Mr Young joined Exelon Power in March 2003 as chief operating officer and was named as its president in May 2003. In July 2004, he was appointed president of Exelon Generation, with responsibility for Exelon’s nuclear, power and power team businesses.

Mr Young was named executive vice president of finance and markets in March 2005 and appointed CFO in December 2005, with responsibility for Exelon’s financial organization and power team. Prior to joining Exelon, Mr Young worked for Sierra Pacific Resources, Southern Company and its operating units.

John Rowe, chairman, president and CEO of Exelon, said: John has played a critical role in helping Exelon deliver increasing value to our shareholders and customers. Though we are sorry to lose him, we congratulate John and wish him the very best. His drive and discipline will serve Energy Future Holdings well.