Dr Witcombe graduated from the University of WA in 1989. After her internship and residency at Royal Perth Hospital, Dr Witcombe did her basic GP training term in George Town, Tasmania followed by 6 months of paediatrics at PMH and 12 months in the UK achieving a Diploma of Anaesthetics. In 1993 she returned to WA to complete her Diploma of Obstetrics at OPH, and then her rural GP training in Kalgoorlie, where she practiced procedural obstetrics and anaesthetics, delivering up to 150 babies a year, and obtained her Fellowship of General Practice.
After meeting, and later marrying, Dr Stuart Paterson at a rural medicine conference in Kalgoorlie, she moved to the Perth Hills, continuing to practice public and private obstetrics at Swan Districts and Kalamunda Hospitals, whilst working at Greenmount and Darlington Medical Centres, raising their young family and completing a 2 year Graduate Diploma of Applied Science in Nutritional and Environmental Science from Swinburne University.
Dr Witcombe and Dr Paterson moved to Fremantle in 2002, Dr Witcombe working initially at Hampton Medical Centre, then Ellen St Family Practice from its inception in 2003, with Dr Paterson joining the team in 2011. Dr Witcombe has also worked for the RFDS Rural Women Doctors Program in Wagin, at GPAH Mt Lawley and Murdoch, and was involved in the Australian Primary Care Collaboratives program. She currently works part-time for the Health Department as a perinatal mortality investigator.
Dr Witcombe has two teenaged children whom she adores. She also enjoys walking, reading, and travelling with her family. In recent years they have travelled in Ireland, Egypt, Italy, Turkey and Japan. She is a member of Doctors for the Environment, Amnesty, Oxfam, The Greens and Greenpeace. She is also a bit of a history documentary tragic. She loves the village atmosphere of Fremantle and the community atmosphere at Ellen Health.