Leroy Jethro Gibbs is a fictional character from the CBS Television series "NCIS", played by Mark Harmon. He is an ex-Scout Sniper for the United States Marines turned Special agent. He commands a team for the Naval Criminal Investigative Service. Gibbs is the most skilled marksman on the team. He is the most skilled at handling violent situations. He is also a skilled interrogator. Gibbs is a natural leader who always accomplishes his mission. 