|He joined the Arboricultural Association in 1980 and was elected a Fellow in 1989. He was on their list of approved contractors while working as a contract manager for Southern Tree Surgeons and has been on their Register of Consultants since 1992. He is a Chartered Forester, Chartered Biologist and Chartered Environmentalist.
From 1993 he was an Arboricultural Inspecting Officer for Tree Preservation Order Appeals, retained by the Department of the Environment and its successors. In 2008 this was taken over by the Planning Inspectorate and he has continued as one of their Inspectors.
He is an Associate of Treework Environmental Practice, a multi disciplinary practice based near Bristol.
He contributed to Principles of Tree Hazard Assessment and Management by Dr David Lonsdale, published by DETR in 1999, and currently the leading work on this subject.
He is the Arboricultural Association�s representative on BSI Committee B/213 producing the current British Standards relating to trees including BS3998:2010 � Recommendations for Treework and BS5837:2012, Tree in Relation to design, demolition and construction and BS8545:2014 Trees: from nursery to independence in the landscape.