In 2000 Wolfgang Seifen was appointed professor of improvisation at the Universität der Künste in Berlin, and in 2004 he was appointed the organist of the Kaiser Wilhelm Memorial Church in Berlin.
Full bio. You can hear him on Spotify.
He has his own channel on YouTube:
Suite in French Style – Marienbasilika – Kevelaer
Wolfgang Seifen and Ensemble “Virga Strata”
Gregorian Chant and Organ Improvisation
Wolfgang Seifen Improvises, Live Concert
Wolfgang Seifen improvises in a live concert at Holy Ghost Church in Mannheim, Germany.