He appeared on PBS as a member of Sony Masterworks The American Tenors, a vocal trio created by Frank McNamara.
A 2002 Metropolitan Opera National Semi-Finalist, Granner trained at the University of Missouri–Kansas City conservatory where he graduated in vocal performance in 1996.
He made his operatic debut in 1998 as Ferrando in the Wolf Trap Opera Company production of Così fan tutte.
In 2005 Nathan Granner was awarded Alumnus of the year from UMKC Conservatory of Music and Dance In 2007 Granner/Bledsoe performed in Perm, Russia for the "Diaghilev Seasons Festival."
In 2014 he will perform the tenor roles in Astor Piazzolla's tango operita "Maria de Buenos Aires" in Szczecin, Poland.