Gary Cohen has decades of experience as, with his thirty years of experience, has been a formidable force in pioneering the environmental health movement. He is the Co-Founder and President of Health Care Without Harm and Practice Greenhealth. Both these organizations were established with the vision of transforming the healthcare sector into one that is environmentally sustainable, and acts as an anchor to support environmental health in communities, and becomes in a leader in the global movement for environmental health and justice. Gary was also a key figure in uniting NGOs and hospital systems to form the Healthier Hospitals Initiative, further highlighting his commitment to environmental health.

He has been instrumental in building global coalitions and networks to address the far-reaching impacts on environmental health, particularly those related to toxic chemical exposure and climate change. Throughout his career, Gary has been recognized for his unwavering dedication and innovative approaches to environmental health. His efforts have brought about significant awareness and initiated progressive steps to mitigate environmental health risks.