Judge Diaz has been a director of Exelon since January 27, 2004. He serves on the risk oversight, energy delivery oversight and generation oversight committees. He joined Cozen O'Connor, a Philadelphia based law firm, as Of Counsel in May 2007. He was previously a partner of Blank Rome LLP (a law firm), from March 2004 through May 2007, and from February 1997 through December 2001. He served as the City Solicitor for the City of Philadelphia from December 2001 through January 2004, and Judge of the Court of Common Pleas, First Judicial District of Pennsylvania, from 1981 to 1993. He also served as General Counsel, United States Department of Housing and Urban Affairs, from 1993 to 1997. He also serves as a director of PECO Energy Company, an Exelon subsidiary.