Bishop's work on shear moraines brought him to the attention of Sir Edmund Hillary, who invited him to join the Himalayan Scientific and Mountaineering Expedition of 1960-1961,[REF] where he served as the expedition's official glaciologist and climatologist [REF].
Barry's success with the Hillary expedition and his work with National Geographic led to an invitation to join the 1963 American Everest Expedition, which aimed to make the first American ascent of Mount Everest.