Mr. Ralph Dommermuth is a Chairman-Supervisory Board at Drillisch Netz AG, a Chief Executive Officer at 1&1 Drillisch AG and a Chief Executive Officer at United Internet AG.

He is on the Board of Directors at 1&1 Internet Holding SE. Mr. Dommermuth was previously employed as a Chief Executive Officer by Drillisch AG, a Member-Supervisory Board by STRATO AG, a Member-Supervisory Board by Rocket Internet SE, a Member-Supervisory Board by 1&1 Internet SE, a Member-Supervisory Board by Sedo Holding AG, and a Chairman by United Internet Media AG.