He is known for his roles as Joey Emerson on the Fox comedy-drama Roc (1991–94),[1] as Dr. Keith Wilkes on the CBS medical drama Chicago Hope,[2] and as NCIS Director Leon Vance on the CBS drama NCIS and its spin-offs Los Angeles and New Orleans.

Determined to further his knowledge of acting, he attended The Conservatory of Theatre Arts at Webster University in St. Louis, where he graduated with a B.F.A.

[4] After graduating, Carroll decided to test the waters by moving to New York City, the heart of the theater community.

The up-and-coming and talented young actor was allowed to recreate his role for the Broadway production of Wilson's critically acclaimed story The Piano Lesson.

[citation needed] In the fifth season of the CBS drama NCIS, Carroll was featured in a recurring role as Assistant Director Leon Vance.