Maarten Ornstein plays tenor saxophone, clarinet and bass clarinet. On occasion he plays tarogato, electric saxophone, MPC and laptop computers. He is also a composer and arranger. He leads the free funk ensemble DASH! and performs as a soloist. Additionally, he plays with lutist Mike Fentross, pianist Sunna Gunnlaugs and performance poet and singer Jeannine Valeriano. Maarten Ornstein is a member of Splendor Amsterdam.
Maarten Ornstein has composed for the Calefax Reed Quintet, the North Sea Jazz Festival, Ties Mellema, Koor Nieuwe Muziek Amsterdam, Xenia Meijer, the Metropole Orchestra, New Cool Collective Big Band, Orkater Theatre Company, Anouk van Dijk DC, Jazz Orchestra of the Concertgebouw, Helena Rasker, the Ricciotti Ensemble, Gerard Bouwhuis, Daria van den Bercken, Dudok Kwartet and many more. He was co-leader of the modern jazz trio Jungle Boldie (with Tony Overwater and Wim Kegel) and has played with the likes of Pat Metheny, The Ebony Band, Sunna Gunnlaugs, Caoimhin O Raghallaigh, Ilse de Lange, Ayman Tayseer, David Liebman, Arturas Bumsteinas, Claron McFadden, Red Mitchell, Rima Khcheich, the Schoenberg Ensemble etc etc.