Kosmalski is a DJ and promoter present on the scene for more than a dozen years, living permanently in Gdynia. Co-creator and co-producer in music projects Szkatulski & Kosmalski and FESS, with releases for several labels including the album TRIP released in 2019. Animator of the local scene, responsible for the temporarily defunct Gdynia club Drugi Dom. A faithful old-school record collector who likes to take his listeners to electronic environs bordering on techno and house.