The Management Board of United Internet AG consists of Ralph Dommermuth, Carsten Theurer and Markus Huhn.
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.
Carsten Theurer
CFO 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 Investment Management. 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.
MARKUS HUHN
BOARD MEMBER SINCE 2023
Markus Huhn has been a member of the Management Board of United Internet AG since 2023 and is responsible for the Shared Services division. He has been with the United Internet Group since 1994 and, as Commercial Director until 2007, was responsible in particular for Controlling and Growth Strategy. Markus Huhn was CFO of the United Internet Group from 2008 to 2024. As a member of the Management Board of 1&1 Telecommunication SE, he was responsible for Finance and Human Resources in the Consumer Access division from 2013. From July 1, 2019 to December 31, 2024, he was also CFO of 1&1 AG.