From 1955 to 1956, Eidelberg worked as a Project Manager for Mekorot, in the construction of the Haifa Tel Aviv water line, and the construction of the Ein Harod water reservoir. In 1956, he took part in the Sinai War, after which he became the Plant Manager of the Timna Valley Copper Mines. In 1958, Eidelberg became the General Manager of the Dead Sea Works until 1961, reporting to the Director General Mordechai Maklef (Hebrew: מרדכי מקלף), who was a retired Chief of staff of the IDF. From 1961 to 1964, he served as the General Manager of the Israel Shipyards. Between 1964 and 1968 he became the Branch Manager of Tahal, Iran, where he started exploring the mystery of the Ten Lost Tribes. He later became the manager of the Tahal branch in the Ivory Coast (1968-1972), where he explored the mystery of Exodus. From the mid-1960s until his death in 1985, Eidelberg continued exploring and writing books about The Exodus and the Ten Lost Tribes of Israel.[1]