1942 - 1946 | Student Teacher, then Junior and Secondary Teacher with the Education Department of South Australia |
1943 - 1946 | Bachelor of Science with Honours (BSc (Hons)) completed at the University of Adelaide |
1947 - | Member of the ANZAAS (Australian and New Zealand Association for the Advancement of Science) |
1947 - | Member of the Royal Society of South Australia |
1947 | Grassland Ecologist on a survey of the South-East of South Australia with the Agronomy Department of the Waite Agricultural Research Institute |
1948 - 1949 | Botanist on the American-Australian Scientific Expedition to Arnhem Land in the Northern Territory |
1949 | Master of Science (MSc) completed at the University of Adelaide |
1949 - 1950 | Senior Research Fellow in Botany at the University of Adelaide |
1951 - 1952 | Councillor of the Royal Society of South Australia |
1951 - 1954 | Lecturer in Botany at the University of Adelaide |
1953 | Doctor of Philosophy (PhD) completed at the University of Adelaide |
1955 - 1960 | Senior Lecturer in Botany at the University of Adelaide |
1959 - 1960 | President of the Royal Society of South Australia |
1961 - | Member of the Royal Society of Victoria |
1961 | Verco Medal received from the Royal Society of South Australia |
1961 - 1965 | Reader in Plant Ecology at the University of Melbourne |
1964 | Acting-Head of the Department of Botany at the University of Melbourne |
1966 - | Professor of Botany at the University of Queensland |
1966 - 1978 | Head of the Department of Botany at the University of Queensland |
1967 - | Member of the of the Royal Society of Queensland |
1970 | Visiting Professor in the Department of Forestry at the University of Oxford, UK |
1974 - 1975 | Doctor of Science (DSc) received from the University of Adelaide |
1975 | Visiting Professor in the Department of Botany at the University of Leeds, UK |
1976 | Research Medal received from the Royal Society of Victoria |
1978 - 1984 | Member of the Scientific Advisory Committee of the World Wildlife Fund Australia |