Radumski is the Founder and serves as the Managing Director and Chief Executive Officer at Uplink (Digital Network Technology). He served as the Chief Executive Officer at COMPASS HEADING. He has a degree in Business Management from VWA Dsseldorf in 1998. After gaining a degree in business administration, he gained experience in regulated market environments in the liberalized telecommunications sector already at the end of the 1990s, most recently as the managing director responsible for the launch of the REWE Group's own mobile communications brands. As Chief Technology Officer for the Swiss media company CITYGUIDE AG, he was responsible for the development and the Europe-wide rollout of digital city guides until 2013 when he founded the UPLINK Network GmbH as managing partner.