[1] In his brief career in the late 1980s and early 1990s, Hertzog composed the soundtracks for two Jean-Claude Van Damme movies, Kickboxer and Bloodsport, as well as the scores for Breathing Fire and My Chauffeur.
Hertzog was a teacher at Hart High School in Santa Clarita, California, where he taught English and Music Theory.
After a nearly twenty-year hiatus, Hertzog released a CD titled Freeing the Waters in 2009.
[2] Early in 2015, Hertzog released a CD of new music, reminiscent of his work in "Bloodsport" and "Kickboxer," titled "Waking the Dragon."
The track listing for this limited edition version is as follows: Similarly to Bloodsport, the soundtrack to Kickboxer was remastered in 2006 and released by Perseverance Records.