- 2022 - present
Vice ChairPTCOG
- 2022 - present
Associate AdvisorASTRO CPT
- 2022 - present
Vice Chair: pediatric brain tumorNCCN
- 2021 - present
Co - ChairICRU
- 2020 - present
PresidentParticle Therapy Cooperative Group - North America (PTCOG-NA)
- 2017
LecturerPediatric Radiation Oncology Teaching, Radiotherapy Students
- 2015 - present
ExaminerAmerican Board of Radiology
- 2014 - present
SecretaryParticle Therapy Cooperative Group - North America (PTCOG-NA)
- 2013 - present
Scientific CommitteePROS
- 2013 - present
Committee MemberAmerican Society of Therapeutic Radiation Oncology (ASTRO)
- 2013 - present
Editorial Board MemberInternational Journal of Particle Therapy
- 2012 - 2015
MemberMedical Physics Program Steering Committee Meeting
- 2012 - present
Scientific Committee MemberAmerican Society of Therapeutic Radiation Oncology (ASTRO)
- 2011 - present
Scientific Committee MemberSociety of Neuro-Oncology
- 2010 - 2017
MemberData Monitoring Committee
- 2010 - 2012
OfficerPediatric Radiation Oncology Society
- 2009 - 2010
MemberClinical Research Committee 3
- 2009 - present
Education CommitteePediatric Radiation Oncology Society
- 2009 - present
MemberProton Center Executive Committee
- 2009 - 2017
MemberClinical Operations Committee
- 2009 - 2011
Committee AuthorMedical Physics, GSBS
- 2008 - present
Scientific CommitteeSociety of Neurooncology
- 2008 - present
ModeratorPROS
- 2008 - present
OfficerPediatric Radiation Oncology Society
- 2007 - present
Society of Neurooncology
- 2007 - 2017
MemberIndia Sister Institution Committee
- 2007 - 2017
MemberGraduate Medical Education Committee
- 2007 - 2015
MemberPhysics Residency Committee
- 2006 - present
MemberPediatric Radiation Oncology Society
- 2006 - 2010
Alternate memberData Monitoring Committee
- 2005 - present
MemberResearch Medical Library Committee
- 2004 - 2017
MemberTexas Medical Association
- 2004 - present
MemberChildren's Cancer Survivors Study Group
- 2003 - present
MemberSociety of Neuro-Oncology
- 2003 - present
Board Member, Editorial BoardAmerican Journal of Clinical Oncology
- 2002 - 2003
MemberMy MD Anderson Committee for start up in the Division of Radiation Oncology
- 2002 - present
MemberRTOG: Radiation Oncology Therapy Group/NRG
- 2001 - present
MemberRadiation Safety Committee
- 2001 - present
MemberRadiation Safety Committee Subcommittee on Human Use
- 2000 - present
ReviewerAmerican Journal of Clinical Oncology
- 2000 - present
ReviewerInternational Journal of Radiation Oncology*Biology*Physics
- 2000 - present
ReviewerJournal of Clinical Oncology
- 2000 - present
ReviewerMedical Physics
- 1997 - present
MemberChildrens' Oncology Group
- 1996 - present
FellowRoyal College of Physicians and Surgeons of Canada
- 1996 - present
MemberAmerican Society of Therapeutic Radiation Oncology (ASTRO)
- 1995 - present
MemberResidency Training committee