Organization Natural History Museum

Rare Breeds Survival Trust (founder member | 1973)

Journal of Zoology (editor and managing editor | 1994-2006)

British Army (WWII)

National Geography Society

Smithsonian Institution

Galerí a Arte El Dzunun, Guatemala, founder and member

Museo Ixchel Traje Indígena, Founder & member, President Board of Directors 1980-1985

Patronato Bellas Artes, President Folklorical Committee, Guatemala, 1983

Guatemalan Army