- 2018 - 2019
ChairRules Committee, American Society of Neuroradiology
- 2013 - present
MemberEducation Committee, American Society of Neuroradiology
- 2009 - 2013
MemberHealth Policy Committee, Quality, Safety & Value Committee, American Society of Neuroradiology
- 2009 - 2012
MemberAppropriateness, Utilization and Quality CPC Subcommittee, American Society of Neuroradiology
- 2008 - 2012
MemberAmerican Board of Radiology, Neuroradiology MOC Exam Review and Angoff Evaluation
- 2008 - present
MemberAmerican Board of Radiology
- 2008 - present
MemberAmerican Board of Radiology, Neuroradiology Self Assessment Module Review
- 2003
MemberAssociation of Program Directors in Radiology
- 2002 - 2006
MemberCommittee for Evidence Based Medicine, American Society of Neuroradiology
- 2002 - 2005
CouncilorAmerican College of Radiology, American Society of Neuroradiology
- 2002 - 2005
Executive Committee MemberAmerican Society of Neuroradiology
- 2002
Honorary MemberSociedad Argentina de Radiologia
- 2001 - 2005
ChairAd Hoc Committee on the AFIP, Association of Program Directors in Radiology
- 2001 - 2002
Elected PositionAlternate Councilor to the American College of Radiology, American Society of Neuroradiology
- 2000 - 2006
MemberAudiovisual Committee, American Society of Neuroradiology
- 2000 - 2001
ChairAudit Committee, American Society of Neuroradiology
- 2000
JudgeAnnual Meeting Scientific Exhibits, American Roentgen Ray Society
- 1999 - 2006
MemberScientific Exhibits Committee, American Society of Neuroradiology
- 1999 - 2004
EditorNeuroradiology Learning Disk, American College of Radiology
- 1999
MemberIntersociety Commission, American College of Radiology
- 1999
Honorary MemberSociedad Chilena de Radiologia
- 1998 - 2001
MemberAudit Committee, American Society of Neuroradiology
- 1998 - 1999
MemberProgram Committee, American Society of Spine Radiology
- 1998
MemberLearning File Development Committee, American College of Radiology
- 1994
MemberSan Diego Radiological Society
- 1994 - present
MemberAmerican Society of Head and Neck Radiology
- 1994 - present
MemberAmerican Society of Spine Radiology
- 1993 - 2006
MemberWestern Neuroradiology Society
- 1993 - 1996
MemberAmerican Medical Association
- 1992 - 1993
MemberSan Francisco Radiological Society
- 1992 - present
Active MemberAmerican College of Radiology
- 1992 - present
Senior MemberAmerican Society of Neuroradiology
- 1991 - present
MemberAmerican Society of Neuroradiology
- 1989 - 1990
MemberSan Diego Radiological Society
- 1986 - 2020
MemberAmerican Roentgen Ray Society
- 1986 - present
MemberAmerican College of Radiology
- 1986 - present
MemberRadiological Society of North America
- 1984 - 1986
MemberAerospace Medical Association
- 1984 - 1986
MemberAssociation of Military Surgeons of the United States
- 1978
Charter PresidentAlpha Epsilon Delta Honor Society
- 1977
Vice ChairUniversity of Memphis, IEEE Student Branch, Institute of Electrical and Electronics Engineers
- 1976 - 1977
TreasurerAlpha Epsilon Delta Honor Society