who plays the director on ncis los angeles
List of NCIS: Los Angeles characters Leon Vance (portrayed by Rocky Carroll) is the Director of NCIS and also the person responsible for setting up the Office of Special Projects. He lives in Washington, D.C., and is a regular character on NCIS while also making regular guest appearances on NCIS: Los Angeles usually through video-conferences as well as making a few personal appearances at the OSP.
G. Callen G. Callen (born: Grisha Alekandrovich Nikolaev) is a fictional character in the show NCIS: Los Angeles portrayed by Chris O'Donnell. He is an NCIS Special Agent in Charge, and the senior agent assigned to the Office of Special Projects. O'Donnell made his first appearance during NCIS' sixth season episode "Legend (Part 1)".