He won gold medals in the 1956 Summer Olympics and the 1964 Summer Olympics. He was assistant captain of the team that won the gold medal in the 1966 Asian Games, and was later a field hockey administrator and television commentator. He received the Arjuna Award for excellence in athletic competition in 1998.
In the early days of the 1962 Sino-Indian War, Kaushik was commanding the forward company at the Battle of Bumla along the border between India and China when the Chinese People’s Liberation Army invaded on 23 October. During heavy combat with much larger enemy forces, he led a successful retreat, saving the unit’s heavy machine guns and mortars.