Tilghman Professor of English at University of Delaware
- Cornelius Tilghman Professor of English, Journalism and Environmental Humanities at the University of Delaware, where he has won the Excellence in Teaching Award
- Author for 30 years, including ContamiNation (Avery, 2016), Poison Spring (Bloomsbury, 2014), Food Fight: GMOs and the Future of the American Diet (Avery, January 2017), Bloody Falls of the Coppermine (Random House, 2005), and several others dating back to the 1990s.
- Former staff writer for the Atlanta Constitution
- Has contributed to Outside, Orion, The New Republic, and other publications
- Affiliated, Brown Memorial Presbyterian Church in Baltimore