Gary lived and worked in Tel Aviv, both teaching and in the private practice of Endodontics for several years. He returned to San Antonio, Texas to complete his residency in Endodontics, after which he began private practice in the Washington , DC area, from which he retired after 33 years. During his time in practice, he completed a MPH degree from Johns Hopkins University. He volunteered in the Dominican Republic , providing dental services. He was director of the Oral Health section of Health Volunteers Overseas for 6 years, he did site visits to open volunteer projects for HVO members in Latvia, Ukraine, Nicaragua, and Mozambique. He also served on the International Steering Committee for the American Dental Association and the International Development Committee of the World Dental Federation and served on the board of Jewish-Healthcare International, a joint Israeli-American NGO.