He is also Associate Principal Horn of the Houston Symphony, and Principal Horn of the Chautauqua Symphony at the historic Chautauqua Institution in up-state New York. He has appeared as a soloist with many orchestras in the United States, Canada and Mexico, and has lectured and performed for the In-ternational Horn Society. Kaza has made a specialty of investigating the natural acoustics of western canyons, and played his horn in Grand Canyon, Santa Elena Canyon, Black Canyon, and many others.