 Constable is also the Chairman of the West Australian State Science Council, the Director of Ophthalmology Services for the WA Department of Health, a member of the State Facilities Council for Centres of Excellence, and a member of the State Health Research Advisory Council.Constable is also a consultant ophthalmologist to six Perth hospitals, including Royal Perth Hospital and Princess Margaret Hospital for Children.His clinical sub-specialties are vitreoretinal surgery, retinal vascular disease, diabetic retinopathy and macular degeneration

After secondary education at Shore School in Sydney, Constable graduated in medicine and surgery from the University in 1965.