- 2018 - presentChairPersonnel Committee, Mayo Clinic Florida Committees 
- 2016 - presentMemberPersonnel Committee, Mayo Clinic Florida Committees 
- 2015 - 2016PresidentAmerican College of Gastroenterology 
- 2014 - 2015President-ElectAmerican College of Gastroenterology 
- 2014MemberChair Search: Florida Chief Financial Officer, Mayo Clinic Florida Task Forces 
- 2014MemberSearch: Florida Chief Administrative Officer, Mayo Clinic Florida Task Forces 
- 2014 - presentMemberMayo Clinic Abroad 
- 2013MemberEducational Affairs Committee, American College of Gastroenterology 
- 2013 - 2014Vice PresidentAmerican College of Gastroenterology 
- 2013MemberChair Search:  Dean for Research, Mayo Clinic Florida Task Forces 
- 2012 - 2013TreasurerAmerican College of Gastroenterology 
- 2012 - 2013ChairFinance Committee, American College of Gastroenterology 
- 2012 - 2017MemberOffice of Leadership and Organizational Development 
- 2012 - 2014Advisory Committee, Center for Science of Healthcare Delivery 
- 2011 - 2012SecretaryAmerican College of Gastroenterology 
- 2010 - presentMemberExecutive Operations Team - Florida, Mayo Clinic Florida Committees 
- 2010 - presentFellowAmerican College of Physicians 
- 2009 - presentCo-Editor, Education UniverseAmerican College of Gastroenterology 
- 2008 - 2015MemberAbstract Selection Committee (Endoscopy, Gastric and Intestinal Disorders), American Gastroenterological Association 
- 2008 - 2011MemberTechnology Assessment Subcommittee, American Gastroenterological Association 
- 2007 - 2008MemberNeuroscience Business Plan, Mayo Clinic Florida Task Forces 
- 2007 - 2008MemberChair Search:  Division of Hematology and Oncology, Mayo Clinic Florida Task Forces 
- 2006 - 2010MemberCommittee on Clinical Practice and Practice Economics, American Gastroenterological Association 
- 2006MemberChair Search: Department of Medicine, Mayo Clinic Florida Task Forces 
- 2006MemberChair Search: Department of Surgery, Mayo Clinic Florida Task Forces 
- 2004Course DirectorAmerican College of Gastroenterology 
- 2004 - presentMemberResearch & Education Academic Information Management System Oversight Committee, Mayo Clinic Education Committee, Mayo Clinic Committees 
- 2003ChairTask Force on Funding of Clinical Research, Mayo Clinic Florida Task Forces 
- 2003Sub-chairUpper GI Section, Annual Scientific Program Committee, American Society for Gastrointestinal Endoscopy 
- 2002 - 2005MemberResearch Committee, American College of Gastroenterology 
- 2002 - 2004MemberNominating Committee, Clinical Practice Section, American Gastroenterological Association 
- 2002 - presentMemberInternal Medicine Administrative Committee, Mayo Clinic Florida Committees 
- 2001 - 2007Executive MemberResearch Committee, Mayo Clinic Florida Committees 
- 2001 - 2004MemberAnnual Scientific Program Committee, American Society for Gastrointestinal Endoscopy 
- 2001Co-ChairContinuing Medical Education (CME) Program on Gastroesophageal Reflux Disease (GERD) 
- 2000 - 2006TrusteeAmerican College of Gastroenterology 
- 2000 - 2005MemberFacility Planning Committee, Mayo Clinic Florida Committees 
- 2000 - 2002MemberEsophageal motility, secretion and sensation subcommittee, Digestive Disease Week, American Gastroenterological Association 
- 2000 - 2001ChairNational Consultants Program for Reflux Disease, Astra Zeneca International 
- 2000ChairCurrent Clinical Challenges in Barrett's Esophagus: Therapy and Future Perspectives 
- 1999 - 2009MemberGastroenterology and Hepatology Administrative Committee, Mayo Clinic Florida Committees 
- 1999Co-DirectorAnnual Postgraduate Course (DDW), American Gastroenterological Association 
- 1999Course Director1999 Past Presidents' Regional Postgraduate/Practice Management Course, American College of Gastroenterology 
- 1998 - 2000GovernorNorth Florida, American College of Gastroenterology 
- 1998 - 2007MemberClinical Studies Unit Advisory Committee, Mayo Clinic Florida Committees 
- 1998 - 2004MemberClinical Practice Section, Program Planning Committee, American Gastroenterological Association 
- 1998 - 2000MemberPublic Affairs and Advocacy Committee, American Gastroenterological Association 
- 1998ChairEsophageal Reflux Subcommittee, Digestive Disease Week, American Gastroenterological Association 
- 1997Section ChairUpdate on Gastrointestinal Motility Slide Set, American College of Gastroenterology 
- 1996 - 2007MemberResearch Committee, Mayo Clinic Florida Committees 
- 1995 - 2011MemberPublications Committee, American College of Gastroenterology 
- 1995 - 2002Co-EditorOfficial Web Page, American College of Gastroenterology 
- 1994 - 2008MemberPractice Parameters Committee, American College of Gastroenterology 
- 1994 - 1995ChairEsophageal Reflux Subcommittee, Digestive Disease Week, American Gastroenterological Association 
- 1992 - presentAbstract ReviewerAmerican College of Gastroenterology 
-  ChairClinical Research Subcommittee, Research Committee, Mayo Clinic Florida Committees 
-  ChairNeuroscience Business Plan, Mayo Clinic Florida Task Forces 
-  ChairChair Search:  Division of Hematology and Oncology, Mayo Clinic Florida Task Forces 
-  MemberSearch Committee: Chief Financial Officer, MCF, Mayo Clinic Florida Task Forces 
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-  FellowAmerican College of Gastroenterology 
-  ChairPublications Committee, American College of Gastroenterology 
-  MemberFlorida Gastroenterological Association 
-  MemberDuval County Medical Society 
-  MemberFlorida Medical Association 
-  MemberFlorida Chapter, American College of Physicians