Willdan Group, Inc., together with its subsidiaries, provides professional, technical, and consulting services through engineering, program management, policy advisory, and software and data analytics primarily in the United States. The company operates in two segments: Energy, and Engineering and Consulting. The Energy segment offers comprehensive audit and surveys, program design and implementation, master planning, demand reduction, grid optimization, benchmarking analyses, design engineering, AI data center power solutions, construction management, performance contracting, installation, alternative financing, measurement and verification services, and software and data analytics, as well as energy consulting and engineering, turnkey facility and infrastructure projects, and customer su…