Dr Jansen has worked as a Consultant Psychiatrist and team leader of multidisciplinary teams at Graylands Hospital, Osborne Clinic and Joondalup Community Mental Health Services, and currently at Mirrabooka Community Mental Health.

Dr Jansen has a full clinical load with direct clinical responsibly for patients with severe mental illness. In addition Dr Jansen is responsible for clinical governance, as Head of Clinical Service, at Mirrabooka, with leadership of Management Team and additional responsibilities of preparing Coronial reports, conducting Clinical Reviews, responding to complaints, compliments and Ministerial enquiries regarding clinical service.