Ang Nyima, who lived in Darjeeling, was on both the spring and fall Swiss expeditions to Everest in 1952. In 1953, he worked on the Lhotse Face, and was the only Sherpa apart from Tenzing Norgay to carry a load to the top camp.
Later that year he went to the Annapurna Group with the Japanese. In 1957 he went to Machhapuchare and in 1960 to Annapurna II, reaching the summit. Later, he enlisted in the 10th Gurkha Rifles and saw service in Malaya and Borneo.