Spinal cord injury Rehab. center, in charge of a clinic in Vali-Asr Hospital 1983-1987 Member of Iranian Physiotherapy Association 1983-Present. Lecturer in Physiotherapy and charge of out-patient clinic Tehran University of Medical Sciences, School of Rehabilitation., 1987-1992 Member of Board of Rehabilitation Sciences (Ministry of Health). 1988-1992 Ph.D. Electrophysiological studies of spinal reflex pathways from group II muscle afferents. Glasgow University, IBLS, NBS, UK. Glasgow University, IBLS, NBS, UK, 1992-1997 Member of Iranian Physiology and Pharmacology Association 1997-Present Assistant Professor, Tehran University of Medical Sciences, School of Rehabilitation., 1997-2002 Associate Professor, Tehran University of Medical Sciences, Faculty of Rehabilitation., 2002-2007 Vice Dean for Education & Research Affairs. Tehran University of Medical Sciences, Faculty of Rehabilitation., 1997-2010 Professor, (2010-2017 Member of Academic Board of Rehabilitation (Ministry of Health) 2000-2007 Member of Academic Board of Physiotherapy, Orthoses, and prosthesis (Ministry of Health) 2007-Present. Founder Member of Sports Medicine Research Center of TUMS. 2002-2007 Member of the Education Council of TUMS, 1997-2010. Member of the Research Council of TUMS, 1997-2010. Head of Physical therapy and Rehabilitation ward. Imam Khomeini Complex Hospital 2006, 2014 Founder Member and member of Research Council at Brain and Spinal Injury Research center, Imam Khomeini Hospital. 2007-2020 Member of Board of Federation of Sports Medicine (I.R. IRAN) 2006-2015 Dean for Postgraduate Studies, International Campus (TUMS-IC) 2011-2013 , 2008 Dean for Postgraduate Studies; Vice President for Research Affairs (ICTUMS), Vice President for Research Affairs, International Campus (TUMS-IC,2013-2017 ; Dean, School of Rehabilitation, TUMS, 2017-2021(October).)