Christian Stallberg

Claudia Maaßen LL.M. is a lawyer and partner at Friedrich Graf von Westphalen & Partner. She has been working in the litigation and arbitration practice group of Friedrich Graf von Westphalen’s Cologne office since 2016. Claudia Maaßen is a specialist in dispute resolution with a focus on manager liability and D&O and product liability. Her clients include insurance companies, managers and private companies. Claudia Maaßen speaks German, French and English.

Born in 1960 Apprenticeship as banker 1981 Legal studies at the University of Münster First Exam ("1. Staatsexamen") in 1986 Postgraduate studies at the University of Pennsylvania, Philadelphia, USA, 1986 - 1987 Master of Laws (LL.M.) 1987 Doctor of Laws (Dr. jur.) 1989 Second (Bar) Exam ("2. Staatsexamen") in 1990 Bar admission in Germany in 1990, with the firm since then Admission to the New York bar in 1991 Certified Specialized Attorney in International Business Law since 2014 Member...

Dr Jan Joachim Dreyer’s work includes antitrust defence, in particular for companies with strong market positions, in sales and traditional antitrust matters, compliance issues in sales and in all forms of cooperation between competitors. His areas of expertise also include global and local merger control, including litigation over decisions by authorities reaching the German Federal Court of Justice and the European courts, claims for damages arising from antitrust violations, state ai...

Helmut Balthasar is a top attorney recognized by Best Lawyers in the practice area(s) of Restructuring and Insolvency Law. Helmut, who practices law in Cologne, Germany, has been recognized since 2010. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Helmut is held by other top lawyers in the same geographic and legal practice area.

Maximilian L. Reidt is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation. Maximilian L., who practices law in Düsseldorf, Germany, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Maximilian L. is held by other top lawyers in the same geographic and legal practice area.

Oliver Lieth is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law and Real Estate Law. Oliver, who practices law in Düsseldorf, Germany, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Oliver is held by other top lawyers in the same geographic and legal practice area.

Jochen Lehmann is a top attorney recognized by Best Lawyers in the practice area(s) of Arbitration and Mediation. Jochen, who practices law in Cologne, Germany, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jochen is held by other top lawyers in the same geographic and legal practice area.

Justus Kreuels´ practice involves patent prosecution in the fields of mechanical engineering, automotive engineering, information technology and medical engineering and patent opposition as well as invalidity proceedings before the European Patent Office, the German Patent and Trademark Office, and the Federal Patent Court. He studied mechanical engineering at the Technical University of Munich (TUM) and at RWTH Aachen University where he graduated as Master in Engineering in 2007. In 2...

Partner at MAYGREEN Tax & Legal

Dr Möller has been a lawyer and partner at FPS since 1997 and is an expert in private construction, real estate, and public procurement law. She has extensive experience advising on large-scale projects—especially in healthcare, cultural, and municipal buildings—guiding clients from planning through to successful completion. Her focus includes contract drafting and negotiation, dispute avoidance, claim management, and legal enforcement. In public procurement, she supports con...