Zimmerman’s work consists of numerous projects including Desert, for which he was awarded the L’Iris d’Or Prize by the World Photography Organization. Mary Ellen Mark described the works as “a unique vision of the beauty, poetry, and power possible in great landscape photography.”

Zimmerman is co-founder of the Himalayan Art Centre, a free-school dedicated to teaching visual storytelling through photography and filmmaking in under-served regions of the Indian Himalayas. Zimmerman is a member of the World Photographic Academy.

Zimmerman’s monograph, One Voice; Portraits from the Tibetan Diaspora, was published by Kehrer Verlag, Heidelberg, Germany.