 He was elected as a member of the London Group in 1989, of the Colour Group (Great Britain) in 1996, and became a Fellow of the Royal Watercolour Society in 2004.He won a Hunting Art Prize in 1996, and won the Singer Friedlander National Watercolour Competition in 2001.Beginning in the 1960s, Whitaker held many one-man exhibitions over more than 40 years as a practitioner.