Montana-born Thomas Clark holds degrees in German and French and was Fulbright Scholar to both Germany and France, studying at the University of Munich and teaching English at a French lycee in Metz, France. Coming to the San Francisco Bay Area, he taught German as a Teaching Assistant at the University of California, Berkeley, for 3 years.

From earliest childhood, he sang and played the piano, developing a keen interest in singing and performing. His love of opera led him to develop a passion for vocal theories when he sought a technique to make the switch from baritone to tenor. Frustrated at first after enormous work and disappointing results, this passion eventually led him to teacher Peter Gregg, a coach who had worked intensely with legendary Italian tenor Mario del Monaco. Gregg's unorthodox vocal technique from del Monaco, far different from conventional vocal methods, allowed Clark to finally make the switch after several years of having sung and performed as a baritone.

His first tenor role was Prince Hal in Plump Jack opposite the Composer, Gordon Getty, as Falstaff. His most recent performances include Siegmund in die Walküre, Loge in das Rheingold, Dick Johnson in La Fanciulla del West, Florestan in Fidelio, Cavaradossi in Tosca, Calaf in Turandot and Canio in I Pagliacci with Golden Gate Opera. He has studied with Peter Gregg, William Lewis, James King and Dietrich Erbelding.