Jeffrey D. Butler, former senior vice president in charge of energy delivery at Pacific Gas and Electric Co., is to come out of retirement to become Connecticut Light & Power Company’s president and chief operating officer when Ray Necci retires at the end of this month.

Necci has been with Northeast Utilities, CL&P’s parent company, for 33 years and became president of CL&P in 2005.

Butler, a Registered Professional Engineer with a Bachelor of Science degree in electrical and electronic engineering from California State University, Chico, has extensive utility experience including leading energy delivery, transmission and distribution, operations, maintenance, construction, customer field services, and metering activities at PG&E.

“Jeff brings 27 years of effective utility leadership and management experience to this position,” said Charles W. Shivery, chairman, president and chief executive officer of NU, in a statement. “As we continue to evolve as an energy solutions provider for our customers and the region, Jeff’s leadership will play a critical role in delivering operational excellence and a positive experience for our CL&P customers.”

Butler will report to Lee Olivier, who is CL&P’s chief executive officer and NU’s executive vice president and chief operating officer.

CL&P serves 1.2 million customers in 149 Connecticut cities and towns.