 Formerly surgical registrar, Royal North Shore Hospital, 1980–81; general practitioner in Sydney 1982 -3; occupational physician, Sydney Water, 1983–1994; postgraduate student (Masters by thesis) 1994; medical officer, Department of Veteran Affairs, 1995; occupational physician, self-employed, at Pacific OHS, Burwood 1995–8.In 1994 he served as NSW President of the Doctors Reform Society of Australia, through which he argued for the continuation of Medicare and improvements to the public health system.Chesterfield-Evans was president of the Non-Smokers Movement from 1984 to 1997 and a member of Billboard Utilising Graffitists Against Unhealthy Promotions (BUGA UP), which vandalised tobacco-advertising billboards with satirical graffiti.