Chapal is a Technical Officer for the World Health Organization's (WHO) Disability and Rehabilitation Team (DAR) in the Department of Violence and Injury Prevention and Disability (VIP). His responsibilities include promoting community-based rehabilitation and assistive devices (especially prosthetics and orthotics devices). Chapal started a nongovernmental organization called Mobility India “ a resource center on disability and rehabilitation for developing countries, especially those in Asia and Africa. He also was Secretary and, more recently, President of the Indian Society of Prosthetics/Orthotics and Rehabilitation Professionals. Chapal has worked for several international nongovernmental organizations and WHO in Nepal, Bangladesh, Sri Lanka, Mongolia, Vietnam, Guyana and Sierra Leone. Chapal is an ex officio member of the ISWP Advisory Board.