Member, Editorial Board, Pediatrician (Publisher, S. Karger, Basel) Switzerland. Recipient of American College of Cardiology Young Investigators Competition Award, Washington D. C., Feb 1971. Instructor in pediatric cardiology, Kansas University Medical Center, Kansas City, Kansas, 1971 July, Dec 1971. Assistant Professor in Pediatrics, Pediatric Cardiology and Assistant Professor in Medicine, Rush-Presbyterian St. Luke’s Medical Center. Chicago, Illinois, 1972 Jan -1974. Acting Director of the EKG Laboratory, Rush Presbyterian-St. Luke’s Medical Center, Chicago, Illinois, 1972-74. Chief of Section of Pediatric Cardiology, Queen Pahlavi Cardiovascular Center, Tehran, Iran, Jan 1974- July 1984. Professor of Pediatric Cardiology, at Heart Hospital, Iran School of Medical Sciences, Tehran 1986-2007Director Department of Pediatric Cardiology. Former Director of Electrophysiology Laboratory, Director of Noninvasive Electrophysiology Laboratory, Day General Hospital, Tehran, Iran, 1986-Continuing.