After graduating from a volin class at the Secondary Music School in Gdańsk, he began conductor studies at the Music Academy in Poznań in the class of prof. Renard Czajkowski and received his university diploma under the direction of prof. Witold Krzemieński. He participated in many master classes, among others: in Leipzig (H. Rilling), Stuttgart (J.E. Gardiner) and Brixen (J. Riffkin). Sompoliński was awarded with Poznań municipal grant for young artists (1993), as well as the Głos Wielkopolski's Order for Young Art (1994). During years 1987-1999 he led the Symphonic Orchestra of the State Secondary Music School in Poznań. For three years (1987-1990) he was the conductor of Wielkopolska Symphonic Orchestra.
Among Sompoliński's most notable opera achievements is the polish premiere of Marcel Landowski's „Galina”. He also prepared the premiere spectacles of S. Moniuszka's „Halka” (2000) and G. Verdi's „Aida” (2001). In 2006 Sompoliński worked with the ensemble of Opera Nova in Bydgoszcz on the Austrian world premiere of the newly found W. A. Mozart's opera “Der Stein der Weisen” (Fetsspielhaus Salzburg).