Prof. Peleg is highly involved in humanitarian aid to disaster affected areas. In December 1988 he served as the deputy head of the medical delegation (field hospital) to Kirovakan (today: Vanadzor) in Armenia. In 1995 he participated and was responsible for the operational dispatching of the IDF's field hospital following the Rwandan genocide. In September 2009, he was dispatched as an UNDAC expert to assist the government of Indonesia in assessing the needs and coordinating international aid following the West Sumatra earthquake.