In 2000, he was named Deputy Commissioner for Operations of the New York City Police Department where he directed the operational command center at Ground Zero during the attacks on 9/11. In 2006, Mayor (and now Senator) Cory Booker recruited Garry to lead the entire police department of Newark, New Jersey.
Garry was named as Superintendent of Police for the City of Chicago in 2011.
Biographical information from garryformayor.com.