Norbert Klapszus

Lawyer Partner

Dr. Wolfgang Hopp studied law, biology and English in Göttingen and completed his legal clerkship in Lower Saxony. From 1997-2000, he was a research consultant at the University of Münster’s Central Institute for Spatial Planning. In 1999, he received his doctorate in spatial planning law, with a thesis on the subject of “Legal and Enforcement Issues in Spatial Planning Procedures”. Dr. Hopp has been a lawyer at ZENK since 2000. He specializes in advising and assis...

Johanna Jülicher-Sieg is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense. Johanna, who practices law in Hamburg, Germany, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Johanna is held by other top lawyers in the same geographic and legal practice area.

Lawyer, Accredited Specialist in Construction and the Law of Governing Architects Managing Partner

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

Born in Pirmasens in 1973, Florian Werner studied civil engineering with a focus on structural engineering in Hamburg from 1994-1999. After several years as construction and project manager for a medium-sized foundation engineering company in Berlin and northern Germany, he came to Hamburg to study law. Mr. Werner has been a lawyer at ZENK since 2008 and a specialist in construction and architectural law since 2011. He specializes in private construction law and advises on planning, the award...

Lawyer Partner

Born in Hamburg in 1963, Jan Dietze studied law in Passau and at King’s College in London, UK, where he obtained his Diploma of Legal Studies. He also studied in Freiburg and at Europa-Kolleg in Bruges, Belgium, where he obtained the Diplôme D’Hautes Études Européennes. Jan Dietze has been a lawyer at ZENK since 1995. His practice focuses on corporate and commercial law and M&A. He also specializes in antitrust law and compliance. Mr. Dietze is a member of ...

Sonja Schulz was born in Bremen in 1976. She studied law in Münster and Leuven, Belgium. She completed her practical training in Münster, Washington D.C. and Brussels. In addition, she completed an education in Anglo-American law, a subject-specific foreign language training, postgraduate studies in European law and training in change management. In 2003 she received a Master of European and Comparative Law from the University of Ghent, Belgium. Since 2006, Sonja Schulz has been a l...

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