As a soloist Sigfridsson has played with the leading Finnish orchestras and numerous orchestras throughout the world, including the Vienna Radio Symphony Orchestra, Berlin Konzerthaus Orchestra, the Munich Symphony Orchestra, the Stuttgart Chamber Orchestra, Stuttgart Philharmonic Orchestra, Stuttgart Radio Orchestra, the “Junge Deutsche Philharmonie”, Orchestra Sinfonica di Roma, Orchestra Sinfonica di Milano Giuseppe Verdi, the Warsaw Philharmonic Orchestra, and many others, under the baton of prestigious conductors such as Andris Nelsons, Sir Neville Marriner, Dorian Wilson, Daniel Raiskin, Young-Min Park, Lior Shambadal, Vladimir Ashkenazy, Dennis Russel Davies, Lawrence Foster, Roman Kofman, Heinrich Schiff, Sakari Oramo, Jukka-Pekka Saraste, Osmo Vänskä, Okko Kamu, Hannu Lintu etc.
In 2005 Sigfridsson won the First Prize at the Beethoven International Piano Competition in Bonn, where he got the Audience Prize and Chamber Music Prize as well.
As the winner of the Second Prize of the Zurich Geza Anda Piano competition 2000, Sigfridsson not only impressed the Jury under the chairmanship of Vladimir Ashkenazy, he won the hearts of many members of the public who attended the final concert in the Zurich Tonhalle, and he walked off with the Geza Anda Audience Prize. Sigfridsson got first prize at the 1994 International Franz Liszt Piano Competition in Weimar.
Sigfridsson has made notable performances in the Vienna Musikverein, Vienna Concert Hall, Berlin, Cologne and Munich Philharmonies, Munich Herkulessaal, Berlin Konzerthaus, Stockholm Concert Hall, St. Petersburg Philharmony, major halls in Japan, Italy and Austria, Wigmore Hall London, Kennedy Center Washington, Theatre Chatelet Paris, Auditorio Nacional Madrid etc. Sigfridsson performs at very prestigious festivals like the Salzburg Festival, Augsburg Mozart Week, the St. Petersburg Musical Olympus Festival, Ruhr Piano Festival to name just a few.
Henri Sigfridsson feels a very deep commitment to chamber music. He appeared with Leonidas Kavakos, Gidon Kremer, Ivry Gitlis, Gordan Nikolic, Patricia Kopatchinskaja, Mischa Maisky, Sol Gabetta, Johannes Moser, David Geringas, Michel Lethiec, Milan Turkovich, Boris Berezovsky and Melvyn Tan to name just a few. Sigfridsson has a number of recordings including the Piano Concertos of F.X.Mozart (W.A. Mozart’s son), Sibelius Piano Transcriptions, Rachmaninov Piano Concertos no. 2 and no. 3.