Koelman studied the violin with Jan Bor and
Herman Krebbers in Amsterdam. From the age of 18, he studied with
Jascha Heifetz on a full scholarship at the University of Southern California School of Music, now known as the
USC Thornton School of Music, in Los Angeles. From 1996 until 1999 he was first
concertmaster of the
Royal Concertgebouw Orchestra in Amsterdam. 2000-2005 he was Professor for violin and chamber music at the Robert Schumann Hochschule in Düsseldorf, Germany. Currently (since 1987) he is Professor for violin and chamber music at the "
Zürcher Hochschule der Künste" (ZHdK) known as
Zurich University of the Arts in Switzerland where he also leads the
ZHdK Strings chamber orchestra. He is frequently invited as a jury member at international violin competitions and gives masterclasses all around Europe, Asia and Australia.
1984–1989 Professor for Violin and chamber music at the Landeskonservatorium für Vorarlberg in Bregenz & Feldkich, Austria.
2000–2005 Professor for Violin and chamber music at the
Robert Schumann Hochschule in Düsseldorf, Germany. (Professor title and chair for life)
Since 1987 Professor for violin and chamber music and leader of the ZHdK Strings Orchestra at the
Zurich University of the Arts in Switzerland. (Professor title and chair for life)
Masterclasses at institutions such as: Aurora Sweden, Australian National Academy of Music in Melbourne, Griffith University in Brisbane, International Holland Music Sessions,
Keshet Eilon Israel,
Conservatorio Vincenzo Bellini Palermo, Perth University, Porto Carras in Greece,
Silkroad Summer Sessions,
Sweelinck Conservatorium Amsterdam, Sydney Conservatory, Thessaloniki Conservatory, Western Australian Academy of Performing Arts and many more.
Online Master Teacher at iClassical Academy with whom he has recorded several online Masterclasses.[1]
Niccolò Paganini: Violin concerto's No.1 & No.2, Netherlands Symphony Orchestra/Jan Willem de Vriend Challenge Classics CC72343 Winner of Edison Award for most popular classical album in the Netherlands, 2010