A former India hockey midfielder, Dr. Paes was part of the national team that won the bronze medal at the 1972 Olympic Games in Munich. He was the husband of former basketball player Jennifer Paes and the father of Olympic bronze medallist tennis player Leander Paes.
In football, Dr. Paes made invaluable contributions to sports medicine in India. He was Chairman of the AIFF Medical Commission from 2003 to 2006, during which he conceptualised comprehensive sports medicine programmes, sports medicine centres, training and accreditation of sports medicine teams, and propagated the Peak Performance Programme with the national teams (seniors, U19, U17 and U15), as well as various National Football League clubs.
He later served as Chairman of the AIFF Medical Committee from 2017–2020.