Willdan Group, Inc. (NASDAQ:WLDN) announced today that it was selected by Mt. San Antonio College (Mt. SAC) in California to implement a $49 million energy services contract. The scope of work consists of the turnkey delivery of distributed energy resources (DERs) and infrastructure upgrades, including solar PV systems, a battery energy storage system, EV charging stations, and a comprehensive parking lot redesign. Construction is expected to be completed by the third quarter of 2027.

Willdan is listed as a qualified energy service company in the state of California and holds a Master Services Agreement with the Foundation for California Community Colleges to implement DERs at California Community Colleges – including Mt. SAC – as well as other public sector facilities.

"Sustainability is central to our mission and vision, guiding our students and staff while ensuring our campus can serve the community reliably for years to come," said Dr. Robert Hidalgo, Mt. SAC President of the Board of Trustees. "This project reflects those values by reducing energy use, adding resiliency through local energy generation and storage, and providing the flexibility to support a future microgrid and campus electrification."

About Mt. San Antonio College

Mt. San Antonio College is the largest single campus community college district of California's 116 community colleges, educating about 77,000 annually and serving the residents of nearly 20 communities at its Walnut campus. Since 1946, Mt. SAC has provided students from all walks of life with a full range of credit and noncredit programs to help them succeed in new careers, gain admission into top-tier universities, or advance in their current line of work. Learn more about Mt. SAC's 400 degree and certificate programs at https://www.mtsac.edu/.

About Willdan

Willdan is a nationwide provider of professional, technical, and consulting services to utilities, government agencies, and private industry. Willdan's service offerings span a broad set of complementary disciplines that include electric grid solutions, energy efficiency and sustainability, energy policy planning and advisory, engineering and planning, and municipal financial consulting. For additional information, visit Willdan's website at www.willdan.com or follow Willdan on LinkedIn and Facebook.

Forward-Looking Statements

Statements in this press release that are not purely historical are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. 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, the risk factors listed from time to time in Willdan's reports filed with the Securities and Exchange Commission, including, but not limited to, the Annual Report on Form 10-K filed for the year ended January 2, 2026. 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.

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Al Kaschalk

Vice President

310-922-5643

akaschalk@willdan.com

Willdan Selected by Mt. SAC for $49 Million Distributed Energy and Resiliency Project