As well as Necrophagist, Münzner played in Defeated Sanity from 1999 to 2002 and Obscura from 2008 to 2014, after which he left to co-found the extreme progressive metal supergroup Alkaloid.

"[3] Münzner joined Necrophagist in 2002, and wrote the solos to the Epitaph album, including songs like "Stabwound" and the title track.

[7] Shortly after leaving Necrophagist, Münzner joined Steffen Kummerer, Jeroen Paul Thesseling and Hannes Grossmann in Obscura, recording his first album with them, Cosmogenesis, in 2009.

[1] Münzner stated that a large reason for his departure from Necrophagist and eagerness to join Obscura was because of the freedom afforded to him by this band, particularly Steffen Kummerer who welcomed his contributions.

When writing for Obscura, Münzner stated that his main contributions were not so much in terms of songwriting, but generating riffs and solos for the band, which were then arranged by Grossmann.

During his time with Obscura, Münzner began developing focal dystonia, which prohibited some of his playing and made touring exhaustive.

Citing Obscura's extreme technicality and touring as a hindrance to this disease, Münzner decided to leave the band prior to the release of their fourth record.

Even though I regained most of my chops by now through re-training and Botox therapy, the condition is still there and I have to be very careful not to relapse and undo my progress by putting too much strain on my hand, which is why touring several months on an album cycle with material that brings me to the edge of my technical ability every night is not an option for me anymore in the near future.

"[9]After leaving Obscura, Münzner joined Morean, Danny Tunker, Linus Klausenitzer and Hannes Grossmann as the third guitarist, forming the progressive metal supergroup Alkaloid in 2014, and wrote two songs for their debut album, The Malkuth Grimoire.