- 2015 - 2017Chair ElectScientific Advisory Board, Lymphoma Research Foundation 
- 2015 - 2017Chair ElectScientific Advisory Board, Lymphoma Research Foundation 
- 2012MemberConstitution Committee, Eastern Cooperative Oncology Group 
- 2012MemberConstitution Committee, Eastern Cooperative Oncology Group 
- 2007 - presentMemberExecutive Committee, Lymphoma Research Foundation 
- 2006 - presentMemberScientific Advisory Board, Lymphoma Research Foundation 
- 2005MemberProgram Committee, Lymphoma Research Foundation 
- 2005 - presentMemberLymphoma Research Foundation 
- 2004 - presentMemberFrontier Science Board of Directors, Eastern Cooperative Oncology Group 
- 2000 - 2012Advisory Board MemberEastern Cooperative Oncology Group 
- 2000Associate EditorMayo Internal Medicine Board Review Book, Mayo Foundation for Medical Education and Research 
- 2000 - presentEditorial Board MemberAmerican Society of Clinical Oncology 
- 1999 - 2006ChairBoard Recertification in Internal Medicine, Mayo Clinic Task Forces/Work Groups 
- 1999 - 2006ChairInstitution Task Force on Meals at Education Conferences, Mayo Clinic Task Forces/Work Groups 
- 1999 - 2006LeaderTask Force for the development of a mechanism for the electronic accounting, Continuity Clinic, Department of Internal Medicine 
- 1999 - 2006ChairInitiative on Academic Appointments in the Department of Medicine, Department of Internal Medicine 
- 1999 - 2006ChairTask Force on Board Recertification in Internal Medicine, Department of Internal Medicine 
- 1999 - 2006LeaderIntegrated Curriculum Task Force, Residency and Subspecialty Training Programs, Department of Internal Medicine 
- 1999 - 2006MemberBoard Recertification in Internal Medicine, Mayo Clinic Task Forces/Work Groups 
- 1999 - 2006MemberInstitution Task Force on Meals at Education Conferences, Mayo Clinic Task Forces/Work Groups 
- 1999 - 2006MemberLeadership Committee, Department of Internal Medicine 
- 1999 - 2006MemberTask Force for the development of a mechanism for the electronic accounting, Continuity Clinic, Department of Internal Medicine 
- 1999 - 2006MemberInitiative on Academic Appointments in the Department of Medicine, Department of Internal Medicine 
- 1999 - 2006MemberTask Force on Board Recertification in Internal Medicine, Department of Internal Medicine 
- 1999 - 2006MemberIntegrated Curriculum Task Force, Residency and Subspecialty Training Programs, Department of Internal Medicine 
- 1998 - 2006MemberExecutive Committee, Department of Internal Medicine 
- 1998 - 2006ChairGraduate Education Committee, Internal Medicine and Medical Specialties, Mayo Graduate School of Medicine 
- 1998 - 2006MemberMayo Nurse Practitioner and Physician Assistant Joint Advisory Committee, Department of Internal Medicine 
- 1998 - 2006MemberAssociation of Program Directors in Internal Medicine 
- 1998 - 2004MemberEducation Committee, Mayo Clinic Rochester Committees 
- 1998 - 2002MemberEducation Visibility Task Force, Mayo Clinic Rochester Task Forces 
- 1998 - presentMemberInternational Society of Hematology 
- 1997 - 2014MemberMinnesota Society of Clinical Oncology 
- 1997 - 2012MemberFoundation Committee, Eastern Cooperative Oncology Group 
- 1997 - 1999MemberBoard of Trustees, Minnesota Society of Clinical Oncology 
- 1997 - presentMemberAudit Committee, Eastern Cooperative Oncology Group 
- 1996 - 1997MemberExecutive Committee, Eastern Cooperative Oncology Group 
- 1995 - 2015ChairFiscal Oversight Committee, Eastern Cooperative Oncology Group 
- 1995 - 1999MemberStaff Utilization & Funding Allocation Subcommittee, Mayo Clinic Cancer Center - Rochester, Mayo Clinic Cancer Center 
- 1995 - 1999MemberCancer Center Clinical Research Committee, Division of Hematology, Department of Internal Medicine 
- 1995 - 1998MemberAdministrative Committee, Hematology Research Section Committee, Division of Hematology 
- 1995 - presentMemberFiscal Oversight Committee, Eastern Cooperative Oncology Group 
- 1995 - presentMemberAssociation of Subspecialty Professors 
- 1994 - 2014Scientific AdvisorAudit Committee, North Central Cancer Treatment Group 
- 1994 - 1995MemberConstitution Committee, Eastern Cooperative Oncology Group 
- 1994 - 1995MemberInternal Review Committee, Eastern Cooperative Oncology Group 
- 1994 - 1995MemberConstitution Committee, Eastern Cooperative Oncology Group 
- 1994MemberNominating Committee, Association of Hematology/Oncology Program Directors 
- 1994 - presentMemberAudit Committee, North Central Cancer Treatment Group 
- 1993 - 1995MemberOncology Research Committee, Division of Hematology, Department of Internal Medicine 
- 1993 - presentMemberPrincipal Investigator Committee, Eastern Cooperative Oncology Group 
- 1993 - presentMemberPrincipal Investigator, U10 Grant, Eastern Cooperative Oncology Group 
- 1992 - presentMemberAmerican Society of Clinical Oncology 
- 1991 - 2014Active MemberNorth Central Cancer Treatment Group 
- 1991 - 2014MemberNorth Central Cancer Treatment Group 
- 1991 - 2004ChairLymphoma Disease-Oriented Group, Division of Hematology, Department of Internal Medicine 
- 1991 - 2000MemberHematology Committee, North Central Cancer Treatment Group 
- 1991 - 1996MemberSuccessful five-year renewals, Site visits for all subspecialty programs, Department of Internal Medicine 
- 1991 - 1993MemberDevelopment Committee, Department of Internal Medicine 
- 1991 - 1993PresidentEducation Society, Mayo Clinic Rochester Societies 
- 1991MemberEducation Society, Mayo Clinic Rochester Societies 
- 1991 - presentMemberLymphoma Disease-Oriented Group, Division of Hematology, Department of Internal Medicine 
- 1990 - 1997MemberClinical Investigator Education Committee, Mayo Clinic Rochester Committees 
- 1989 - 1997MemberEducation Committee, Mayo Group Practices 
- 1989 - presentMemberAmerican Society of Hematology 
- 1988 - 1997ChairSubcommittee on Subspecialty Training, Department of Internal Medicine 
- 1988 - 1997MemberExecutive Committee, General Medical Training Committee, Department of Internal Medicine 
- 1988 - 1997MemberGraduate Education Committee, Internal Medicine and Medical Specialties, Mayo Graduate School of Medicine 
- 1987 - 1997MemberGeneral Medicine Training Subcommittee, Department of Internal Medicine 
- 1987 - 1991MemberPharmacy and Therapeutics Committee, Department of Pharmacy 
- 1987 - presentMemberHematology Research Section Committee, Division of Hematology, Department of Internal Medicine 
- 1986 - 2006MemberSubcommittee on Subspecialty Training, Department of Internal Medicine 
- 1986 - 1997MemberAssociation of Hematology/Oncology Program Directors 
- 1985 - 1997MemberHematology Education Committee, Division of Hematology, Department of Internal Medicine 
- 1985 - presentActive MemberEastern Cooperative Oncology Group 
- 1985 - presentMemberAmerican Medical Association 
- 1985 - presentMemberMinnesota Medical Association 
- 1985 - presentMemberZumbro Valley Medical Society, Minnesota Medical Association 
- 1985 - presentMemberLymphoma Steering Committee, Eastern Cooperative Oncology Group 
- 1985 - presentMemberLeukemia Steering Committee, Eastern Cooperative Oncology Group 
- 1985 - presentMemberEastern Cooperative Oncology Group 
- 1985 - presentMemberMinnesota Medical Association, American Medical Association 
- 1983 - 1985MemberSubcommittee to Second Year Medical Students, Subcommittee on Undergraduate Education, Department of Internal Medicine 
- 1982 - 1985MemberSubcommittee on Undergraduate Education, Department of Internal Medicine 
- 1980 - 1982MemberInternal Medicine Resident Graduate Education Committee, Department of Internal Medicine