Thomas Roland Insel is an American neuroscientist, psychiatrist, entrepreneur, and author who led the National Institute of Mental Health from 2002 until November 2015. Prior to becoming Director of NIMH, he was the founding Director of the Center for Behavioral Neuroscience at Emory University in Atlanta, Georgia. After leaving NIMH, he worked with various companies and organizations focused on mental health technology, making significant contributions to the field.