When he was at BYU, Glenn was part of the Concert Choir under Mack Wilberg and the BYU Singers under the direction of Ronald Staheli. After his mission he reevaluated his previous track as a Jazz singer and decided to start his operatic studies with Doug Bush. During his doctoral studies he was selected for an opera training program through the San Fransisco Opera, when he received the two-year Adler Fellowship. He debuted in 2004 and has since sung in a number of operas and venues.
He received a 2012 Grammy Award, along with several of his musical colleagues for their recording of Doctor Atomic, a contemporary opera by John Adams and Peter Sellars. Using documents from the time period to create the story, the opera chronicles the creation of the atomic bomb. Glenn portrayed the lead tenor role. In 2013, he presented a master class and a recital at BYU.
- BYU Magazine - And the Grammy goes to... (Spring 2012)
- BYU Magazine - Encyclopedia of Musical Alumni (28 December 2007)