Ferriter graduated from The Citadel with a Bachelor of Science degree in Business Administration in May 1979, and was commissioned in the infantry as a Second Lieutenant. After the Infantry Officer Basic Course, his first troop assignment was with the 2d Battalion, 16th Infantry, at Fort Riley, Kansas, where he commanded a weapons platoon and a support platoon, and then became S4 (Logistics) on the battalion staff.[3]
After attending the Infantry Officer Advanced Course at Fort Benning, Georgia, from April to October 1983, he became Assistant S3 (Operations) on the staff of the 6th Battalion, 327th Infantry at Fort Wainwright, Alaska, and then commander of its C Company. He was posted to Fort Lewis, Washington, in October 1986, where he was S5 (Civil Military Operations) and then S1 (Personnel) on the staff of the 2nd Battalion, 75th Ranger Regiment, and then commander of its B Company. This was followed in July 1989 by service as S3 (Operations), on the staff of the 4th Battalion, 23d Infantry (Mechanized), which was part of the 9th Infantry Division, but still based at Fort Lewis.[3]
Ferriter attended the United States Army Command and General Staff College at Fort Leavenworth, Kansas, between July 1989 and July 1990. He then became the Regiment S5 (Civil Military Operations) of the 75th Ranger Regiment at Fort Benning. After a time as S3 (Operations), on the staff of the 3d Battalion, he became the Regiment S3 (Operations). In this capacity, he participated in Operation Restore Hope in Somalia. He commanded the 2d Battalion, 504th Parachute Infantry of the 82d Airborne Division at Fort Bragg, North Carolina, from November 1994 to June 1996 and the 3d Battalion, 75th Ranger Regiment at Fort Benning from July 1996 to June 1998.[3]
Ferriter was deputy commanding general (operations) of the XVIII Airborne Corps at Fort Bragg from August 2007 until January 2008, when he returned to Iraq for a second tour as deputy commanding general (operations) of the Multi-National Corps – Iraq, again returning to duty as deputy commanding general (operations) of the XVIII Airborne Corps at Fort Bragg in April 2009. In June 2009 he became commanding general of the United States Army Infantry Center and commandant of the United States Army Infantry School at Fort Benning. This was followed by duty as commanding general of the United States Army Maneuver Center of Excellence there from October 2009 to November 2010.[3]
[5] "The Ferriters are a great Army Family," noted the Chief of Staff of the United States Army, GeneralRaymond T. Odierno "and IMCOM is fortunate to have them. As IMCOM Commander, Ferriter is quoted as saying "Always remember that the strength of our nation is our Army. The strength of our Army is our soldiers. The strength of our soldiers is our Families. And that’s what makes us Army Strong."[6]