Kreis's debut album, One of the Ones, was released on November 17, 2005, and was accompanied by an appearance on a special Sirius XM's edition of The Apprentice.
He followed his debut album with The Gospel According to Levi, confronting religion and its unhealthy views on sexuality, specifically as it relates to the LGBT community and conversion therapy (Kreis did six years with Exodus International).
In addition to Kreis's early musical activism, his compositions have been featured on Days of Our Lives, Young and the Restless, The Vampire Diaries, Sons of Anarchy, So You Think You Can Dance, Mob Wives, and films The War Room and Kiss the Bride.
He also played opposite Matthew McConaughey with the role of Adam Meiks in Bill Paxton's directorial debut Frailty.
The producers of One Red Flower: Letters from 'Nam later sought Kreis to portray Jerry Lee Lewis in the Broadway musical Million Dollar Quartet.
[3] In the May 2010 edition of The Rage Monthly, a San Diego gay lifestyle magazine, Kreis answered questions from the author Bill Biss about coming out, saying: I think it was the first of many moves toward me dispelling what I call the illusion of limitation.