Willdan Group, Inc. (“Willdan”) (NASDAQ:WLDN), today announced that Thomas Brisbin, President and Chief Executive Officer, will give a presentation to investors at the Wedbush Securities Clean Technology and Industrial Growth Conference on Wednesday, September 15, 2010 at 3:30 p.m. Pacific Time. The conference will be held at The Fairmont San Francisco Hotel in San Francisco, California. Willdan invites investors and other interested parties to attend a live webcast of its presentation on Willdan’s website at www.willdan.com under Investors: Events. A replay of the presentation will be available on the website following the presentation. About Willdan Group, Inc. Founded over 40 years ago, Willdan is a provider of outsourced services to public and private agencies and utilities located primarily in California and New York. Willdan assists cities, public utilities and other government agencies and, to a lesser extent, private industry with a broad range of services, including civil engineering, building and safety services, geotechnical engineering, energy efficiency, water conservation, renewable resource strategy, financial and economic consulting, and disaster preparedness and homeland security. For additional information, visit Willdan’s website at www.willdan.com. Forward-Looking Statements Safe Harbor Statement: Statements in this press release which are not purely historical, including statements regarding Willdan’s intentions, hopes, beliefs, expectations, representations, projections, estimates, plans or predictions of the future are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The forward-looking statements involve risks and uncertainties including, but not limited to, the risk that Willdan will not be able to expand its services or meet the needs of customers in markets in which it operates. It is important to note that Willdan’s actual results could differ materially from those in any such forward-looking statements. Factors that could cause actual results to differ materially include, but are not limited to, a slowdown in the local and regional economies of the states where Willdan conducts business and the loss of or inability to hire additional qualified professionals. Willdan’s business could be affected by a number of other factors, including the risk factors listed from time to time in Willdan’s SEC reports including, but not limited to, the Form 10-K annual report for the year ended January 1, 2010 filed on March 30, 2010. Willdan cautions investors not to place undue reliance on the forward-looking statements contained in this press release. Willdan disclaims any obligation to, and does not undertake to, update or revise any forward-looking statements in this press release.