- 2013Board MemberGE Healthcare's Comparative Effectiveness Research Advisory Board 
- 2013 - presentMemberMayo Clinic Research Committee, Mayo Clinic Committees 
- 2012 - presentMember for the Nominating CommitteeRadiological Society of North America (RSNA) 
- 2012MemberNominating Committee for the Alexander R Margulis Award for Scientific Excellence, Radiological Society of North America 
- 2008 - presentMemberMayo Clinic Center for Translational Science Activities 
- 2008 - presentMemberResearch Personnel Subcommittee, Mayo Clinic Research Committee, Mayo Clinic Committees 
- 2004 - presentChairSociety of NeuroInterventional Surgery 
- 2004 - presentMemberResearch Committee, Society of NeuroInterventional Surgery 
- 2003 - presentAssociate EditorRadiological Society of North America (RSNA) 
- 2003 - presentMemberResearch and Education Fund, Radiological Society of North America 
- 2002 - presentMayo Clinic College of Medicine and Science, Department of Education Administration 
- 2001 - 2002MemberAnimal Resource Center Advisory Committee, University of Virginia 
- 2001 - 2002MemberAnimal Care Committee, Animal Resource Center Advisory Committee, University of Virginia 
- 2001MemberSearch Committee, Vascular Biolgist, Department of Radiology, University of Virginia 
- 2001 - presentChairCorporate Sponsorship, Radiology Research Association 
- 2001 - presentMemberCorporate Sponsorship, Radiology Research Association 
- 2000 - 2005Interventional RepresentativeResearch Committee, American Society of Neuroradiology 
- 2000 - 2005MemberResearch Committee, American Society of Neuroradiology 
- 2000 - 2005Interventional RepresentativeCommittee for Evidence Based Medicine, American Society of Neuroradiology 
- 2000 - 2003MemberClinical Outcomes Subcommittee, Research Committee, American Society of Neuroradiology 
- 2000MemberSearch Committee, Thoracic Radiolgist, Department of Radiology, University of Virginia 
- 2000 - presentInterventional RepresentativeClinical Outcomes Subcommittee, Research Committee, American Society of Neuroradiology 
- 1999 - 2002Vice Chair for ResearchDepartment of Radiology, University of Virginia 
- 1999 - 2002MemberExecutive Committee, Department of Radiology, University of Virginia 
- 1999 - 2002MemberGroup Administrators' Committee, Department of Radiology, University of Virginia 
- 1999MemberSearch Committee, Molecular Imaging Scientist, Department of Radiology, University of Virginia 
- 1999 - presentMemberAmerican Society of Spine Radiology 
- 1997 - presentSenior MemberAmerican Society of Neuroradiology 
- 1997 - presentMemberAmerican Society of Neuroradiology 
- 1994 - presentMemberRadiological Society of North America 
-  Senior MemberSociety of NeuroInterventional Surgery 
-  Editorial Board MemberCochrane Back Review Group Associate Editorial Board Member