- American Academy of Orthopedic Surgeons , Fellow – 1981
- American College of Surgeons, Fellow – 1983
- International College of Surgeons, United States Section, Orthopedic Surgery Fellow – 1981
- Cervical Spine Research Society – 1979
- New York State Society of Orthopedic Surgeons – 1978
- New York Academy of Medicine – 1979
- Irish Medical Association – 1969
- British Medical Association – 1969
- Simmons Surgical Society – 1976
- New York State and New York County Medical Society
- American Medical Association
- Irish American Orthopedic Society – 1980
- Spine Fixation Study Group – 1987
- Scoliosis Research Society -1988
- North American Spine Society – 1988
- Academic Orthopedic Society – 1991