Dr Robert Dunn graduated with the degrees M.B.,B.S. from Sydney University and then spent 2 years doing post graduate studies in the U.K.

On his return to Australia he settled into Liverpool in N.S.W. where he performed major surgery at both Public and Private Hospitals. He developed his General Practice there and subsequently became a Fellow of the Royal Australian College of General Practitioners in 1976. He developed an interest in allergic diseases and was an assistant Honorary Medical Officer in allergy at the Royal North Shore Hospital for about eight years.

Dr Dunn moved to Port Macquarie in 1984 and commenced the Flynns Beach Medical Centre where he practiced until he retired (temporarily) in 1994 when the Practice was ably taken over by Dr Graeme Lucas. He became boared with retirement and doing holiday relief work and rejoined the Flynns Beach Medical Centre in 1998.