He has worked with Louis Sclavis, Derek Bailey, Han Bennink, Misha Mengelberg, Gerry Hemingway, Yo-Yo Ma, Albert Mangelsdorff, Franco D'Andrea, Joëlle Léandre, Georg Gräwe, Trilok Gurtu, and Mola Sylla, and has done several world music projects working with musicians from Sardinia, Turkey, Iran, Senegal, and Argentina, as well as the Netherlands-based group Boi Akih.

He has made numerous recordings, both as solo cellist and with other groups, and has been the subject of a documentary film.

—Werner Herzog Reijseger's most well known solo album is Colla Parte, which he recorded in a room of a small villa in which he was staying on a trip to Sardinia.

Reijseger is a member of the Amsterdam String Trio, with Ernst Glerum and Maurice Horsthuis, and another trio, simply called Graewe, Reijseger, Hemingway, with Georg Graewe and Gerry Hemingway.

He was also a member of the ICP Orchestra (or Instant Composers Pool) for many years, as well as the Clusone Trio with Michael Moore and Han Bennink.