Roger earned his PhD in botany at the University of Montana in 1984.
He retired from a 35 year career as the Idaho Bureau of Land Management state botanist 7 years ago, but continues to serve on graduate faculty committees at Idaho universities and Utah State University. Roger has been a member of the NRCS Riparian Plant Improvement Advisory Committee, the International Forest Health Monitoring Program, a USAID forest health team in Lebanon, and on the President’s Forest Ecosystem Management Assessment Team (FEMAT). He has authored nearly 100 scientific publications and is an author/co-author of six botanical reference books. He has worked on the biology and conservation of several federal and state listed endangered and threatened plant and animal species. In 2008, he received the Idaho Weed Hall of Fame Award. In his spare time, Roger is an avid kayaker and naturalist.