Dennison trained in medicine at the
University of Cambridge, and then completed a
PhD titled
Infant growth and bone loss in later life: a prospective study at the MRC Unit of the
University of Southampton in 1999. Dennison then undertook postdoctoral research at Southampton, and became a principal investigator on the Hertfordshire Cohort Study. She is Professor of Musculoskeletal Epidemiology and Honorary Consultant in Rheumatology within Medicine at Southampton. In 2011 Dennison joined the faculty of Victoria University of Wellington in 2011, being appointed as Professor of Clinical Research, and splits her time between the two countries. Dennison has served as Chair of the UK's
National Osteoporosis Society Grants Committee, and is a scientific advisor to the
International Osteoporosis Foundation Committee. She has chaired the British Society of Rheumatology Biologics Register Steering Committee. Dennison sits on a number of journal editorial boards, including
Osteoporosis International,
Calcified Tissue International,
Aging Clinical Experimental Research and the
Journal of Developmental Health and Adult Disease. == Honours and awards ==