John T. Posadas enjoys an active career as a performer and educator. Recitals have taken him across the country and abroad with appearances at the Kennedy Center, Tanglewood Music Festival, Aspen Music Festival, Santa Fe Opera, Grand Teton Music Festival, Cabrillo Festival of Contemporary Music, Forth Worth Chamber Music Society, and the Chautauqua Institute. His performances have been heard on NPR stations across the country.

As a chamber musician, he has won top prizes at the Fischoff Chamber Music Competition and is a founding member and the violist for the Baumer String Quartet. Orchestrally, he has performed with the Boston Symphony, Houston Symphony, Santa Fe Opera, the Mainly Mozart Festival Orchestra, the Naples Philharmonic, and the Chautauqua Symphony, among many others. JT joined the Utah Symphony as a member of the viola section in September 2020.

Before joining the Utah Symphony, he had been a resident artist and adjunct professor of viola and chamber music at the University of South Florida School of Music. A sought-after guest teacher and clinician, Posadas has taught masterclasses and lessons at institutions across America and abroad. Recent highlights include master classes and performances at the Boston University Tanglewood Institute, Utah State University, the University of Toronto, University of North Texas, Southern Methodist University, University of South Dakota, Concordia College, University of Florida, and the Cincinnati Conservatory of Music. For his extraordinary service in the arts, John was named an official Kentucky Colonel at the age of 13.