- 2023 - 2024ChairSheikh Shakhbout Medical City in partnership with Mayo Clinic 
- 2022 - 2024Medical DirectorSheikh Shakhbout Medical City in partnership with Mayo Clinic 
- 2022 - 2024ChairSheikh Shakhbout Medical City in partnership with Mayo Clinic 
- 2022ChairWorld Endoscopy Organization (WEO) 
- 2021 - 2024ChiefSheikh Shakhbout Medical City in partnership with Mayo Clinic 
- 2020 - presentCo-ChairmanAmerican Society for Gastrointestinal Endoscopy  
- 2019 - presentFellowJapan Gastroenterological Endoscopy Society 
- 2019 - presentFellowJapanese Gastroenterological Endoscopy Society for  (JGES) 
- 2018 - 2019PresidentFlorida Gastroenterologic Society 
- 2017 - 2018TreasurerFlorida Gastroenterologic Society 
- 2017SecretaryFlorida Gastroenterologic Society 
- 2015Task Force MemberStrategic Planning Advisory Group, American Society for Gastrointestinal Endoscopy 
- 2015 - 2020Committee MemberMember: Annual Scientific Program Committee, American Society for Gastrointestinal Endoscopy 
- 2014ChairChair: Selection Committee for Covidien Pilot Award in Technology, American Gastroenterological Association 
- 2014ChairSelection Committee for Augustyn Award in Digestive Cancer, American Gastroenterological Association and American Society of Gastrointestinal Endoscopy 
- 2013 - presentCommittee MemberResearch Awards Committee, American Gastroenterological Association 
- 2013 - 2014Committee MemberTask Force on Assessment and Certification in Endoscopic Mucosal Resection, American Society for Gastrointestinal Endoscopy 
- 2013 - presentCommittee ChairOptical Diagnosis of Colorectal Polyps, Colorectal Cancer Screening, World Organization for Digestive Endoscopy 
- 2012 - presentCommittee MemberNominations Committee, American Society for Gastrointestinal Endoscopy 
- 2011 - presentMemberResearch Development Subcommitee 
- 2010 - 2011ChairSelection Committee; Hemetology/Oncology Chief, Chair Search:  Division of Hematology and Oncology, Mayo Clinic Florida Task Forces 
- 2010 - presentChairEndoscopy Management Software Selection Committee, Mayo Clinic Committees 
- 2009 - 2011MemberMedicare Coverage Advisory Committee, Health Care Financing Administration, U.S. Department of Health and Human Services 
- 2009MemberAd Hoc Review Committee, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health 
- 2009MemberZDK1-GRB-8 J4 1 Study Section, Endoscopic Research in Pancreatobiliary Disease, Ad Hoc Review Committee 
- 2009 - presentMemberItalian Endosonography Club 
- 2009 - presentMemberMedicare Coverage Advisory Committee, Centers for Medicare and Medicaid Services, U.S. Department of Health and Human Services 
- 2009 - presentMemberAmerican Association for Cancer Research 
- 2008ChairmanEndoscopic Research in Pancreatobiliary Disease, Ad Hoc Review Committee, National Institute of Diabetes and Digestive and Kidney Diseases 
- 2008MemberEndoscopic Research in Pancreatobiliary Disease, Ad Hoc Review Committee, National Institute of Diabetes and Digestive and Kidney Diseases 
- 2008 - 2011ChairpersonResearch Committee, American Society for Gastrointestinal Endoscopy 
- 2008 - 2010Vice/Associate Chair for ResearchAdministrative Committee, Department of Internal Medicine 
- 2008Nominations ChairImaging and Advanced Technologies, American Gastroenterological Association 
- 2008ChairmanAbstract Selection Committee, American Gastroenterological Association 
- 2007 - presentMemberPublications Comittee, American Gastroenterological Association 
- 2007 - 2008MemberMCCC, Cancer Center Executive Committee, Mayo Clinic Cancer Center Committees 
- 2007 - presentMemberGI Disease Oriented Group, Cancer Center Clinical Research Committee, Mayo Clinic Cancer Center Committees 
- 2007 - 2010MemberAdministrative Committee, Department of Internal Medicine 
- 2007ChairmanAbstract Selection Committee, American Gastroenterological Association 
- 2006 - 2007MemberAmerican Gastroenterological Association 
- 2006MemberAmerican College of Gastroenterology 
- 2006MemberFellow of the ACG, American College of Gastroenterology 
- 2006MemberStrategy Planning Advisory Group, American Society for Gastrointestinal Endoscopy 
- 2006 - 2008MemberResearch Committee, Mayo Clinic Florida Committees 
- 2006ChairmanAbstract Selection Committee, American Gastroenterological Association 
- 2006 - presentMemberOffice of Intellectual Property (formerly Mayo Medical Ventures) 
- 2006 - presentFellowAmerican Society for Gastrointestinal Endoscopy 
- 2006 - presentFellowAmerican College of Gastroenterology 
- 2006 - presentMemberAmerican Society for Gastrointestinal Endoscopy 
- 2005 - 2010ChairResearch Committee, Gastrointestinal Research, Division of Gastroenterology & Hepatology 
- 2005 - 2008MemberResearch Committee, Gastrointestinal Research, Division of Gastroenterology & Hepatology 
- 2005 - presentMemberDivision of Gastroenterology & Hepatology, Department of Internal Medicine 
- 2005 - 2007Panel MemberGuidelines for Lung Cancer, American College of Chest Physicians 
- 2005 - 2007MemberAmerican College of Chest Physicians 
- 2004 - 2006ChairImaging and Advanced Technologies, American Gastroenterological Association 
- 2004 - 2005Vice ChairASGE Website Editorial Board, American Society for Gastrointestinal Endoscopy 
- 2004MemberTask Force on Endoscopic Research, American Society for Gastrointestinal Endoscopy 
- 2003 - presentMemberGastroenterology Hospital Committee, Division of Gastroenterology & Hepatology, Department of Internal Medicine 
- 2003 - presentMemberEndoscopy Committee, Division of Gastroenterology & Hepatology, Department of Internal Medicine 
- 2003 - presentMemberFlorida Gastroenterologic Society 
- 2003 - 2004Vice ChairImaging and Advanced Technologies, American Gastroenterological Association 
- 2002 - 2006MemberAGA Council, American Gastroenterological Association 
- 2002MemberTranslation Research Retreat: GI, Hollings Cancer Center, Medical University of South Carolina 
- 2001MemberSearch Committee: Director of Research, Hollings Cancer Center, Medical University of South Carolina 
- 2001 - presentMemberAbstract Selection Committee, American Gastroenterological Association 
- 2001 - presentMemberCancer Screening Committee, World Organization for Digestive Endoscopy 
- 2000 - 2008MemberResearch Committee, American Society for Gastrointestinal Endoscopy 
- 2000 - 2003Co-DirectorDigestive Disease Center, Medical University of South Carolina 
- 2000 - 2003MemberClinical Economics and Outcomes Committee, Cancer and Leukemia Group B 
- 2000 - 2002MemberClinical Research Committee, Hollings Cancer Center, Medical University of South Carolina 
- 2000 - 2002MemberData Safety Monitoring Board, Hollings Cancer Center, Medical University of South Carolina 
- 2000 - 2001MemberCancer Program Committee, Hollings Cancer Center, Medical University of South Carolina 
- 2000 - presentMemberEUS Special Interest Group, American Society for Gastrointestinal Endoscopy 
- 1998 - 2003MemberSouth Carolina Medical Association 
- 1998 - 2003MemberSouth Carolina Gastroenterology Association 
- 1998 - 2003MemberCharleston County Medical Society 
- 1997 - 1998MemberResearch Committee, American College of Gastroenterology 
- 1997 - 1998MemberPublications Committee, American College of Gastroenterology 
-  Associate EditorAtlas of Endoscopic Ultrasound, American Society for Gastrointestinal Endoscopy 
-  Co-ChairTranslation Research Retreat: GI, Hollings Cancer Center, Medical University of South Carolina 
-  MemberMedicare Coverage Advisory Committee, Health Care Financing Administration, U.S. Department of Health and Human Services