In 2006, Forbach joined the
Las Vegas cast of
The Phantom of the Opera understudying the roles of
Raoul and Monsieur Reyer. In 2009, Forbach played the dual role of
Rapunzel's Prince and
The Wolf in
Into the Woods at the
Wells Fargo Pavilion. In 2012, Forbach joined the 25th Anniversary national tour cast of
Les Misérables as Feuilly and an
understudy for
Enjolras. He later took over the role of Enjolras playing opposite his real-life husband Joseph Spieldenner as
Grantaire until the tour closed. In 2013, he received acclaim for his performance as Chris Scott in the
North Shore Music Theatre production of
Miss Saigon. In March 2014, Forbach returned to
Les Misérables in the second
Broadway revival. Once again playing Feuilly and understudying
Enjolras. He briefly took over the role of Enjolras again in October 2014 and left the role in November of that same year. He continued with the production playing Feuilly and the Factory Foreman. In 2020, his one-hour
period drama TV pilot
Brooklyn Pansy was named a Grand Prize Winner in the WeScreenplay Spring 2020 Diverse Voices Screenwriting Lab. In 2022, Forbach joined the
New York City Center Encores! production of
Into the Woods as the male
swing. He would end up going on for Rapunzel's Prince for a majority of the run when
Jordan Donica was sick. On February 23, he went on for the Baker last second for the second act of the production's preview performance at the
Kennedy Center in Washington D.C., he would then proceed to open the show's engagement as the Baker that weekend and play the role for the majority of the performances at the Kennedy Center while Arcelus was recovering from an injury.
Andy Karl and understudies Sam Simahk and Eddie Lopez played Rapunzel's Prince in his place. On February 28, Forbach announced on his Instagram stories he'd be playing the Baker during the 6-day absence of Arcelus at the
Emerson Colonial Theatre in
Boston, Massachusetts. Simahk played Rapunzel's Prince in his place. He also played the Baker during the production's closing weekend at the
Tennessee Performing Arts Center in
Nashville, Tennessee with Lopez playing Rapunzel's Prince in his place. In 2024, it was announced that Forbach will make his film directorial debut with the short thriller film
The Delicate Medium from a screenplay he wrote. Production was originally set to begin in the summer of 2025, but was postponed to 2026. Since
Into the Woods, Forbach has joined the Broadway casts of
A Wonderful World which opened in October 2024, and
Ragtime opened in October 2025. ==Personal life==