Caleb Dorr fellow University of Minnesota, 1932-1934. Technician Intermountain Forest Experiment Station, 1934-1935. Junior forester Southern Forest Experiment Station, New Orleans, 1935-1936.
Assistant forester, then associate forester Intermountain Forest and Range Experiment Station, Ogden, Utah, 1936-1940. Forester, then senior forester Beltsville (Maryland.) Forest Laboratory, 1940-1945. Officer-in-charge Gulfcoast branch Southern Forest Experiment Station, 1945-1951.
Professor forest management School Forestry, North Carolina State University, 1951-1954, Carl Alwin Schenck professor forest management, 1954-1980, head department forest management, 1958-1970, also member administrative board Graduate School. Fulbright research scholar U. Helsinki (Finland), 1965-1966. Visiting lecturer Royal College Forestry, Stockholm, Sweden, Forest Research Institute, Vollebekk, Norway, U. Aberdeen (Scotland), U. College N. Wales, Bangor, 1966.
Consultant to industry, 1956-1965, 67-80, Food and Agriculture Organization (of the United Nations), 1966. Director National Science Foundation-Undergrad. Research participation programs in forest biology, 1960-1964, 67-70.
Fellow Society American Foresters (chairman Appalachian section 1957-1958). Member Society Forestry Finland (honorary), Soil Science Society American (vice chairman division 7 1967-1970, chairman 1970-1971), International Soil Science Society, North Carolina Academy Science, Sigma Xi, Gamma Sigma Delta, Xi Sigma Pi, Alpha Zeta, Phi Kappa Phi.