 Tanner has also sung Calaf at many major opera houses in Germany plus, in 2006, he sang the role at the Maggio Musicale Fiorentino under the direction of Zubin Mehta and toured with that festival organization to Japan for several more performances.On the concert stage Tanner has performed as soloist with many symphony orchestras including the St. Louis and Atlanta Symphonies, and the Roanoke and West Virginia Symphony orchestras in Verdi's "Requiem".Tanner sang "O Holy Night" at the Christmas Tree lighting ceremony at the White House in 2004.