Ms. Koontz has performed leading roles with the Chicago Symphony Orchestra, San Diego Opera, Central City Opera, & Opera on the Avalon. Her repertoire includes the roles of Violetta in La traviata, Alice Ford in Falstaff, Donna Anna in Don Giovanni, & the Countess in Le Nozze di Figaro.

Equally comfortable on the concert stage, she has performed as a soloist with the San Diego Symphony, La Jolla Symphony & Chorus, Chicago Arts Orchestra, Newfoundland Orchestra, Coeur d’Alene Symphony Orchestra, Spokane Symphony Orchestra.