Intern (Medicine), Toronto General Hospital, 1974- 1975
Assistant Resident (Medicine), Toronto General Hospital, 1975- 1976
Assistant Resident (Neurology), New York Hospital, 1976- 1978
Chief Resident (Neurology), New York Hospital, 1978- 1979
Research Fellow (Cancer Biology), Sloan Kettering Institute for Cancer Research, 1979- 1981
Clinical Fellow (Neuro- Oncology), Memorial Hospital for Cancer & Allied Diseases, 1979- 1981
Professional Leadership Program, Faculty of Medicine, University of Western Ontario, 1997
Chief, Department of Clinical Neurological Sciences, Victoria Hospital, London, Ontario, 1993-1996
Head, Division of Neurology, Clinical Neurological Sciences, University of Western Ontario, 1996-1998
Chief Executive Officer, London Regional Cancer Centre, London, Ontario, 1998-2002
Vice President, Cancer Care Ontario - Southwest Region, 1998-2002
Chair, Department of Oncology, University of Western Ontario, 1998-2002
Head, Department of Clinical Neurosciences, University of Calgary, 2002-2012
Department Head, Clinical Neurosciences, Alberta Health Services - Calgary Zone, 2002-2012
Director, Arnie Charbonneau Cancer Institute, University of Calgary, 2013-present
Interim Medical Director, Tom Baker Cancer Centre, Alberta Health Services, 2019-2020
Interim Head, Department of Oncology, University of Calgary, 2019-2020
Instructor (Neurology), Cornell University Medical College, 1979- 1981
Assistant Professor (Neurology), Cornell University Medical College, 1981- 1982
Assistant Professor (Oncology), University of Western Ontario, 1982- 1987
Associate Professor (Oncology), University of Western Ontario, 1987- 1991
Professor (Oncology), University of Western Ontario, 1991-2004
Professor (Clinical Neurosciences), University of Calgary, 2002-present
Attending Neurologist, New York Hospital, 1981- 1982
Attending Neurologist, Memorial Sloan Kettering Cancer Center, 1981- 1982
Attending Neurologist, London Regional Cancer Centre, 1982-2002
Attending Neurologist, London Health Science Centre, 1982-2002
Consultant Neurologist, St. Joseph's Health Centre, 1984-2002
Attending Neurologist, Foothills Medical Centre, 2002-present
Consultant Neurologist, Tom Baker Cancer Centre, 2002-present