Willdan Group, Inc.

We maintain disclosure controls and procedures, as defined in Rule 13a-15(e) and Rule 15-d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as controls and other procedures that are designed to ensure that information required to be disclosed by the issuer in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed in the reports that we file or submit under the Securities Exchange Act is accumulated and communicated to our management, including our including our President and Chief Executive Officer, Michael A. Bieber, and our Chief Financial Officer and Executive Vice President, Creighton K. Early, as appropriate to allow timely decisions regarding required disclosure.

In connection with the preparation of this Quarterly Report, an evaluation was performed under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, of the effectiveness of our disclosure controls and procedures as of October 3, 2025. Based on that evaluation, our principal executive officer and principal financial officer concluded that our disclosure controls and procedures were effective, at a reasonable assurance level, as of October 3, 2025.

On January 31, 2025, and March 3, 2025, we completed the acquisition of Alpha, and APG, respectively. Prior to the acquisition, Alpha, and APG were privately-held companies and were not subject to the Sarbanes-Oxley Act of 2002, the rules and regulations of the SEC, or other corporate governance requirements applicable to public reporting companies. As part of our ongoing integration activities, we are continuing to incorporate our controls and procedures into Alpha, and APG, and, if needed, to augment our company-wide controls to reflect the risks that may be inherent in the acquisition of these privately-held companies.

Other than our integration of Alpha, and APG, there have been no changes in our internal control over financial reporting during the quarter ended October 3, 2025, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.