His research is focused on health disparities due to race, gender, and class. With 14 years of research experience, Assari has published 190 peer-review papers. Assari is the Associate Editor of Frontiers in Public Health, Frontiers in Psychiatry, and Frontiers in Sociology. He has reviewed for top tier journals such as JAMA Internal Medicine. He has served on the Board of Directors of the American College of Epidemiology (ACE) and American Academy of Health Behaviors (AAHB). He is a Fellow of the New York Academy of Medicine (NYAM) and Society of Behavioral Medicine (SBM). He is currently the president of the Scientific for Public Health in Iran (SAPHIR).