Prior to KeySpan, Mr Luterman served as senior vice president and CFO with Arrow Electronics, and also has held senior level financial positions with American Express, Emerson Electric and Booz-Allen & Hamilton. He is a director of Ramsey Industries, US Shipping Partners and Lutheran Medical Center.

Howard Cosgrove, chairman of NRG Energy, said: "With his executive experience within the energy sector and his insights into accounting and finance and other industry matters, Gerald will be a great asset to our board.

"The NRG board is comprised of directors with diverse backgrounds and highly useful experience in and around the electricity industry, and Gerald, with his financial expertise and his power experience, will be a very valuable addition to the board."

A service of YellowBrix, Inc.