As an independent promoter, agent & label manager, Koen worked in European underground scenes for over two decades. In 2005 he co-founded fiercely independent label Subroutine Records, releasing new music of more than fifty acts. His platform Yugofuturism is focused on connecting, export and exchange of emerging acts from Central- and Eastern Europe, from the Baltics to the Balkans, with like-minded acts, venues and new audiences. Currently also a lecturer at the University of Groningen, manager of Rotterdam post punk sensation Tramhaus, curator at festival Peel Slowly and See, regular promoter at venues WORM Rotterdam & OCCII Amsterdam and a frequent speaker at European conferences on topics that include DIY touring, grassroots international cooperation and music ecosystems. In 2023 he initiated the nomadic festival VIKENDICA, bringing a 'convoi exceptionnel' of adventurous European acts to three iconic Dutch venues in one weekend.