- 2015 - presentChair, Animals Work GroupTranslational Neuroscience Subcommittee, American Academy of Neurology 
- 2013 - 2016Translational Neuroscience SubcommitteeAmerican Academy of Neurology 
- 2013 - 2015Chair, Neuroscience Subcommittee, Community of PracticeFederation of Clinical Immunology Societies 
- 2013 - presentChairNeuroscience Subcommittee, Community of Practice 
- 2012 - presentInaugural MemberFederation of Clinical Immunology Societies 
- 2008 - presentHonorary MemberAmerican Association of Neuromuscular and Electrodiagnostic Medicine 
- 2002 - presentMemberHeritage Committee, Department of Neurology 
- 1999 - presentMemberTelethon Peer Reviewer Group, Comitato Telethon Fondazione 
- 1998ChairOther Immune Mediated Neuromuscular Disorders (LEMS and Neuromyotonia), IX International Congress on Neuromuscular Diseases 
- 1998ChairAntibody Mediated Channelopathies at the Neuromuscular Junction, IX International Congress on Neuromuscular Diseases 
- 1996 - 1997MemberAcademic Appointment and Promotions Committee, Mayo Clinic Rochester Committees 
- 1996 - presentMember: Research and Grants CommitteeNational Myasthenia Gravis Foundation 
- 1996 - presentMemberAssociation of Medical Laboratory Immunologists 
- 1996 - presentMemberAmerican Association of Medical Laboratory Immunologists 
- 1995Ad Hoc ReviewerPsychobiological, Biological and Neuroscience Subcommittee, Mental Health AIDS and Immunology Review Committee 
- 1995 - presentMemberCoordinator, Neuroimmunology Video Teleconferences, Department of Neurology 
- 1993ChairSymposium on Cross-Talk Between Nervous and Immune Systems in Response to Injury, 5th International Symposium on Neural Regeneration 
- 1993 - 1996MemberAcademic Promotions Committee, Department of Neurology 
- 1993MemberResearch Award Committee, Department of Neurology 
- 1992ChairWorkshop #109 "Immunology of Neuromuscular Disease", 8th International Congress of Immunology 
- 1992 - 1993Neurology C Study SectionNational Institutes of Health 
- 1992 - 1993MemberNeurology C Study Section, National Institutes of Health 
- 1992Co-ChairMyasthenia Gravis and Related Disorders: Experimental and Clinical Aspect, New York Academy of Sciences 
- 1991MemberAdvisory Committee, Clinical Research Center 
- 1991MemberInternational Program Committee, Third International Congress of Neuroimmunology 
- 1991 - presentMemberClinical Immunology Society 
- 1990 - 1996Chair, Research and Grants CommitteeNational Myasthenia Gravis Foundation 
- 1990 - 1996ChairResearch and Grants Committee, Myasthenia Gravis Foundation of America 
- 1990 - 1991MemberResearch and Development Committee, Department of Laboratory Medicine and Pathology 
- 1990 - presentMemberResearch and Grants Committee, Myasthenia Gravis Foundation of America 
- 1989 - 1994MemberResearch Committee, Department of Neurology 
- 1987 - presentMemberDivision of Clinical Biochemistry & Immunology, Department of Laboratory Medicine and Pathology 
- 1986 - presentMemberMinnesota Society of Neurological Sciences 
- 1985 - 1992MemberResearch Committee on Neuroimmunology, World Federation of Neurology 
- 1985 - 1990Advisory Committee on Fundamental ResearchNational Multiple Sclerosis Society 
- 1985 - 1990MemberAdvisory Committee on Fundamental Research Related to Multiple Sclerosis, National Multiple Sclerosis Society 
- 1985 - 1986MemberClinical Immunology Liaison Group, Department of Laboratory Medicine and Pathology 
- 1985 - 1986Member, Executive CommitteeMinnesota Council on Biotechnology, Department of Energy and Economic Development 
- 1984MemberPublications Committee, American Society for Neurochemistry 
- 1984MemberEducation Committee, American Society for Neurochemistry 
- 1984 - presentMemberAmerican Society for Clinical Investigation 
- 1983 - 1988MemberResident Selection Committee, Department of Neurology 
- 1983 - 1988MemberGraduate Degrees Program Committee, Department of Neurology 
- 1983 - 1984ChairMayo Laboratory Society, Mayo Clinic Rochester Societies 
- 1983 - 1984MemberMedical School Admissions Committee, Mayo Clinic Rochester Committees 
- 1983 - 1984ChairMayo Clinic Laboratory Society 
- 1983 - presentResearch Committee of Neuroimmunology,World Federation of Neurology 
- 1982MemberClinical Immunology Planning Committee, Department of Immunology 
- 1981Site VisitorSite Visit, National Institutes of Health 
- 1981 - 1982MemberClinical Practice Committee, Department of Neurology 
- 1980 - 1984SecretarySouthern Minnesota Chapter, Society for Neuroscience 
- 1980MemberEducation Committee, Department of Neurology 
- 1980 - presentMemberAmerican Society for Neurochemistry 
- 1979 - presentMedical Advisory Board - MemberNational Myasthenia Gravis Foundation 
- 1979 - presentMedical Advisory Board - MemberMinnesota Chapter, Myasthenia Gravis Foundation 
- 1979 - presentMemberMinnesota Chapter, Myasthenia Gravis Foundation of America 
- 1979 - presentMemberMyasthenia Gravis Foundation of America 
- 1979 - presentMemberAssociation of Minnesotan Immunologists 
- 1978Site VisitorSite Visit, National Institutes of Health 
- 1978Site VisitorSite Visit, National Institutes of Health 
- 1978 - 1987MemberTissue Culture Association 
- 1978 - presentMemberSigma Xi, The Scientific Research Society 
- 1977 - 1989MemberAmerican Association of Neuropathologists 
- 1976 - presentMemberAmerican Academy of Neurology 
- 1976 - presentMemberSociety for Neuroscience 
- 1974 - presentMemberAmerican Association of Immunologists