Willdan Group provides professional, technical, and consulting services to utilities, government agencies, and private industry, addressing energy efficiency, infrastructure, and sustainability challenges through engineering, program management, software, and data analytics. The company operates two segments: Energy (85% of revenue), which delivers energy efficiency consulting, program design and implementation, and facility projects to utilities and commercial clients; and Engineering and Consulting (15% of revenue), which provides civil engineering, building and safety, planning, and financial advisory services to public agencies. Willdan generates revenue through time-and-materials, unit-based, and fixed-price contracts, serving a broad base of investor-owned and municipal utilities, state and local governments, and private enterprises across a nationwide network of offices.