United States securities and exchange commission logo March 25, 2021 Stacy McLaughlin Chief Financial Officer and Vice President Willdan Group, Inc. 2401 East Katella Avenue, Suite 300 Anaheim, CA 92806 Re: Willdan Group, Inc. Registration Statement on Form S-3 Filed March 19, 2021 File No. 333-254483 Dear Ms. McLaughlin: This is to advise you that we have not reviewed and will not review your registration statement. Please refer to Rules 460 and 461 regarding requests for acceleration. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. Please contact Nicholas Lamparski at (202) 551-4695 with any questions. Sincerely, Division of Corporation Finance Office of Trade & Services cc: John-Paul Motley