Complex sentence: From 2002 to 2005, he was the Guy Raymond and Mildred Van Voorhis Jones Professor of Law at the University of Illinois College of Law, and from 2005 to 2007 the chief White House ethics lawyer in the George W. Bush administration from 2005--2007.
Split into simpler sentences: From 2002 to 2005, he was the Guy Raymond and Mildred Van Voorhis Jones Professor of Law at the University of Illinois College of Law. From 2005 to 2007, Painter was the chief White House ethics lawyer in the George W. Bush administration from 2005--2007.