American Board for Certification: Orthotic Examiner, 1982; Prosthetic Examiner, 1982-1985; Board Member, 1995-2001, ABC Representative to ISPO Education Committee, 1996-2000, Chairman, Licensure Task Force 2000-2002, Chairman, Credential Development Committee, 2002-2005
American Academy of Orthotists and Prosthetists: Member, 1974 to present, Fellow, 2001 to present; Chairperson, Continuing Education, 1984-1986; Member Board and Officer: 1986-1991; President, 1990-91; Chairman, Scientific Symposium American Academy of Orthotists and Prosthetists Annual Meeting, 1987 and 1988
Academy College Fund - Board of Trustees: Trustee, 1990 to 2001; Vice-Chair, 1995-97
Association of Children's Prosthetic Orthotic Clinics: Member, 1991 to present, Nominations Committee '95 & '98
Commission on Accreditation of Allied Health Education Programs: Commissioner, 1994-1996; Nomination Committee, 1994-96
International Society for Prosthetics and Orthotics, U.S. National Member Society: Member, 1983 to present; Board of Directors, 1991 to 2002, and 2011 to 2014; Secretary, 1993-95, Chairman, 1995-99, Chair Emeritus 1999 to 2002,
International Society for Prosthetics and Orthotics: Protocol Committee Member & Elections Officer, 2011 to 2015, Member of Executive Board, Treasurer & Chair Finance Committee 2015 to 2019
National Association for the Advancement of Orthotics & Prosthetics: Member, 2009 to present
National Commission on Orthotic and Prosthetic Education: Commissioner, 1991-1994; Chairman, Residency Development Committee, 1992-1994
Journal of Rehabilitation Research & Development: Editorial Board, March 1991-1997
RESNA: Member 1989 to 2002, Member, Quality Assurance Committee 1992-1995
Commission on Accreditation of Rehabilitation Facilities: Trustee 1998-2004
Illinois Orthotic, Prosthetic & Pedorthic Licensure Board: Member, 2000-2012, Vice Chair 2005-2007, Chair 2007-2012, Member, Center for Medicare/Medicaid Services’ Negotiated Rules Committee, 2002 & 2003
US/USSR Conference on Below Knee Prosthetics, Faculty Member, Moscow, USSR, March 1989.
1989 Myoelectric Controls Course and Symposium, Visiting Professor, University of New Brunswick, Fredericton, New Brunswick, Canada, August 21-25, 1989.
VI World Congress of ISPO, Instructional Course Presenter, Kobe, Japan, November, 1989.
Invaltech '90, U.S. Program Chairman, US-USSR Rehabilitation Conference, Moscow, USSR, April 1990.
Commission on Disabilities, Delegate by the U.S. Department of State to the US-USSR Leadership Conference sponsored by American Center for International Leadership, "Beyond Chautauqua: The Road to New Relationships" Conference, Moscow, USSR, September, 1991.
VII World Congress of ISPO, Instructional & Manufacturers Course Organizer, Chicago, Illinois, June 28-July 3, 1992.
Caribbean Rim '93 Scientific Symposium, U.S.-I.S.P.O. Member Society / Association of Prosthetic and Orthotics Republic of Mexico, Conference Co-organizer, Cancun, Mexico, January 28-30, 1993.
World Rehabilitation Fund, Inc. / American University in Beirut Prosthetics/Orthotics Rehabilitation Course, Faculty Member, Nicosia, Cyprus, April 5-16, 1993.
Consensus Conference on the "Lower Limb Orthotics Management of Cerebral Palsy", U.S. Conference Coordinator, Duke University, Raleigh/Durham, North Carolina, November 9-13, 1994.
Caribbean Rim '95 Scientific Symposium, U.S.-I.S.P.O. Member Society / Association of Prosthetic and Orthotics Republic of Mexico, Conference Co-organizer, Cozumel, Mexico, January 26-29, 1995.
1995 Myoelectric Controls Course and Symposium, Keynote Speaker, University of New Brunswick, Fredericton, New Brunswick, Canada, August 14-17,1995.
People and Health Conference, Keynote Speaker, Saint Petersburg, Russia, December 2-5, 1996.
Transradial Myoelectric Prostheses Course, Visiting Professor, National School for Prosthetics Orthotics, Tokorozawa, Japan, March 1997 & November 1997.
Japanese Society for Prosthetics and Orthotics, Annual Meeting, Keynote Speaker, Tokyo, Japan, November 23, 1997.
IX World Congress of ISPO, Instructional Course & Symposium Presenter, Amsterdam, The Netherlands, June 28 - July 3, 1998.
International Society for Prosthetics and Orthotics / US-ISPO “Team Management of Cerebral Palsy,” Chairman & Conference Co-organizer, Texas Scottish Rite Hospital, Dallas, Texas, November 11-13, 1999.
X World Congress of ISPO, Symposium Presenter, Glasgow, Scotland, June 30 - July 6, 2001.
Orthopädie + Reha-Technik, Instructional Course Presenter, Leipzig, Germany, May 2002
Rehabilitation Engineering Research Center’s State of the Science Conference, Advisory Committee Member, Center for International Rehabilitation, Chicago, Illinois, August 17-18, 2006
5th Central European ISPO Conference, United States Representative, Portoroz, Slovenia, September 18-20, 2008
Foros Unidos de las Américas, Moderator & Symposium Presenter, San José, Costa Rica, February 13-16, 2011
Sociedad Mexicana de Ortesistas y Protesistas, AC, “Actualización en Prótesis para Miembro Superior”, Visiting Professor, Puebla, Mexico, May 19-21, 2011
ISPO Africa Congress, ISPO South Africa, Moderator & Symposium Presenter, Sun City, South Africa, September 18-21, 2011
PacRim 2012 Conference, U.S.-I.S.P.O. National Member Society, Conference Chair & Symposium Presenter, Honolulu, Hawaii, January 22-25, 2012
PacRim 2014 Conference, U.S.-I.S.P.O. National Member Society, Conference Chairman & Presenter, Waukoloa, HI, USA, January 26-29, 2014
6th Uniendo Fronteras/US-ISPO Conference, Conference Co-Chair, Quito Ecuador, October 18-22, 2014
ISPO 2015 World Congress, Executive Committee, Lyon, France, June 19-24, 2015
PacRim 2016 Conference, U.S.-I.S.P.O., Conference Chairman, Kaua’i, HI, USA, January 21-24, 2016
Asian Prosthetic Orthotic Scientific Meeting, Symposium Keynote Presenter, Seoul, South Korea, November 2-5, 2016
ISPO 2017 World Congress, Executive Committee & World Congress Committee, Cape Town South Africa, May 5-11, 2017
7th Central European ISPO Conference, Symposium Keynote Presenter, Portoroz, Slovenia, September 20-22, 2018
American Orthotic Prosthetic Association Annual Meeting, Symposium Presenter & ISPO Representative, Vancouver, B.C., Canada, September 27-29, 2018
Asian Prosthetic Orthotic Scientific Meeting, Instructional Course Presenter, Bangkok, Thailand, November 7-9, 2018
8th Uniendo Fronteras Conference, Keynote Speaker & ISPO Representative, Antigua, Guatemala, April 28-May 1, 2019
9th Jornadas Interdisciplinasias Sobre Tecnologías en Equipamiento y Rehabilitación, Keynote Speaker & ISPO Representative, Buenos Aires, Argentina, June 6-8, 2019
ISPO 2019 World Congress, Executive Committee & World Congress Committee, Kobe, Japan, October 5-8, 2019
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