Dr. Prakash Tyagi is the Executive Director of GRAVIS and Founder-Director of GRAVIS Hospital. In his academics, he has studied Medicine , Public Health and Geriatrics. He has also been the recipient of a Fulbright-Humphrey Fellowship to study global health at UNC Chapel Hill, received a Ford Fellowship to study non-profit management at Columbia University and has studied public policy through a Fleishman Fellowship at Duke University. He has supported various non-profits working on health and development aspects nationally and internationally. With his global health experience, he has contributed to various forums and has written extensively on major global health issues and priorities.

As the Executive Director of GRAVIS in India, he has been leading the organization since last 19 years. GRAVIS works extensively in the Thar Desert and other regions of India with key focuses on water security, food security and community health. GRAVIS reaches out to about 2.5 million people living in poverty with its work and has helped formation of over 4,000 Community Based Organizations.

Dr. Tyagi is an active development practitioner and public health professional with contributions in the fields of maternal and child health, geriatrics, HIV, TB and occupational health through his writing, research and field work. He is a part of several national and global development and health networks and initiatives and is a Clinical Professor at the School of Global Health of University of Washington, US and is in the Board of International Federation on Ageing.