Born in Heidelberg, Bernhard Ostertag remained in Baden-Württemberg to study at the University of Music in Freiburg.
He attended masterclasses with internationally leading artists in their field such as David Hickman, Thierry Caens and Håkan Hardenberger. During his student days he played in the Junge Deutsche Philharmonie and the Schleswig-Holstein Musik Festival Orchestra.
After several years as a regular guest, Bernhard Ostertag became a permanent member of The Deutsche Kammerphilharmonie Bremen in 2002.
He generally likes to broaden his horizons: musically as a guest with numerous other orchestras, but also through various non-musical challenges.
His mathematical and scientific interests focus on astronomy and astrophysics.