Mats O Hansson (1960) has an MFA in composition from the University of Music in Gothenburg, Sweden. He composes mainly chamber music for ensembles and soloists, but also music for stage and film as well as sound and video art. Beside Sweden, his music has also been performed in Denmark, England, Germany, Italy, Greece, Poland, Spain, South Korea, Argentina and USA.

Member of the International Society for Contemporary Music, ISCM and one of the founders of Kalv Festival (Kalvfestivalen) – a festival for contemporary music in Sweden.