Intern Cornell University division Bellevue Hospital, 1940-1942, resident specializing in chest surgery Columbia University division, 1942-1943. Resident, chief Bronx Veterans Hospital, 1946-1948. Chief thoracic surgery Deshon Veterans Hospital, 1949.
Practice medicine specializing in surgery New York City, since 1950. Emeritus director surgery Beth Israel Medical Center, 1962-1976. Professor surgery Mount Sinai School Medicine, since 1965.
1st distinguished lecturer society American Gastrointestinal Surgeons, 1987. Visiting professor or invited guest lecturer over 40 medical schools university centers, over 150 teaching hospitals, numerous national and international cancer conferences in the United States, England, South Africa, Kenya, Israel, Mexico, Canada, Union of the Soviet Socialist Republics, France and Puerto Rico.
Served to major Medical Corps Army of the United States, 1943-1946, European Theatre of Operations. Member American College of Surgeons, American College Gastroenterology (board governors), American Association for Thoracic Surgery, Society Thoracic Surgeons (founding), Society for Surgery Alimentary Tract, American College Chest Physicians, American Gastroenterologic Association, International Society Surgery, International Cardiovasc. Surgical Society, New York Surgical Society (president 1980-1981), New York Academy Medicine (chairman section on surgery), Association Alumni Bellevue Hospital (president 1982), Aspetuck Valley Country Club.