Ab Koster held a professorship at the Hochschule für Musik und Theater in Hamburg from after he left the NDR Symphony Orchestra in 1990 until his retirement in 2019.
→ More information about the Hochschule für Musik und Theater Hamburg available here: https://www.hfmt-hamburg.de.
More than 60 students from his horn studio have won positions over the years in Germany and around the world.
Visit the horn studio Facebook page: http://www.facebook.com/HamburgerHornKlasse
Since September 1998, Ab Koster is also a permanent guest lecturer at the King’s Institute for Music in The Hague, Holland.