Simon is an academic exercise physiologist focusing on physical activity and mental health, particularly populations exposed to trauma and social disadvantage. Simon is a Clarivate Highly Cited Researcher for Mental Health (2019-2023) and has published over >260 peer-reviewed publications, and delivered workshops in over 25 countries. He is the immediate-past President of the Australasian Society for Traumatic Stress Studies (ASTSS) and was the inaugural co-chair of the Olympic Refuge Foundation’s Think Tank on sport and humanitarian settings. He previously worked with the United Nations International Organisation for Migration as a community-based mental health and psychosocial support officer in the Rohingya refugee camps in Bangladesh. He has held visiting academic appointments in Colombia and Italy, and is currently supported by a National Health and Medical Research Council (NHMRC) Emerging Leadership Fellowship. Locally, Simon is the founder of ‘Addi Moves’, a free, trauma-informed, exercise facility for people experiencing trauma and social exclusion at the Addison Road Community Organisation in Marrickville, Sydney.