and benefits sothey can make the best choices for themselves and their families,and are building a culture of flexibility, trust, and performance sothey can be at their best.Delivering excellencethrough technical expertiseMarket trends, client needs, and delivery approaches are alwaysevolving, and clients depend on our strategic insight and advisorycapabilities—in addition to our technical expertise—to addresstheir challenges. To ensure our teams are project-ready, wecontinue to make investments in technical learning and professionaldevelopment programs that build and enhance technical skills,future-proof careers, help us exceed client expectations, andensure we stay ahead of industry trends.Building technical skills in AECOM’s Global TechnicalAcademiesAll employees are offered access to our proprietary GlobalTechnical Academies. With course content developed by our ownsubject matter experts, these academies provide our people withhigh-quality structured learning and development opportunitiesthat build knowledge and networks, extend technical skills, andfoster our culture of technical excellence and quality.· Buildings + Places Academy· Environment Academy· Global Program Management Academy· Sustainable Legacies Academy· Transportation Academy· Water AcademyBroadening the horizonsof our Technical PracticeNetworkThese development programs complement our global TechnicalPractice Network, the entry point to a world of technical experts,training, standards, templates, and other resources that connectour people and capabilities across regions and business linesvia 81 Technical Practice Groups, Tool Channels, and otherFunctional Groups.Throughout 2023, we commenced a process to better align ourTechnical Practice Groups with areas of business growth andlaunched consolidated, digital-focused groups supporting BuildingInformation Modeling, Data Science, and GIS.The vast majority of our people across all business lines and regionshave joined at least one Technical Practice Group, complementingadditional self-directed, personalized learning available via LinkedInLearning, Autodes, and Bentley through AECOM University and ourGlobal Technical Academies.

Scaling our professional development programsLeadership at All Levels is our full range of professionaldevelopment programs, offering both regional and globalexperiences. Designed to cultivate innovative thinkers, supportivemanagers, and effective leaders, the programs develop the skillsour employees need—tailored to each career level—to haveleadership skills and capabilities no matter where they are in theircareer journey.CEO Circle, our best-in-class learning experience designed forAECOM’s top strategic, operational, and technical leaders, wasrecognized with a gold medal for Best Advance in LeadershipDevelopment as part of the Brandon Hall Group’s HCM ExcellenceAwards. Participants in this program are selected to take part in ayearlong learning experience that includes in-person and virtualworkshops and coaching. Through CEO Circle, we are developingthe next generation of AECOM’s executive leadership.Leadership at all Levels Professional development programs that supportemployees throughout their careersA global program designed toprogress employees into trustedadvisors and develop anenterprise mindset.A global program focused onbuilding strategic, well-roundedleaders with a global perspectivefor all career paths.Early CareerRegional career development programsthat help participants establish corefoundations

of knowledge and keybusiness learnings to launch theircareers at AECOM.A series of programs and courses thatthe balance between delivering greatwork and supporting their teams.A premier learningexperience for the strongestdrivers of our business andclient development thatfeatures the Center forCreative Leadership as alearning partner.An award-winningexecutive leadershipdevelopment programdesigned to deliver a bestin-class learning experiencefor the next generation ofexecutives. Features WhartonExecutive Education as alearning partner.

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Creating a culture of flexibility,trust, performance, and well-beingFreedom to Grow is our work-life balance framework designedto support the balance and flexibility our people need to thriveand deliver their best for their team and clients. Employees andmanagers work together to evaluate work schedules and locationsto align on a flexible work arrangement that prioritizes workresponsibilities while supporting individual needs and includes atleast three days a week, or 60% of their schedule, working from anAECOM office or client site.Eligible employees in the U.S. and Canada also enjoy our FlexibleTime Off policy, which eliminates vacation accrual limitations,ensuring our people can take time off to support their needs andwell-being and be their best when at work.Flexibility at AECOM goes far beyond just when and where we work.We consider our holistic experience, respecting diversity in work,communication and thinking styles, and what makes each of ouremployees unique.This includes our culture of well-being, which helps safeguard ourpeople, clients, and communities. By being well, we bring our bestselves to everything we do personally and professionally. We arefocused on six pillars of well-being: emotional, financial, intellectual,physical, social, and for the planet.This year, in support of emotional well-being, we introduced a newglobal

Mental Health Allies network—dedicated AECOM colleagueswho are equipped with the language, tools, and knowledge to speakone-on-one with those who are facing a mental health challengeand connect them to resources that can help. Global Mental HealthAllies are specially trained by a Certified Mental Health First Aidinstructor to understand the signs and symptoms of mental healthchallenges and be w

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Fostering a welcoming andrespectful environmentWe are advancingeff orts globally infour key areas:Building diverse talentEnsuring, through our recruitmenteff orts, that our teams refl ect thediversity of the communities we servewith a focus on building leadershipaccountability, and partneringwith nonprofi t organizations anduniversities to build the talent pipelinefor the future.Expanding understandingExpanding understanding andempathy among employees throughemployee resource groups, ED&Ievents and celebrations, unconsciousbias training, and family-friendlybenefi t policies.Thinking without limitsThinking without limits by prioritizingsocial equity and impact in everyproject we pursue and in everyinnovative solution we deliver.Enriching communitiesEnriching communities through probono work, volunteerism, philanthropy,and strategic partnerships.Enterprisewide awards received by AECOM led by assessmentsand submissions in the Americas region include: the top score onthe Human Rights Campaign Foundation’s assessment of LGBTQ+workplace equality for the sixth consecutive year, the 2024Military Friendly Employer Friend award by Viqtory, and the 2024Diamond Award for Diversity, Equity, Inclusion, and Belonging by theAmerican Council of Engineering Companies of Pennsylvania.In Europe and India, we received our Silver level diversity andinclusion accreditation with The Clear Company, after our fi rstBronze designation received just last year. The Clear Company is arecognized Inclusion Standard that provides clarity and directionto continually improve our inclusive and fair work practices. Atthe Employers Network for Equality & Inclusion (enei) InclusivityExcellence Awards, AECOM won the Inclusive Culture Award andInfl uencer of the Year. The awards showcase organizations and theirachievements in promoting and progressing workplace diversity,equality, inclusion, and belonging.Accolades received in Asia include the Inclusive EnterpriseGold Award from Dream Come True Foundation in Hong Kong, inrecognition of companies employing young people with specialeducational needs and providing them with meaningful careerprospects. AECOM Hong Kong is also a key partner in the Inclusive100 initiative launched by the Dialogue in the Dark (HK) Foundation,which aims to promote inclusive workplaces that value people withvarying abilities.In Australia and New Zealand, weattained Bronze Tier Status from theAustralian Workplace Equality Index(AWEI), a national benchmark onLGBTQ+ workplace inclusion. AWEI comprises the largest and onlynational employee survey designed to gauge the overall impact ofinclusion initiatives on organizational culture as well as identifyingand nonidentifying employees. The Index drives best practicesin Australia and sets a comparative benchmark for Australianemployers across all sectors.2024 Proxy

Cultivating community and connectionOur Pride ERG does incredible work to develop tools andresources to educate and ensure the visibility of LGBTQ+ groupsand allies. This year for Pride Month in June, our Pride ERGchapters collaborated to create a one-of-a-kind, unifying eventthat truly represented how we Think and Act Globally. 24 hoursof Pride was a global event that consisted of informative andinteractive programming spanning across the Americas, Asia,Europe and India, and Australia and New Zealand. The wideranginglist of events included everything from trivia and DJ setsto insightful panels with LGBTQ+ colleagues and speakers tosessions for parents of LGBTQ+ children. It was an opportunityfor our employees to share stories, resources, and demonstrateallyship.We continue to encourage and support bonding and communitywithin AECOM. Employee resource groups (ERGs) help strengthenthe connections between us and the communities we serve. Theyprovide rich opportunities for the exchange of ideas and powerfuldialogue, professional networking and development, talentattraction, and philanthropic impact.In 2023, we launched two new global ERGs. Beyond Abilities, acommunity for the disabled, neurodiverse, and caregivers in theAmericas, and Europe, and India, that aims to foster a collaborativeand inclusive environment

to support people of all abilities, so theyare empowered to succeed at AECOM. Connect, a community forour early career professionals spanning the Americas, Europeand India, and Australia and New Zealand, that strives to cultivatean environment where insights from all levels of expertise can beconsidered. Our ERGs lead many cultural activities to help raiseawareness and understanding of what makes us unique and providean important platform and connection for our people.

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Celebrating, attracting, andretaining women in our industryOne of our key commitments to improve social outcomes across ourwork is to ensure our teams reflect the diversity of the clients andcommunities we serve. We continue to make progress on genderdiversity targets, including the achievement of our 20% target forwomen in leadership roles, while continuing to progress against our35% target for our overall workforce.To celebrate the women in our industry, we take part in InternationalWomen’s Day in March and International Day of Women inEngineering in June on a global scale. Our women colleagues arerecognized throughout the year, but we set these moments apart byshowcasing the incredible contributions made by our colleagues andthe career possibilities that are available here.

Over the past year, we have continued to take great strides toward ourambitions. We have continued to reduce our emissions footprint, particularlywithin our supply chain, that constitutes the majority of emissions. We alsocontinued to advance our ESG Advisory offering with our clients, includinga more than fourfold increase in the revenue generated from projects thatinclude an ESG-embedded service. In the year, we also achieved our near-termtarget of at least 20% women comprising our leadership, reflecting furtherprogress on our social value priorities.We have furthered our own carbon emissions goals by achievingoperational net zero beginning in fiscal 2021 while also committing toreach science-based net zero carbon emissions by 2040.Achieve net zerocarbon emissionsby 2040We believe diversity and inclusion enable better outcomes for clients, adeeper understanding of community challenges, and more innovativesolutions that propel the industry forward. As part of this pledge, wehave set an industry-leading, near-term target of women comprisingat least 20% of senior leadership roles and at least 35% of the overallworkforce. In addition, we have implemented new required unconsciousbias training and set specific targets within each of our regions toadvance our equity, diversity, and inclusion goals.Improve socialoutcomesWe introduced

ScopeX™, a first-of-its-kind approach with the goal ofsubstantially reducing carbon impact on major projects. We will alsoembed net zero, resilience, and social value targets into our clientaccount management program.Embed sustainabledevelopment andresilience acrossour workTo better assess ESG risk factors in potential projects, we havedeployed an enterprise framework supported by leadershipaccountability and advocacy through the audit of specific ESGtargets and metrics on an annual basis.

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Furthered ourcommitment tobiodiversity andnatureWe recognize that our focuson the environment cannotjust be limited to carbonemissions—we must beevaluating the impact of ouroperations and our clientwork on biodiversity andnature more holistically. Thatis why during fi scal 2023 weformalized a biodiversitystatement that has beensigned by our CEO, Troy Rudd,and includes commitmentsto support the GlobalBiodiversity Framework ofreversing nature loss by 2030.Furthermore, refl ecting ourcommitment to sustainabilityand leadership in advancingenvironmental stewardshipindustrywide, we wereawarded the Terra Carta Sealby the Sustainable MarketsInitiative in fi scal 2023.Advance our socialvalue initiativesWe believe that investing in localcommunities to create positivesocial and economic outcomes isat the heart of generating socialvalue. We work with our clients,partners, and suppliers to linkthe opportunities presentedby our projects to the needsof the local communities weoperate in, driving the creation ofpositive, lasting legacies. Socialvalue is critical to achieving ourSustainable Legacies strategyand making sure that no one isleft behind.In fi scal 2023, we continued toadvance our equity, diversity,and inclusion initiatives in ourcompany with the achievementof our near-term target of20% women in leadership.We also continue to makefurther progress againstour 35% near-term target ofwomen companywide whilealso advancing our nongenderdiversity targets within eachregion of our business.Continued to grow ourESG Advisory practicethrough technicalexcellence, includingour ScopeX™ processAs we continue to enhance thesustainability of our operations,we also continue to grow our ESGAdvisory practice to further embedsustainability and resilience into ourclient off ering. With unprecedenteddemand, we increasingly areintegrating sustainability services inour projects, with revenue generatedfrom projects with an ESG-embeddedservice up by more than four timesin fi scal 2023. Our leading technicalexpertise, combined with our ambitiousapproach to sustainability, is creatinga unique client value proposition thatis also contributing to record win ratesacross our business.One example of embeddingsustainability principles intoeverything we do is our ScopeX™approach, which considers materials,site locations, logistics, andconstruction methods to reduce andeliminate a project’s impact on thenatural environment. We minimizeenergy use, optimize sourcesof renewable power, and, wherefeasible, work with and enhancenatural habitats to eliminate carbonemissions. We believe that ScopeX™will be our biggest contribution to helpend the climate emergency.By decarbonizing the builtenvironment and supporting ourclients to achieve their net-zeroagendas, we’re striving to improve thecities and communities we serve anddeliver a better world.Promotingpositiveimpact in ourcommunitiesOur corporate responsibilityplatform is focused on deliveringaccess to safe and secureinfrastructure to those who needit most via strategic nonprofi tpartnerships, pro bono work,skills-based volunteering, andphilanthropy. In fi scal 2023, wecontinued to take a leading role inthe response to extreme eventsthat devastated communities.This was no more apparent than inthe aftermath of the Maui, Hawaiifi res, where we contributednearly $300,000 through anemployee-matched donationcampaign in collaborationwith the American Red Cross’sHawaii Wildfi res Relief Fund.Funds raised contributed toongoing assessment activities,distribution of relief supplies, andother important work.Our technical teams partner withnonprofi t organizations in theirlocal communities to providecritical design, engineering, andinfrastructure solutions, and wemaintain our relationship with ourenterprise strategic nonprofi tpartners—Engineers WithoutBorders and Water for People. InFY’23, our employees donatedmore than $80,000 USD to Waterfor People.

Reducing emissions towards our Science BasedTargets initiative-validated net zero targetsTo keep up with the latest best practices and climate science, we set a more ambitious 2040net zero target that was validated by the Science Based Targets initiative (SBTi) in 2022, makingAECOM one of the fi rst companies globally to achieve this at the time. As part of our updated, moreambitious net zero commitment, we are also targeting:90%Reducing all emissions90% by 2040(compared with 2018)60%Reducing Scope 1 and 2 emissions60% by 2030(compared with 2018)50%Reducing Scope 3 emissions50% by 2030(compared with 2018)Our global Scope 1 and 2 emissions,covering fl eet vehicles and offi ce energy,respectively, declined by 61% from our fi scal2018 baseline year as a result of key traveland real estate initiatives. We continue tomake progress against this commitmentin various ways, including by increasingthe effi ciency of our offi ce spaces, furtherextending sustainability guidelines for futureoffi ce refurbishments and relocations, andtransitioning our automotive fl eet to eithermore fuel effi cient or electric vehicles.Reducing our Scope 3 emissions meansfocusing on our supply chain emissionsand business travel. Our supply chainemissions have declined by 23%, includinga 65% reduction in business travel since2018. We are looking

to build on thisprogress through initiatives such as ourexpanded supplier engagement program,through which we are reaching out to thetop 80% of our suppliers by emissions tosupport them in setting targets and theirown decarbonization eff orts.Reducing all emissions 90% by 2040(compared with 2018) and off settingremaining emissions in 2040 through highqualitycarbon removal projects—achievingthis long-term reduction target will meanbuilding on the initiatives across Scopes 1, 2,and 3 as put in place for our 2030 targets.We also maintained our operational net zero status in 2023 and commit to maintaining operationalnet zero status annually. We achieved operational net zero through reduction of Scopes 1 and 2emissions in line with climate science and off setting remaining emissions.Scope2018 emissions(MtCO2e)2023 emissions(MtCO2e) % changeScope 1 33,718 23,745 - 30%Scope 2 104,307 30,113-71%Scope 3—Supply Chain (Purchased Goods & Services, Capital Goods) 2,740,482 2,214,243-19%Scope 3—business travel 158,182 56,032-65%Total 3,036,689 2,324,133-23%

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Leading by example:Advising on the energy transitionWith our own industry-leading sustainability journey to guide us,we're helping organizations protect the environment, enhancecommunities, integrate sustainable development into everydaybusiness, and improve governance.These ambitions look different for every organization and industry,so we help clients understand where they are in the energy transitioncontinuum and then develop a tailored roadmap with tangible nextsteps so they can build momentum to achieve their goals.We're advancing our leading advisory position by partneringwith clients to navigate and accelerate their energy transition.Our flagship global thought leadership report, The Future ofInfrastructure, Lost in Transition? is driving these conversations.Based on qualitative and quantitative research carried out withnearly 850 senior executives spanning nine industries and 22countries, it provides our clients and the broader industry withpractical, profitable, predictable, and people-centric strategies toachieve net zero.COP28As the sustainability consultant for the 28th UNFCC Conferenceof Parties (COP28) in the United Arab Emirates (UAE), we played apivotal role in shaping a leading sustainability and environmentalmanagement strategy, guiding the event toward carbonneutrality. Our comprehensive approach established frameworks,management guidelines, and carbon management plans, integratingsustainability processes and carbon-tracking tools into the event.Our role extended beyond COP28 itself, creating the foundation forsustainable operations in future COPs and elevating sustainabilitystandards within the UAE’s event sector.Leveraging our UAE-based environmental consultants and globalnetwork of experts, we provided advisory services to attain ISO20121 certification for sustainable events and supported theimplementation of operational sustainability throughout the event’ssupply chain. Following the event, there’s a tremendous amount ofwork to do to move us from ambition to action. Initiatives like thenear-zero emissions building breakthrough highlight the value ofCOP28, but also that we must now take steps to operationalize.With our technical expertise, knowledge of the increasinglymultifaceted energy infrastructure landscape, plus implementationexperience of new and coming technologies, AECOM is wellpositioned to advise on and help drive this transformative change.Powering New York with offshore windIn line with our client, Equinor’s commitment to cleaner energy forNew York, the Beacon Wind project was carefully crafted with astrategic approach. Our role centers on environmental permittingand engineering for the offshore lease area, covering 128,000acres south of Nantucket, MA. This area is integral to Equinor’sportfolio, including Empire Wind 1, Empire Wind 2, and BeaconWind 1, collectively aiming to provide 3.3 gigawatts of electricityto New York.Community engagement is vital, involving Indigenous nations,stakeholders, and local fishing communities to assess and minimizethe project’s impact on the local economy. Working closely withthe Bureau of Ocean Energy Management (BOEM) and the NationalOceanic and Atmospheric Administration (NOAA), we are obtainingapprovals for the site assessment plan (SAP) and conductingessential surveys and studies.Our team conducts in-depth research to design alternativesubmarine cable routing options, considering cost, schedule, andenvironmental factors. Beacon Wind, set to be operational in 2028,signifies a massive investment in sustainable energy, solidifyingNew York’s position as a hub for wind-powered renewable energy.

SafetySafeguarding our people remains a core value atAECOM. Fostering a Culture of Caring based on equity,diversity, and inclusion—where communication,collaboration, and consultation enable ownership forthe well-being of individuals and others—continued tobe a critical focus in fiscal 2023.We are committed to maintaining the physical, psychological,and social well-being of our employees, stakeholders, andglobal communities through appropriate risk managementstrategies. Our Culture of Caring and Safety for Life programsenable us to identify, manage, and eliminate hazards andreduce risk in our workplaces proactively and aggressively.These incident prevention efforts have continued to result insuccessfully meeting annually established leading and laggingkey indicator targets, our Core Value Metrics, for both theAECOM Enterprise and all associated business groups, withour incident rates remaining superior to industry average.Within fiscal year 2023, our Total Recordable Incident Rate(TRIR) in our Professional Services businesses reflect animprovement of 45% since fiscal 2020, while our Lost WorkdayCase Rate (LWCR) improved by 67% over the same period.We apply the U.S. Occupational Safety and HealthAdministration (OSHA) recordable injury and illness definition toour global operations, allowing for a standard record-keepingapproach

across all regions. Our metrics include injury andillness incidents associated with our employees and do notinclude contractor data.TRIR = total number of recordable incidents x 200,000 hoursTotal hours workedLWCR = total number of lost time incidents x 200,000 hoursTotal hours worked

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AECOM’s Safety for Life program, driven byleadership commitment and empoweredemployees, has been fundamental todelivering industry-leading performanceand recognition by clients and agenciesaround the world. A key example of this wasAECOM’s Royal Society for the Preventionof Accidents (RoSPA) President’s Awardfor having achieved 14 consecutive annualGold Awards. Our culture’s impact was alsorecognized by the United States OccupationalSafety and Health Administration (OSHA), withour AECOM Turner NBA Joint Venture IntuitDome project awarded Voluntary ProtectionPrograms (VPP) Star status.The previous year highlighted programsto support exercising both collectiveand individual care, including our “Take aMoment” focus, driven globally throughfi rst-person video accounts shared by ourpeople. “Take a Moment” emphasizes thecritical importance of exercising mindfulnessbefore acting and pre-planning to producesafe work environments, while continuingto empower employees to “Stop Work” inunsafe conditions. The power of our Cultureof Caring was also highlighted with AECOM’scelebration of International Women inEngineering Day. Our women engineerspublished testimonials sharing how they makesafety seen as they execute AECOM’s Safetyfor Life program in their work.Over the course of FY2023 our Global Safety,Health and Environment (SH&E) teams alsocollaborated to improve the accessibilityof employee resources and tools. Oneexample is the execution of a new innovativeGlobal SH&E Lessons Learned repository.This digital tool provides easy accessand searchability of lessons learned fromall regions and business lines, extendingthe reach of incident prevention eff orts.These represent only a few examples of theeff orts that contribute to our continuousimprovement successes and furtherstrengthen our Safety for Life program.Global Security and ResilienceLeveraging deep industry experienceand insight, and the strength of evolvingsecurity technologies and processes,AECOM’s Global Security and Resilience(GSR) team provides our global operationswith the professional knowledge andawareness needed to eliminate or minimizethreats to our personnel and operations.The GSR team expertise has proactivelysupported proper project planning toeff ectively manage applicable security risksand, thereafter supports execution acrossour operations. From advising on situationalawareness on-site, in the offi ce or while,to—in more extreme cases—helping ourpeople when they fi nd themselves strandedin locations due to extreme weather orother dangerous geopolitical events, ourGSR team has been critical to our businesscontinuity. While continuing to supportoperations in high- and elevated-riskcountries, our team also actively identifi esand manages security risks with highpotential in low-risk countries. Maintainingthe security of our personnel and ouroperations is crucial and a critical elementof our core value, Safeguard.

Data securityWe understand the evolving landscape of cybersecurity threats, andwe constantly invest in measures to safeguard data from unauthorizedaccess, cyberattacks, phishing, and other malicious activities.We prioritize data security through a comprehensive InformationSecurity Program aligned with industry standards like ISO 27001,NIST CSF, and NIST 800-53. This program safeguards yourinformation against unauthorized access, alteration, disclosure, ordestruction.Ethics and complianceWe believe good ethics is good business. We are committed to alwaysprioritizing ethics and integrity, not simply because it’s the rightthing to do, but also because it helps safeguard our people and ourcompany from potential wrongdoing while strengthening our brandand reputation around the world.Our Code of Conduct outlines the legal guidelines we must follow andgeneral ethical principles to help each of us make the right decisionswhen conducting business worldwide. Leaders at the companypromote ethical behavior through a global ethics committee as wellas through regional ethics committees. Our employees take partin annual Code of Conduct training, which received 100 percentcompletion in fiscal 2023. We also provide supplemental training onethics and compliance issues throughout the year and incorporateethics and compliance

principles in our training for new employeesand new managers.Furthermore, we have a comprehensive cross-functional ethics andcompliance program focused on preventing issues from occurring,detecting them if they happen, effectively and expediently resolvingissues, and capturing and communicating lessons learned to preventthem from repeating. As a result, we have been recognized seventimes by Ethisphere as a World’s Most Ethical Company.Human rights commitmentAECOM is a signatory to the U.N. Global Compact and adheres to the International Bill of Rights and International Labor Organization’sDeclaration of Fundamental Principles and Rights at Work, which underscores our commitment to abiding by and promoting internationalhuman rights. AECOM’s Human Rights Statement and Modern Slavery Act Statement provide more detail on our policies and commitmentsrelated to ensuring fundamental rights at work, such as reasonable working conditions and wages, the right to collective bargaining, andcombatting human rights abuses, such as modern slavery and child labor.

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Regulation G informationReconciliation of NSR(in millions)Twelve Months EndedSep 30, 2022 Sep 30, 2023AmericasRevenue $9,939.3 $10,975.7Less: Pass-through revenue 6,228.2 7,056.8Net service revenue $3,711.1 $3,918.9InternationalRevenue $3,206.7 $3,402.1Less: Pass-through revenue 609.0 619.0Net service revenue $2,597.7 $2,783.1Segment Performance (excludes ACAP)Revenue $13,146.0 $14,377.8Less: Pass-through revenue 6,837.2 7,675.8Net service revenue $6,308.8 $6,702.0ConsolidatedRevenue $13,148.2 $14,378.5Less: Pass-through revenue 6,837.2 7,675.8Net service revenue $6,311.0 $6,702.7Reconciliation of adjusted operating income(in millions)Twelve Months EndedSep 30, 2022 Sep 30, 2023Americas Segment:Income from operations $653.8 $714.6Amortization of intangible assets 17.4 17.3Adjusted income from operations $671.2 $731.9International Segment:Income from operations $221.2 $254.7Amortization of intangible assets 1.4 1.2Adjusted income from operations $222.6 $255.9Segment Performance (excludes ACAP)Income from operations $875.0 $969.3Amortization of intangible assets 18.8 18.5Adjusted income from operations $893.8 $987.8Reconciliation of adjusted EPSTwelve Months EndedSep 30, 2022 Sep 30, 2023Net income attributable to AECOM fromcontinuing operations—per

diluted share(2) $2.73 $0.81Per diluted share adjustments:Noncore AECOM Capital (income) loss,net of NCI (0.10) 2.26Restructuring costs 0.75 1.34Amortization of intangible assets 0.13 0.13Financing charges in interest expense 0.03 0.03Tax effect of the above adjustments(1) (0.14) (1.01)Valuation allowances andother tax only items — 0.15Adjusted net income attributable toAECOM from continuing operationsper diluted share $3.40 $3.71Reconciliation of adjusted EBITDA(in millions)Twelve Months EndedSep 30, 2022 Sep 30, 2023Net income (loss) attributable to AECOMfrom continuing operations $389.1 $114.1Income tax expense (benefit) 136.1 56.1Depreciation and amortization 170.2 175.1Interest income (8.2) (40.3)Interest expense 110.3 159.4Amortized bank fees includedin interest expense (4.8) (4.8)EBITDA $792.7 $459.6Noncore AECOM Capital (income) loss,net of NCI (13.9) 315.8Restructuring costs 107.6 188.5Adjusted EBITDA $886.4 $963.9Reconciliation of net cash provided byoperating activities to free cash flow(in millions)Twelve Months EndedSep 30, 2022 Sep 30, 2023Net cash provided by operating activities $713.7 $696.0Capital expenditures, net (128.1) (105.3)Free cash flow $585.6 $590.7

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Dear AECOM Stockholder:

You are cordially invited to attend the 2024 Annual Meeting of Stockholders (the “2024 Annual Meeting”) of AECOM, which will be held on Tuesday, March 19, 2024, at 1:00 p.m. Central Time.

The 2024 Annual Meeting will be a completely virtual meeting, conducted via live webcast. The virtual meeting format allows all of our stockholders the opportunity to participate in the annual meeting no matter where they are located. You will be able to attend the annual meeting, vote, and submit questions during the meeting by visiting www.meetnow.global/M776YJP. Further information regarding attendance, including how to access the virtual meeting, is set forth in the “Attending the Virtual Annual Meeting” section of the attached Proxy Statement.

Details of the business to be conducted at the 2024 Annual Meeting are given in the attached Notice of Annual Meeting of Stockholders and the attached Proxy Statement.

Whether or not you plan to attend the 2024 Annual Meeting, it is important that your shares be represented. The attached Proxy Statement contains details about how you may vote your shares.

Sincerely,

Troy Rudd

Chief Executive Officer

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

TO BE HELD ON MARCH 19, 2024

The 2024 Annual Meeting of Stockholders (the “2024 Annual Meeting”) of AECOM (the “Company,” “our” or “we”) will be held on Tuesday, March 19, 2024, at 1:00 p.m. Central Time, virtually by live webcast. You will be able to attend the annual meeting, vote, and submit questions during the meeting by visiting www.meetnow.global/M776YJP. At the 2024 Annual Meeting, you will be asked to:

Elect each of the 9 director nominees named in the Proxy Statement accompanying this notice to the Company’s Board of Directors to serve until the Company’s 2025 Annual Meeting of Stockholders.

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The Board of Directors recommends that you vote FOR each of the director nominees.

Ratify the selection of Ernst & Young LLP as our independent registered public accounting firm for fiscal year 2024.

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The Board of Directors recommends that you vote FOR the ratification of the selection of Ernst & Young LLP.

Vote to approve the Company’s executive compensation, on an advisory basis.

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The Board of Directors recommends that you vote FOR the Company’s executive compensation on an advisory basis.

We will also attend to any other business properly presented at the 2024 Annual Meeting. The foregoing items of business are more fully described in the Proxy Statement that is attached to, and a part of, this notice.

Only common stockholders of record at the close of business on January 19, 2024 can vote at the 2024 Annual Meeting or any adjournment or postponement thereof. A complete list of such stockholders will be open to the examination of any stockholder for a purpose germane to the meeting for a period of ten days ending on the day before the Annual Meeting at the Company’s principal place of business, located at 13355 Noel Road, Suite 400, Dallas, Texas 75240. The Annual Meeting may be continued or adjourned from time to time without notice other than by announcement at the Annual Meeting.

By order of the Board of Directors,

Manav Kumar

Corporate Secretary

Dallas, Texas

January 29, 2024