American Academy of Achievement

American Association of Genito-Urinary Surgeons

American Surgical Association

American Urological Association

American Urological Association, Mid-Atlantic Section

American Fertility Society

American Society of Andrology

Baltimore Monthly Medical Society

Clinical Society of Genito-Urinary Surgeons

Comite Internacional de Andrologia (CIDA)

Endocrine Society

Fellow, American College of Surgeons, 1976-1980

Irish Society of Urology

Peripatetic Club

Society of University Surgeons

Society of Urologic Oncology

Urological Investigators Forum

U.S. Section, Societe Internationale d’Urologie

Honorary member, Urological Society of Australasia

Honorary member, German Society of Urology

British Association of Urologic Surgeons, Honorary Member, 1998

Paul Harris Fellow, International Rotary Foundation, 1999

Honorary Royal College of Surgeons of Ireland, 2004

Honorary Royal College of Surgeons of England, 2004