Mark Harmon’s Net Worth Left His Family Stunned Mark Harmon’s Net Worth Left His Family Stunned after decades of steady success on NCIS and an illustrious Hollywood career that made him one of television’s highest earners. Known for portraying the stoic Leroy Jethro Gibbs, Harmon’s discipline both on and off screen has translated into remarkable financial success. His earnings from acting, producing, and various behind-the-scenes roles have quietly accumulated to an amount that shocked even thos