Humphrey is the proprietor of an organic citrus-growing and packing enterprise, and has a degree in Agricultural Science and a Diploma in Permaculture Design.
Humphrey’s family business has been growing fruit on the same land for over 100 years. The orchard began converting to organic management in 1994 and is certified organic with the National Association for Sustainable Agriculture Australia.
Humphrey has worked in salinity and water management in South Australia and been involved with a range of natural resource management organisations. Humphrey is currently a member of the Bookmark Creek Action Group and Chair of the Renmark Environmental Watering Committee.
Humphrey has been on the Trust Board since 1997 and was elected Presiding Member in 2019.