Meitner first came into contact with the acting profession when his parents applied to him at the age of seven, without his knowledge, on the ZDF television show Lass Dich Surprise with Thomas Ohrner.
There he was allowed to meet his then idol Jan Fedder, the actor of Dirk Matthies in the ARD evening series Großstadtrevier.
After a successful casting, he played the role of Zettel in the children's and youth television series Ein Fall für B.A.R.Z.
Since October 2013 he has been studying acting at the Hochschule für Schauspielkunst "Ernst Busch" Berlin.
From 2017 to 2021 he played in the ZDF crime series Der Alte as Lenny Wandmann after the age-related departure of Michael Ande next to Stephanie Stumph and Ludwig Blochberger the third co-investigator at the side of the old Jan-Gregor Kremp.