Organization Field Studies Council

British Lichen Society (treasurer | council member | president | 1992-1994)

Twickenham College of Technology (photographic consultative committee)

London College of Printing (photographic consultative committee)

King's College, University of London

Royal Geographical Society

Institute of British Geographers

British Association for the Advancement of Science

Birkbeck College, University of London

Geological Society of London

Society of Wildlife Artists (cofounder)

Slapton Ley field centre (1959-1968)

St Luke’s College, Exeter (teacher)

Malham Tarn field centre (warden)

Devon County Council (conservation officer | 1971-1973)

Dartmoor National Park (national park officer | 1973-1990)

Devon Wildlife Trust

Devonshire Association

Countryside Council for Wales (chief executive | 1990-1995)

Association of National Park Authorities (secretary general | 1996-2001)

Royal Entomological Society of London

Royal Society for the Protection of Birds (Symond's Yat)