Organization University College of the Gold Coast

University of Melbourne (senior lecturer of botany | 1948-1952)

University of Reading (professor of agricultural botany | 1954-1956)

Commonwealth Scientific and Industrial Research Organisation (research scientist | 1956-1967 | 1974-1979)

University of California (professor of biology | 1967-1968)

Utah State University (professor of systems ecology | 1968-1974)

Edith Cowan University (honorary research associate | Centre for Ecosystem Management)

Ecosystems of the World (editor-in-chief)

Exit International (member)