When Margo arrived in Israel, he assessed the issues and needs of the fledgling Israeli Air Force. He hammered out visionary blueprints and strategies for a small, but highly efficient and powerful air force. On the foundation of Margo's work, the modern day Israeli Air Force was built. Ben Gurion, who developed an admiration and fondness for Margo, asked him to remain in Israel as commander of the Israeli Air Force with the rank of "Aluf" Major General. But Margo declined, preferring to return to South Africa to resume his legal practice. Upon returning to South Africa, he was instrumental in formulating and monitoring the Advanced Pilots Training Course in Germiston, where South Africans were trained as pilots for the Israeli Air Force. He remained a staunch supporter of Israel through the years, often returning and visiting Air Force bases.