 This was followed by a cerebrovascular fellowship at the Barrow Neurologic Institute in Phoenix, Arizona.He was the Assistant Professor of Neurological Surgery in the Department of Neurological Surgery at the UCI Medical Center, Irvine, California from 1998–2000.He began academic practice in neurosurgery in 1997 at the Neurosurgical Institute at Cedars-Sinai Medical Center in Los Angeles, California, USA.