1 AAES
2 AASLD
3 ACS
4 American Association of Endocrine Surgeons
5 American Board of Surgeons
6 American Gastroenterological Association
7 American Hepato-Pancreatico-Biliary Association (AHPBA)
8 American Medical Association
9 American Pancreatic Association
10 American Society of Transplant Surgeons
11 American Society of Transplantation (AST)
12 Association for Academic Surgery
13 Clinic Medical Director
14 Galveston County Medical Society
15 International Hepato-Pancreatico-Biliary Association (IHPBA)
16 International Liver Transplantation Society
17 National Board of Medical Examiners
18 Ohio State Medical Association
19 Pancreas Club
20 President (2003-2004)
21 Professor & Chair, Shepard Thompson Clingan Chair
22 Resident Program Director
23 Scientific Staff (1993-1997)
24 Society for Surgery of the Alimentary Tract
25 Society of American Gastrointestinal Endoscopic Surgeons
26 Southwestern Surgical Congress
27 SSAT
28 Surgical Clerkship Director
29 Texas Medical Association
30 Texas Society for Gastroenterology and Endoscopy
31 Texas Transplantation Society
32 Western Surgical Association