Robert S. Rummell, who worked for the Agriculture Department’s Forest Service for 38 years, retiring in 1980 as an assistant director of range management, died Dec. 27 in an ambulance en route from the Carriage Hill Bethesda nursing facility to Suburban Hospital in Bethesda. He was 94.

The cause was congestive heart failure, his daughter Sherrie Rummell Kato said.

Mr. Rummell had worked since 1960 at the Forest Service’s Washington headquarters. Early in his career, he worked in range ecological and management research in Oregon, Washington state and Florida. He later specialized in the inventory, assessment and management of rangeland and participated in international meetings in Pakistan, Iran, Turkey, New Zealand and Australia.

Robert Sutherland Rummell was born in Cedar Rapids, Iowa. He received a bachelor’s degree in forestry in 1941 and a master’s degree in range management in 1942, both from Iowa State University.

He was a member of the Boy Scouts and attained the rank of Eagle Scout. His professional associations included the Society for Range Management and the Society of American Foresters. He published widely on forestry and other subjects and received numerous government honors, his daughter said. Mr. Rummell had lived in Bethesda for more than five decades.

His wife of 66 years, Thelma Bailey Rummell, died in 2012. His son, Douglas Rummell, died in 1973. Survivors include three daughters, Sherrie Rummell Kato of Ichinomiya, Japan, Patrice Rummell of Silver Spring and Cynthia Rummell of Bethesda.

— Emily Langer