 ANAHEIM, Calif.--BUSINESS WIRE--- WLDN--Willdan Group, Inc. NASDAQ: WLDN announced today that Pacific Gas and Electric Company PGE has awarded a new energy efficiency program to Willdan that serves K-12 public schools and both local and federal government buildings. The four-and-a-half-year, 10 million contract is one of PGEs first programs to include both energy efficiency and integrated demand-side management IDSM in a single customer offering. The contract has a pay-for-performan 