A Sardar or Sirdar is a Sherpa mountain guide who manages all the other Sherpas in a climbing expedition or trekking group; Sirdar is the most common spelling used in the majority of English-language mountaineering literature.
In climbing teams, a Sardar or Sirdar serves as a leader who supervises and organizes the efforts of other Sherpas during expeditions or treks, with this designation being widely used in mountaineering publications.