Eric-Olof Söderström graduated in church music from the Sibelius Academy and qualified as a cantor and an organist. He went on to study choral conducting with Harald Andersén, Eric Ericson and Peter Erdelyi.
Söderström received his diploma in choral conducting in 1985 and went on to study orchestral conducting with Jorma Panula, graduating in 1988. He also attended master classes held by Jussi Jalas and Arvid Jansons, and studied in Vienna from 1988 to 1989. Söderström founded the Finnish Vocal Ensemble for his diploma concert, and it won the Adult chorus category at the EBU Let the Peoples Sing choir competition in 1985.
Söderström has held the position of choirmaster at the Savonlinna Opera Festival and the Finnish National Opera. He has been the Artistic Director of the Radio Chamber Choir and the Mikkeli City Orchestra, and served as guest director of the Eric Ericson Chamber Choir (Stockholm) from 2006 to 2007. He was the director of the children's opera Papa Bach from 2008.
Currently, Söderström is the Artistic Director of the Kampin Laulu chamber choir and the visiting conductor of the Helsinki Chamber Choir.
He is also the cantor and music director of the Swedish Evangelical Lutheran parish of Porvoo Cathedral.