Career
He became the Israeli Minority Affairs Ministry director general, Tel Aviv, in 1949. The Village files are still censored. Benei Binyamin, Petah Tikva, Hanotea, Netanya.
Machnes was intimately involved with the Israeli government regularisation of the systematic appropriation of Abandoned Arab property and Transfer policy of the Yishuv.
Machnes was one of David Ben-Gurion"s most Hawkish advisers during the 1947–1948 Civil War in Mandatory Palestine and the following 1948 Arab–Israeli War. Machnes has a street named after him in Netanya.