Harri Kerko studied at the Sibelius Academy in 1988–1997, first at the church music department (1988–1992) in Kuopio, later (1992–1997) music conducting and composing in Helsinki. His composing teacher was Tapio Nevanlinna, a Finnish composer. Harri Kerko received his Master of Music degree in 1996.

Since 1995, Kerko’s works have been performed widely in various music festivals in Finland. In addition to his composing work, he has been working as a musician and producer in different music genres. He has worked widely in the Finnish cultural field, for instance having worked in collaboration with choreographers, dancers, actors, directors and producers.