Simon Rosenbaum is a Professor at UNSW Sydney and Co-Lead of the NExuS research group (Nutrition, Exercise, and Social Equity) in the Discipline of Psychiatry and Mental Health. His work spans physical activity, mental health and trauma. He works across both community services in Australia and humanitarian response internationally, with an emphasis on scalable, trauma-informed approaches that bridge local and global mental health care. He has published more than 350 peer-reviewed papers, is a Clarivate Highly Cited Researcher (2019–24) and was named a 2024 NSW Young Tall Poppy. He is currently supported by an NHMRC Emerging Leadership 2 Fellowship (2023-27).

His leadership roles have included President of the Australasian Society for Traumatic Stress Studies (2021–2023), elected national director of Exercise and Sports Science Australia (2015-21), and inaugural Co-Chair of the Olympic Refuge Foundation’s Think Tank on sport and humanitarian settings (2020–23), a role he resumed in 2026.

He previously worked with the United Nations (IOM) as a community-based mental health and psychosocial support officer as part of the Rohingya refugee response in Cox's Bazar, Bangladesh (2019-20), and he has held visiting academic appointments in Bangladesh, Colombia, Italy and Mexico. Locally, he is the founder of Addi Moves, a free, trauma-informed movement facility, located at the Addison Road Community Organisation in Marrickville, Sydney.