Sonam was born in Darjeeling to
Tibetan refugee parents. His father, , who was born in the
Kumbum area of Amdo (Chinese: Qinghai Province), served as Chief of Operations for the Tibetan resistance movement from the late 50s until the early 70s, and later, as a Minister in the Dalai Lama’s government-in-exile. His mother, Tashi Dolma, was from a village near
Lhasa in central
Tibet. Sonam studied at the Jesuit boarding school, St Joseph’s College, in
Darjeeling. He did his undergraduate studies at St Stephens College,
Delhi University. After a year each at Scottsdale Community College in Arizona and
Santa Monica College in California, he went to the
University of California, Berkeley’s Graduate School of Journalism where he specialised in documentary filmmaking. After graduating from Delhi University in 1978, Sonam worked for a year in the Security Department of the Tibetan government-in-exile in Dharamshala. He then worked as a dishwasher in Manhattan, a gardener in Scottsdale and a janitor in Berkeley. He was the manager of Del Rey Car Wash in Marina del Rey, California, for a year. After graduating from Berkeley, he worked for four years as Programming Director at the Meridian Trust in London, along with his partner
Ritu Sarin. In 1991, he and
Sarin founded White Crane Films and has made independent films under the banner ever since. In 2012, Sonam and Sarin started the
Dharamshala International Film Festival at McLeod Ganj, Himachal Pradesh. The festival ranks amongst the best film festivals of India. == Films ==