Erin O'Connell-Diaz was appointed Commissioner of the Illinois Commerce Commission (ICC) in 2003 and reappointed to a second term
on the ICC in 2008. She serves as Chair of NARUC's Electricity Committee and is a member of its Board of Directors. She also is active
on the Committees on Water, Utility Marketplace Access, International Relations and Critical Infrastructure. She also serves on
the EPRI Advisory Council, NARUC's Rate School Faculty and the Advisory Board of NARUC's Critical Consumer Issues Forum. She is also
a member of the Harvard Electric Policy Group and served as a Vice-Chair of the NARUC Joint Subcommittee on Environmental Policy and Practice.
In her professional career she served as an Illinois Assistant Attorney General–General Law Division (1983-1991), Illinois Commerce Commission
Administrative Law Judge (1991-2003), and Assistant Director-Administrative Law Division. In her home community she is a Trustee and Board
member of the Bull Valley Association, Past Chair of the Chicago Bar Association's Public Utility Law Division and has been on the
Board of Trustees-Regina Dominican High School and is a lifetime member of the Naval Reserve Association. Commissioner O'Connell-Diaz
graduated from St. Mary's College of Notre Dame-Cum Laude (BS History-Government), and received her J.D. from Loyola University School of Law.