The Management Board of United Internet AG consists of Ralph Dommermuth, André Driesen and Carsten Theurer.

Ralph Dommermuth
CEO since 1988

Ralph Dommermuth laid the foundation for today’s United Internet AG with the formation in 1988 of 1&1 Marketing GmbH. He originally offered systemized marketing services for smaller software suppliers. He later developed additional marketing services for major clients, such as IBM, Compaq and Deutsche Telekom. With the growing professionalization of the internet, these marketing services for third parties were gradually reduced and the company offered its own internet services. In 1998 the qualified banker took 1&1 to the stock exchange. It was the first IPO of an internet company in Germany. In 2000, Dommermuth restructured 1&1 as United Internet AG.

André Driesen
CFO SINCE 2026

André Driesen has been a member of the Management Board of United Internet AG since 2026 and is responsible for Finance and Controlling, Risk Management/Internal Audit, Legal, Tax, M&A and Investor Relations. Mr. Driesen has many years of experience in finance, corporate management, and M&A. As former CFO of Drillisch AG and subsequently of 1&1 Drillisch AG, he supported major strategic transactions and the merger of Drillisch and 1&1 through to the end of 2019. Through his many years of work within the Group, he is familiar with the United Internet Group, its structures, and its key business fields. Most recently, he has worked as an independent consultant and held supervisory positions.

Carsten Theurer
management Board member since 2025

Carsten Theurer has been a member of the Management Board of United Internet AG since 2025 and is responsible for Finance and Controlling, Risk Management/Internal Audit, Legal, Tax, M&A and Investor Relations. Carsten Theurer previously spent over 20 years in various divisions of the Schwarz Group, in his last position as Group CFO. In these roles, he accompanied the international growth of the Schwarz Group in the retail sector and played a key role in the development of the company's own production companies.