As an active chamber musician, Ismo has played chamber music around the world (e.g. at Dresden Musikfestspiele, Moritzburg Festival, Charlottesville Chamber Music Festival, Mainzer Musiksommer, Meisterkonzerte Dresden, Büsingen Kammermusiktage, Kempten Classix, Naantali Music Festival, Helsinki Festival, Kuhmo Festival, Turku Music Festival, Musica Nova, Avanti! Summer Sounds, Our Festival). Furthermore, he has been the first ever classical guitarist invited by several of them. 

Some musicians with whom Ismo has played:

Permanent duos with violinists Pekka Kuusisto and Karen Gomyo and with cellist Jan Vogler
Violin: Elina Vähälä, Baiba Skride, Mira Wang, Alina Ibragimova, Benjamin Schmid, Jaakko Kuusisto, Priya Mitchell
Viola: Vladimir Mendelssohn, Anna-Kreetta Gribajcevic, Lilli Maijala, Lise Berthaud, Hsin-Yun Huang
Cello: Jan Vogler, Marko Ylönen, Jan-Erik Gustafsson, Andreas Brantelied
Piano: Olli Mustonen
Flute: Patrick Gallois, Petri Alanko
Oboe: Olivier Doise, Washington Barella
Clarinet: Kari Kriikku, Michel Lethiec, Christoffer Sundqvist
Singers: Jorma Hynninen, Helena Juntunen, Pia Freund, Virpi Räisänen, Topi Lehtipuu.
String quartet: Meta4, Kamus quartet, Uusi Helsinki quartet
Accordeon: Janne Rättyä, Mika Väyrynen
Bandoneon: Marcelo Nisinman
Guitar: Xavier Diaz La Torre.
Kekkonen Guitar Quartet: Petri Kumela, Jyrki Myllärinen, Otto Tolonen
Other: Dancer/Choreographer Minna Tervamäki, actor Jussi Vatanen, Folk music group JPP