* 2007 – present Member, Faculty Development Subcommittee, Academic Council, Georgia Health Sciences University/Medical College of Georgia
* 2006 – 2008-Chair, Faculty Development Subcommittee, Academic Council, Georgia Health Sciences University/Medical College of Georgia.
* 2007-Present-Member- Training Committee,American College of Gastroenterology
* 1996 – Present-Fellow, American College of Gastroenterology
* 1993 – Present Fellow, American College of Physicians
* 1996 – Present Fellow, American Gastroenterological Association

* Secretary of the Clerkship committee.UCL in Brussels - Faculty of Medicine.
* Board member Belgian Society of Transplantation (BST).
* President Organ Procurement Committee EUROTRANSPLANT INTERNATIONAL (ETI).
* Board member ETI Liver Advisory Committee (ELAC).
* Member National Belgian Transplant Council .
* Vice-President EUROPEAN SOCIETY OF ORGAN TRANSPLANTATION (ESOT).
* President Educational Committee ESOT.
* President European Society for Organ transplantation (ESOT).
* Scientific committee member European Transplant Procurement management (Barcelona)
* Chairman ESOT Ambassador Committee
* President Eurotransplant Liver Intestinal Advisory Committee (ELIAC)
* Expert member European Liver Transplant registry (ELTR)
* Expert member Centro Nationale Trapianto Italy
* Board member BST
* Member of the Belgian Transplant Council

* 1994-1997 Member of the Directive Council of S.I.C.O. (Italian Society of Surgical Oncology)
* 1994-1999 Regional Coordiator of the A.C.O.I. .
* 1999-2002 Member of the Executive Board A.C.O.I. 
* 2003-2008 Member of the Executive Board of the I.H.P.B.A.
(International Hepato-Pancreato-Biliary Association) Italian Chapter.
* 2006– Member of the European Surgical Association
* 2005– Member of the Scientific Board of the European Register of Colorectal Liver Metastases (LiverMetSurvey) 
* 2006-2008 President of the Società Piemontese di Chirurgia
* 2006– Honorary Member of the Association Française de Chirurgie
* 2008-2010 Vice-president of the I.H.P.B.A. (International Hepato-Pancreato-Biliary Association) Italian Chapter.
* 2010– President of the I.H.P.B.A. (International Hepato-Pancreato-Biliary Association) Italian Chapter.
* 1983-1998 member of the ’Association Recherche en Chirurgie (ARC)
* Member of the Società italiana di Chirurgia (SIC)
* Member of the International Association of Surgeons and Gastroenterologists (IASG)
* Member of the International Hepato-Pancreato-Biliary Association (IHPBA)
* Member of the Associazione Chirurghi Ospedalieri Italiani (ACOI)

* International Association of University Colorectal Surgeons
* Association of Academic Surgeons 
* American College of Surgeons
* American Hepato Pancreato Biliary Association
* International Hepato Pancreato Biliary Association
* Indian Association of Gastro Endoscopic Surgeon
* The Association of Surgical Education
* Royal College of Surgeons of Edinburgh
* The American Society of Clinical Oncology
* American Physiological Society
* Nw York Academy of Science
* Radiological Society of North America.
* Australian Medical Writer Association

* 2006-2008-Radiology Residency Education Council,Beth Israel Deaconess Medical Center, Boston, MA
* 2007-Graduate Medical Education Committee -Internal Review Committee for the Dermatopathology Fellowship Program Beth Israel Deaconess Medical Center, Boston, MA
* 2007-2008-Radiology Residency Program Selection Committee,Beth Israel Deaconess Medical Center, Boston, MA
* 2010-Radiology Residency Selection Committee,Department of Radiology,Beth Israel Deaconess Medical Center
* 2011-Hospital Interventional Procedures Committee,Beth Israel Deaconess Medical Center National
* 2010-Society of Interventional Radiology Foundation – Research Policy Division,Society of Interventional Radiology

• Professional Societies
* 2003-2009-Radiological Society of North America (RSNA),Member-in-Training
* 2007-Radiographics/RSNA Poster-Review Panel Member
* 2004-American College of Radiology-Resident Member
* 2004-2008-Massachusetts Radiological-Society-Resident Member
* 2007-2009-Society of Interventional Radiology-Member-in-Training
* 2009-Society of Interventional Radiology-Full member
* 2009-Radiological Society of North America (RSNA)-Full member
* 2009-New England Society of Interventional Radiology-Full member

* AACR since 1996
* European Society for Cancer Immunology and Immunotherapy since 2006
* Italian Pathology Society since 2006

* Austrian Society for Surgery
* Austrian Society for Transplantation, Transfusion und Genetics
* European Society of Organ Transplantation (ESOT)
* European Liver Transplant Association (ELTA)

* Member of the Scientific Board of Italian Cancer Society (S.I.C.)
* Member of American Association for Cancer Research (AACR)
* Member of Gruppo Oncologico dell’Italia Meridionale (GOIM)

* American Association for Cancer Research (AACR)
* Molecular Epidemiology Group (MEG) in AACR

* American Gastroenterology Association (AGA) - 2009
* American Society for Gastrointestinal Endoscopy (ASGE) - 2010
* American College of Gastroenterology - 2006

* Nederlandse Vereniging voor Hepatologie, 2008
* European Association for the Study of the Liver, 2012
* International Liver Transplantation Society, 2012

* American Society for Pharmacology and Experimental Therapeutics
* Society of Toxicology
* Research Society of Alcoholism
* The Endocrine Society
* American Association for Cancer Research
* European Association for Cancer Research
* American Association for the Advancement of Science
* Society of Chinese Bioscientists in America

* Royal College of Physicians, Canada

* Società Italiana di Fisiopatologia Chirurgica 1998
* Società Italiana Polispecialistica dei Giovani Chirurghi 1994-2009
* Società Siciliana di Chirurgia 1997-2011
* Società Italiana di Chirurgia 1999-2012
* International Hepato Pancreato Biliary Association October 2003-2012
* ASTS American Society of Transplant Surgeons 2004-2012
* Italian Society of Organ’s Transplantation 2010-2012
* International Liver Transplantation Society 2010-2012
* American College of Surgeons 2011-2012

* Indian Society of Gastroenterology-1986 – present
* Indian Association for the Study of Liver-1990 – present
* Association of Gastrointestinal Endoscopy of India-1990 – present
* Association of Physicians of India -1996 – present
* American Association for the Study of Liver Diseases-2003- present
* American Gastroenterology Association-2008 – present
* American Society of Gastrointestinal Endoscopy-2008 – 2011
* American College of Gastroenterology-2009 - 2012

* Chinese Medical Association-1993
* Chinese Neuroscience Association-1993
* Society for Neuroscience-2000
* American Gastroenterological Association-2005
* Sigma Xi-2000
* The Endocrine Society-2012

* American Association for the Study of Liver Diseases (AASLD) - 2011 – Present
* American Society of Investigative Pathology (ASIP) – 2007 – Present

* American pancreatic Association (APA)
* American Gastroenterological Association (AGA)

* Pennsylvania Medical Society-1983- 2003
* York County Medical Society-1983-2004
* American Gastroenterological Association-1978-2013
* Pennsylvania Society of Gastroenterology-1978-present
* Society for Neuroscience-2000- present
* American Neurogastroenterology and Motility Society 2009-present

* Utter Pradesh Science and Technology Association (UPSTA)
* Indian Pharmacology society (IPS)
* Indian Academy of Neuroscience (IAN)
* International Brain Research Organization (IBRO)

* American Society for Cell Biology, in 2007
* European Association for the Study of the Liver (EASL), since 2009
* American Association for the Study of Liver Diseases (AASLD), since 2010

* American Society of Gastrointestinal Endoscopy (2011)
* American Gastroenterological Association (2011)
* American Association for the Study of Liver Diseases (2010)
* American Medical Association (2007)
* Phi Beta Kappa Honor Society (2006)
* Philadelphia Medical Society (2006)

* American Association for Cancer Research, 2004
* American Pancreatic Association, 2007
* Society of Chinese Bioscientists in American, 2004

* German Physicians’ Association 1999−present
* German Association of Clinic Physicians 1999−2007
* American Association for Cancer Research 2003−present
* American Society of Gene Therapy 2003−2007
* American Medical Association 2005−present
* American Association for the Study of Liver Diseases 2008−present
* American Gastroenterological Association 2008−present