projects & ensembles (selected)
- THE SOPRANOS: Gianni Mimmo & Harri Sjöström
- The Balderin Sali Orchestra: Matthias Bauer - Emilio Gordoa - Teppo Hauta -Aho - Vei Kujala - Paul Lovens - Libero Mureddu - Dag Magnus Narvesen - Evan Parker - Harri Sjöström - Sebi Tramontana - Philipp Wachsmann
- DUO - Harri Sjöström & Guilherme Rodrigues
- Trio Internazionale: Harri Sjöström - Gianni Mimmo- Veli Kujala
- MOTSTRÖM: Sjöström - Kujala - Hauta-aho (also variable line ups)
- CAVIAR: Kalle Kalima-guitar, Harri Sjöström- soprano & sopranino saxophone, Janne Tuomi- drums & percussion
- Mad House Quintet: Sergio Gastrillón- cello, James Andean- live electronics, objects, Gianni Mimmo - soprano saxophone, Jone Takamäki - clarinette, saxophone, shakuhashi flutes, Harri Sjöström - soprano & sopranino saxophone
- Quartet: Benedict Taylor - viola, Tom Jackson - clarinette, Emilio Gordoa - vibraphone
- Mothers Delight Richard Barrett - live electronics, Frank Gratkowski-bass clarinet & alto -saxophone, Veli Kujala-micro tone accordion, Harri Sjöström- soprano & sopranino saxophon
- Sestetto Internazionale : Harri Sjöström-soprano & sopranino saxophone, Gianni Mimmo- sopranosaxophone, Alison Blunt- violine, Ignaz Schick- turntables, live electronics,, Achim Kaufmann- piano, prep. piano, Veli Kujala- micro tone accordion
- Quintet M0VE: Emilio Gordoa - vibraphone, Harri Sjöström-soprano & sopranino saxophone, Adam Pultz Melbye-duble bass, Dag Magnus Narvesen- drums, Achim Kaufmann – piano, feat. Mateusz Rybicki-bass-clarinet
- Quintet Moderne: Harri Sjöström- soprano & sopranino saxophone, Paul Lovens-drums & selected symbals, Sebi Tremontana-trombone, Teppo Hauta-aho-double bass, , Phil Wachsman-violine & live electronic's
ECIO- Orchestra: Harri Sjöström-soprano & sopranino saxophone, Angelo Contini - trombone, Agusti Fernandez-piano, Barry Guy-double bass, Phil Minton-voice, Veli Kujala-1/4 tone accordion, Paul Lovens-drums & selected symbals, Gianni Mimmo-soprano saxophone, John Russell- guitar, Philip Wachsmann-violine & live electronics, Ute Wassermann- voice
- Chemystery: Harri Sjöström-soprano & sopranino saxophone, Matthias Bauer-double bass, Dag Magnus Narvesen - drums | Tony Buck
- Up And Out project: ( variable line ups) Harri Sjöström- soprano & sopranino saxophone, Matthias Bauer-double bass, Emilio Gordoa - vibraphone, PhilWachsmann - violine & live electronics,- Dag Magnus Narvesen - drums
- Misterioso Trio : Agusti Fernandez- piano, Ramon Lopez-drums & percussion, Harri Sjöström- soprano saxophone
- Duo- Sjöström & Arndt - Bernhard Arndt piano & prep. piano, live electronics, Harri Sjöström- soprano & sopranino saxophone
- Duo: Uli Kieckbusch- piano, Harri Sjöström- soprano & sopranino saxophone,
- Trio: Filip Hiemann- live electronics, Gianni Mimmo-soprano sax, Harri Sjöström-soprano & sopranino saxophone
- Sound Scapes Series: An international artist exchange project between musicians and composers based in Germany and Finland curated by Harri Sjöström and in collaboration with the ToolBox Galerie - a Finnish Art Space in Wedding, Berlin- www.galerietoolbox.com