Hymel made his professional debut in 1998 as the Philistine messenger in Samson et Dalila with the New Orleans Opera, a company where he has performed many roles, including Arturo in Lucia di Lammermoor, Luigi in Il tabarro, and Rinuccio in Gianni Schicchi. After his hometown debut, Hymel sang Tamino in Die Zauberflöte and the Duke in Rigoletto with Opera Grand Rapids. He made his European debut in 2007 at the Wexford Festival Opera, performing the role of the Prince in Dvorak’s Rusalka. Later that year he made his New York recital debut with Michelle DeYoung under the sponsorship of the George London Foundation. He has also sung at Carnegie Hall with Opera Orchestra of New York in a gala concert honoring the 100th performance there of Eve Queler that also featured Renée Fleming, Marcello Giordani, and Dolora Zajick.