Quantock began his Army career as a
second lieutenant with the 558th Military Police Company at Kriegsfeld Army Depot (North Point) Germany. His career continued as an officer with various leadership assignments including Commander of 504th Military Police Battalion, Commander of the
16th Military Police Brigade, Commandant, United States Army Military Police School, Fort Leonard Wood, Missouri,
Provost Marshal General of the United States Army and Commander of the
United States Army Criminal Investigation Command. Quantock's deployments include
Operation Island Breeze (
Grenada),
Operation Uphold Democracy and
Operation Restore Democracy (
Haiti), and
Operation Iraqi Freedom (
Iraq).
Abu Ghraib After the
Abu Ghraib incident, in early 2004, then Colonel Quantock was called in as commander of the
16th Military Police Brigade to relieve the 800th Military Police Brigade. Quantock relieved Brigadier General
Janis Karpinski on 14 January 2004, and was given responsibility to break down and rebuild the Abu Ghraib prison during the sensitive media frenzy that followed the revelations of abuse by members of the 800th. ==Personal life and education==