Chairman, Department of Orthopaedics, North Shore University Hospital and Long Island Jewish Medical Center
Chairman and Professor of Orthopaedic Surgery, Hofstra North Shore Long Island Jewish School of Medicine
American Orthopaedic Association, American Academy of Orthopaedic Surgeons, American Orthopaedic Society of Sports Medicine, Arthroscopy Association of North America, International Cartilage Repair Society, New York State Society of Orthopaedic Surgeons, Medical Society State of New York, Nassau County Medical Society