Great companies start with an awesome team
OX Leadership Team

At Open-Xchange, leadership is more a mindset than a title. The nature of our organization is geared towards a flat hierarchy and an open way of working together. The leadership team supports this approach through a mix of business expertise, entrepreneurial experience and operational know-how. Our culture encourages an open approach – exploring, experimenting and mixing things up. You can see the results everywhere – in our people, in our partners and how we develop multi-cultural teams.      

OX Supervisory Board

Richard Seibt
Chairman of the Supervisory Board

Since 1978 Richard Seibt profits from a long experience in the IT business and has served as Chairman of the Open-Xchange Supervisory Board, apart from a short break in 2021, since December 2006. As Managing Director at IBM Germany, he handled software sales and marketing in Germany, Austria, Switzerland and Eastern Europe. He then worked as VP Software Sales and Marketing North America and as General Manager for a worldwide operating system software Division. In 1998, he became an Executive Management board member at United Internet. In 2003, Seibt was appointed CEO at SuSE Linux and in 2004 (following the company’s acquisition by Novell), he became President of Novell EMEA (Europe, Middle East and Africa). Since leaving Novell in 2005, he has been working as a business angel and board member for several other international software companies.

John Street
Director, CEO of Pax8

John Street is an award-winning entrepreneur who has launched a range of companies, including four that garnered Inc. 500 status. He has also served on several commercial Boards and been involved in a wide variety of startups, ranging from telecommunications and high tech to agricultural biotech. He is currently CEO of Pax8, which is creating a complete cloud commerce marketplace, aggregating leading solutions for outsourced IT service providers to efficiently manage their clients’ cloud operations. Street was formerly responsible for the growth of Telephone Express, before founding USA.Net, which launched the world’s first web-based email service. In addition to serving a Chairman of MS Biotec, he also went on to found MX Logic in 2002, which became one of the world’s largest providers of email and web security and is now part of McAfee/Intel. He is currently Chairman Emeritus of the Colorado Springs Philharmonic and serves on the Board for the Institute for Cultural Evolution.

Dr. Paul-Josef Patt

Dr. Paul-Josef Patt is CEO of eCAPITAL entrepreneurial Partners, a German venture capital company. He has worked as a Project Manager at Roland Berger & Partner, the leading German strategy consultancy and as Director of Corporate Strategy at Kaufhof Holding, managing the expansion of one of Germany’s biggest retailers. After his successful exit, Patt started working as a business angel and venture capitalist. He took over the lead at eCAPITAL in 2004 and has overseen the company’s impressive growth. He has a strong track record in financing and developing young high-tech companies and as lead investor, initiated the sale of Novaled to Samsung in 2013 – at that time, the largest venture capital deal in the German hi-tech sector. Patt serves on several boards, including sonnen, Jedox AG and Heliatek.

Patrick Schaudel
Patrick Schaudel, SVP Product at IONOS With many years of experience in the IT and software industry, Patrick is a proven expert for cloud-solutions, e-business and online marketing with focus on the SMB business. At IONOS, he and his teams are responsible for the entire product portfolio for the digital success of companies of all sizes as well as the public sector. In previous positions at companies like BBDO and Haufe Group, he held several positions in B2B marketing and sales as well as product management with the focus on digital transformation.
Curt Gunsenheimer

Curt Gunsenheimer, Senior Partner at Iris Capital, joined the company in 2002. He is responsible for investments in late-stage and growth capital across Europe and supports companies across Germany and France in stages of global expansion. Gunsenheimer has twenty years of experience in venture capital and public-market financing of growth technology companies, with particular expertise in the field of software. Prior to joining Iris Capital, he worked at Goldman Sachs and Robertson Stephens.



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