Dr. Shekhar Saxena is a visiting professor at the Harvard T.H. Chan School of Public Health. A psychiatrist by training, he worked at the World Health Organization for 20 years holding the position of director of the department of mental health and substance abuse. His expertise includes providing advice and technical assistance to policymakers on prevention and management of mental, developmental, neurological, and substance use disorders and suicide prevention. He has authored more than 300 scientific papers, including in high impact journals.