Theresa Ehlen

Katharina Landes is a top attorney recognized by Best Lawyers in the practice area(s) of Data Security and Privacy Law. Katharina, who practices law in Cologne, Germany, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Katharina is held by other top lawyers in the same geographic and legal practice area.

Kirsten Placke is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Kirsten, who practices law in Düsseldorf, Germany, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kirsten is held by other top lawyers in the same geographic and legal practice area.

Hermann Kahlhöfer advises clients in patent law, in particular in the fields of electrical engineering, medical technology and physics. He has been working in the field of intellectual property for more than 40 years and has extensive experience in the field of national and international patent prosecution procedures and patent infringement matters as well as in the development and exploitation of intellectual property portfolios. After completing two years of military service with a spe...

Professor Dr Stefan Hertwig specialises in the field of public commercial law, with particular emphasis on public procurement law and European state aid law. According to the trade magazine JUVE, he is one of the “leading names in public procurement law”. Who is Who Legal certifies him “an incredibly strong name in the German market, noted for his expertise in public funding and government contracts”. The practice group under his leadership advises the public sector an...

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...

Ralph Wollburg is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law and Mergers and Acquisitions Law. Ralph, who practices law in Düsseldorf, Germany, has been recognized since 2009. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ralph is held by other top lawyers in the same geographic and legal practice area.

Hans-Ulrich Wilsing is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Governance and Compliance Practice, Corporate Law and Mergers and Acquisitions Law. Hans-Ulrich, who practices law in Düsseldorf, Germany, has been recognized since 2012. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Hans-Ulrich is held by other top lawyers in the same geographic and legal practice area.

Antonio Calderón is a top attorney recognized by Best Lawyers in the practice area(s) of Mergers and Acquisitions Law. Antonio, 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 Antonio is held by other top lawyers in the same geographic and legal practice area.

Dr. Martin Jäger is Counsel at Hausfeld in Düsseldorf. He advises on all aspects of German and European antitrust law with a focus on antitrust litigation and merger control. Furthermore, he has many years of diverse experience in distribution antitrust law, in particular at the interface with intellectual property law and in antitrust damages proceedings, as well as in advising clients from the healthcare industry. Prior to joining Hausfeld, Martin was Senior Counsel at a leading G...

Olaf Konzak is a partner in the Cologne office of Friedrich Graf von Westphalen & Partner and heads the public law practice. In September 2018, Olaf Konzak and a team of four lawyers from LLR Legerlotz Laschet und Partner moved to the FGvW office in Cologne. Since September 1, 2018, he has been a partner in the practice in public law. His practice focuses on environmental and waste law, chemicals and substances law and public building law. Olaf Konzak has been working as a lawyer since 19...