 As director of the Department, he argued that juveniles should not be punished as harshly, and that incentives are a better way to reduce juvenile misbehavior.In 2010, he became Commissioner of the New York City Department of Probation, a position he held until 2014, when he became a senior advisor to mayor Bill de Blasio in the New York City Mayor’s Office of Criminal Justice.From March 2014 to September 2015, he was senior adviser to Elizabeth Glazer, director of the Mayor's Office of Criminal Justice.