- 2012 - presentMayo Clinic International Health Program 
- 2006 - presentChairInternational Activities Committee, Mayo Clinic Florida Committees 
- 2006 - presentMemberInternational Activities Committee, Mayo Clinic Florida Committees 
- 2003 - presentChairInternational Relations Office, Mayo Clinic Florida Committees 
- 2003 - presentMemberInternational Relations Committee, Mayo Clinic Committees 
- 2002 - 2008MemberHospital Leadership Integration Team, Mayo Clinic Florida Committees 
- 2002 - 2007MemberHospital Planning Group, Mayo Clinic Florida Committees 
- 2000 - 2003ChairInternational Activities Committee, Mayo Clinic Florida Committees 
- 2000 - presentMemberAmerican Society of Tropical Medicine and Hygiene 
- 1999 - 2003MemberInternational Activities Coordinating Committee, Mayo Clinic Committees 
- 1999 - 2003MemberInternational Activities Executive Committee, Mayo Clinic Committees 
- 1999 - 2003MemberInternational Education Committee, Mayo Clinic Committees 
- 1999 - presentMemberMayo School of Continuing Medical Education Subcommittee, Mayo Clinic Florida Committees 
- 1999 - presentMemberInternational Society of Travel Medicine 
- 1998 - 2006MemberInternal Medicine Administrative Committee, Mayo Clinic Florida Committees 
- 1998 - presentMemberLiver Transplant Selection Committee, St. Luke's Hospital 
- 1998 - presentMemberKidney/Pancreas Transplant Selection Committee, St. Luke's Hospital 
- 1998 - presentMemberHeart/Lung Transplant Selection Committee, St. Luke's Hospital 
- 1998 - presentMemberAmerican Academy of HIV Medicine 
- 1994 - 2005MemberPharmacy and Therapeutics Committee, St. Luke's Hospital 
- 1994 - presentMemberSociedad Colombiana de Gastroenterologia 
- 1992 - 1993MemberRevenue Systems Committee, Mayo Clinic Florida Committees 
- 1991 - 2002MemberFlorida Medical Association 
- 1991 - 2000MemberInternational Activities Committee, Mayo Clinic Florida Committees 
- 1991 - presentMemberDuval County Medical Society 
- 1983 - presentMemberInfectious Diseases Society of America 
- 1983 - presentMemberSociedad Mexicana de Cardiologia 
- 1982 - presentMemberPanamerican Society for Infectious Diseases 
- 1978 - 1984MemberAmerican Society for Microbiology 
- 1978 - presentMemberMassachusetts Medical Society 
- 1977 - presentMemberAmerican College of Physicians 
-  MemberClinical Risk Management Committee, Mayo Clinic Florida Committees 
-  FellowAmerican College of Physicians 
-  FounderPanamerican Society for Infectious Diseases 
-  FellowInfectious Diseases Society of America 
-  Invited MemberSociedad Mexicana de Cardiologia 
-  Honorary MemberSociedad Colombiana de Gastroenterologia