University of Wisconsin–Platteville.
From 1991 to 1993 he represented the 16th District of Illinois (map). He was then educated at the John Marshall Law School in Chicago, and was the Jo Daviess County, Illinois State"s Attorney and prosecutor, as well as a lawyer in private practice before entering the House. That part of Northern Illinois had not sent a Democrat to the House since the creation of the district.
He was defeated for reelection by Don Manzullo, who held the seat until his defeat by fellow Republican Congressman Adam Kinzinger for re-nomination in the 2012 Republican primary election held on March 20, 2012, after the decennial re-districting.
Following his term, Cox returned to Galena, Illinois where he continued his private law practice. Since returning to Galena, Cox has also served as City Attorney for the City of Galena, Illinois.
Currently Cox is Vice President for External Affairs and General Counsel for Jo-Carroll Energy, Incorporated. (NFP), an Illinois energy cooperative.