Dr. Mirzaei spent his childhood and adolescence in Mashhad, Iran. When he was 18 years old, he moved to Austria to study medicine at the University of Vienna. He graduated in 1987 and after some experimental jobs such as at the Department of Experimental Anesthesiology of the Vienna General Hospital he moved, in 1989, to Luxembourg to continue his postdoctoral education at the Department of Cardiology and the Department of Infectious Diseases of the Centre Hospitalier de Luxembourg. In 1994 he completed his specialist training in Family Medicine at the Kaiserin Elisabeth Hospital in Vienna and received the Board Certification in General Medicine. In 1994, he changed to Wilhelminen Hospital in Vienna to complete his specialist medical training in Nuclear Medicine which he was certified for in 1998. In the same year, Mirzaei went to Heidelberg, Germany for a research sabbatical at the Department of Endocrinology of the Ruprecht-Karls-University and afterwards he started to work as Staff Physician at the Wilhelminen Hospital Vienna. In 2004, Mirzaei was appointed professor for Nuclear Medicine at the University of Vienna. Since 2007, he has been Head of the Department of Nuclear Medicine at the Wilhelminen Hospital Vienna.