Dan has served as Director of the Gibson D. Lewis Health Science Library at the University of North Texas Health Science Center since September of 2009 and Director of the regional office of the National Library of Medicine (Regional Medical Library, South Central Region, National Network of Libraries of Medicine) since May of 2016.  Prior to coming to Fort Worth, Dan held librarian positions at the University of Illinois at Urbana-Champaign and Oklahoma State University in Stillwater and served as an intelligence analyst for the United States Army.