That same year she made her debut at the Nashville Opera as Pamina in "The Magic Flute". In 2015 Zetlan created roles in two world premieres: Fanny in Ricky Ian Gordon's "Morning Star" at the Cincinnati Opera and the Messenger in Matthew Aucoin's "Crossing" with the American Repertory Theater. Also in 2015, she performed the role of Despina in "Così fan tutte" with the Milwaukee Symphony Orchestra.