Christina Dorn

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 and is partner with ZENK. His practice focuses on corporate and commercial law and M&A. He also specializes in antitrust law and compliance. M...

Arnd Weisner is a lawyer recognized by Best Lawyers in the practice areas of Capital Markets Law, Corporate Law, Litigation and Mergers and Acquisitions Law. Arnd practices law in Hamburg, Germany Best Lawyers has recognized Arnd Weisner since 2022. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Arnd Weisner is held by other lawyers.

Franziska von Kummer is a lawyer recognized by Best Lawyers in the practice area of Labor and Employment Law. Franziska practices law in Hamburg, Germany Best Lawyers has recognized Franziska von Kummer since 2027. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Franziska von Kummer is held by other lawyers.

Born in Hamburg in 1962, Birgitta Weihrich studied law in Hamburg. After completing her legal clerkship – including a post at the Directorate-General for Competition of the European Commission in Brussels and Speyer – she was admitted to the bar in 1992. After spending a number of years in a commercial law firm in Northern Germany and as a legal advisor and authorized signatory of an insurance company, she joined ZENK in 2018. She has many years’ experience in both a wide ra...

Olaf Hartenstein is a lawyer recognized by Best Lawyers in the practice areas of Maritime Law and Transportation Law. Olaf practices law in Hamburg, Germany Best Lawyers has recognized Olaf Hartenstein since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Olaf Hartenstein is held by other lawyers.

Dr Menso Engelmann has been practising as a lawyer in the field of corporate law and M&A since 2008. He advises private individuals, strategic and financial investors, private equity funds, family businesses, joint ventures, and listed companies on all aspects of corporate transactions. He also provides guidance on transactions in the context of corporate crises and restructurings under transformation law, as well as on real estate transactions. In corporate law, his focus is on stock cor...

Oliver Dankert is a lawyer recognized by Best Lawyers in the practice area of Restructuring and Insolvency Law. Oliver practices law in Hamburg, Germany Best Lawyers has recognized Oliver Dankert since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Oliver Dankert is held by other lawyers.

Lawyer Partner

Jan Erik Spangenberg specialises in dispute resolution, litigation and arbitration. He acts both as counsel and as arbitrator. He assists companies, governments and individuals in navigating complex disputes, in particular international commercial and investment arbitrations. He also advises governments and investors in relation to foreign investments and public international law. Jan Erik Spangenberg has successfully represented clients in many high stakes arbitrations (including ICC, DIS, S...

Born in Helgoland in 1966, Dr. Carsten Oelrichs trained as an industrial business administrator before going on to study law at the University of Hamburg, where he also worked as a research assistant at the Chair of Commercial, Shipping and Business Law. He received his doctorate in 1998, with a thesis on “Creditor Participation and Voting Bans in New Insolvency Proceedings”. Dr. Oelrichs has been a lawyer at ZENK since 1998. Dr. Oelrichs is partner with ZENK. For several years ru...