Education
Holy Cross College, AB Honors - Pre Med, 1960 - 64
Downstate Medical Center, M.D., 1964 - 68
State University of New York, Brooklyn, NY

Internship
St. Raphael's Hospital, Str. Med. Intern, New Haven, CT, 1968 - 69

Residency
Hartford Hospital, General Surgery, 1972 - 73
Hartford, Connecticut

Special Training
University of Connecticut Orthopedic Program, 1973 - 76

Certified
American Board of Orthopedic Surgery, 9/9/1977

Military
US Navy, LCDR, MC, USNR, 1969 - 72
Ensign 1915 Program, 1967 - 68
Squadron Medical Officer, Desron 36, 1969 - 70
General Medical Officer, Naval Base Dispensary, VA, 1970 - 72

Professional Societies
Hartford County Medical Association, 1976 - present
Connecticut State Medical Society, Ortho Section, 1977 - present
UConn Orthopedic Club, 1976
American Academy of Orthopedic Surgeons, Fellow, 1977 - present
American Association of CP and Development Med., 1979
Arthroscopy Association of North America, 1987 - present
Irish-American Orthopedic Association, 1983 - present
New England Orthopedic Society, 1992 - present

Offices
Chairman, HCMA Ethnics Committee, 1982 - 86
Board of Directors Member, HCMA, 1982 - 86
Associate Councilor, HCMA to CSMC, 1986 - 89
Secretary-Treasurer, CSMS Ortho Section, 1990 - 95
Board Member, Grtr. Hartford Orthopedic Foundation, 1990 - present (Chairman)
Chairman, Dept. of Orthopedic Surgery, St. Francis Hospital and Medical
Center, 1992 - 97
Councilor for Connecticut, AAOS Board of Councilors, 1995 - 98
Member, Underwriting Committee, CMIC, 1996 - present
Orthopedic Consultant to Blue Cross Blue Shield of CT, 1994 - present
Member, Committee on Graduate Medical Education, St. Francis
Hospital and Medical Center, 1996 - present

Bibliography
O'Brien, J. J., & Gossling, H. R., A review of the first 101 total hip arthroplasties
at Hartford Hospital Conn Medicine Vol 40, No 9 pp587-92, September 1976
O'Brien, J. J., Butterfield, W., & Gossling, H. R., Jefferson fracture with disruption
of atlanto-axial ligament:  A Case Report.  Clinical Orthopedics & Related
Reasearch #126 July-August 1977 pp 135-38
O'Brien, J. J. & Sirkin, R. B., The Natural History of the Dislocated Hip, Cerebral Palsy Journal of Developmental Medicine and Child Neurology, abstracts
O'Brien, J.J. & Slavin, J., Bilateral Femoral Neck Stress Fractures in Adult Runners
O'Brien, J. J., Slavin, J., Vento, J., & Spencer, R., Bilateral "Simultaneous" Femoral Neck Fractures Following Minimal Stress, Clinical Nuclear Medicine, June 1986, Vol 11, No 6

Hospital Appointments
St. Francis Hospital & Medical Center - Active Orthopedic Staff
Mt. Sinai Hospital - Active Orthopedic Staff
Connecticut Children's Hospital - Visiting Staff
John Dempsey Hospital - Clinical Associate
Hartford Hospital - Courtesy Orthopedic Staff

Teaching Appointments
University of Connecticut Medical Center, John Dempsey Hospital - Assistant Clinical Professor

Lectures
"Total Joint Arthroplasty of the Shoulder" - 9/28/91 at St. Francis Hospital
Co-Chairman of course "Outcomes Research & Practice Guidelines in Orthopedics:  A Community Perspective" - 11/15/91 at Marriott, Rocky Hill, CT
7th Annual Disabled Workers Symposium - 10/12/94 at Raddison Hotel & Conference Center, Rocky Hill, Connecticut - Lecturer

CME
Crucial Decisions in THR, Boca Raton, Florida - May 1991, 8 hours Catagory 1
State of the Art Knee Review Course, New York City, New York - 1991, 1994, 1995,
1996, 24 CME
Campbell Clinic Symposium, Phoenix, Arizona - February 1992, 34 CME
AAOS, Specialty Day, Washington, DC, 7 CME
AAOS, 59th Annual Meeting, Washington, 30.50 CME
AANA, 11th Annual Meeting, 14.25 CME
POSNA, 1992 Annual Meeting, Newport, Rhode Island, 13.50 CME
AAOS, Current Concepts in Open Fracture Management, New York City, New York,
7 CME
American College of Surgeons, ATLS Course, June 1993, 16 CME
AAOS Annual Meeting - 1995 San Francisco, California
AAOS Annual Meeting - 1996 Atlanta, Georgia
AAOS Annual Meeting - 1997 San Francisco, California
Editor, "BackBone" Newsletter for the Connecticut State Medical Society, Orthopedic Section, Semi-annual since 1995
Connecticut State Medical Society Annual Meeting - May 15, 1998