Leonard Mittmann

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 ...

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...

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

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

Sönke Görgens is a top attorney recognized by Best Lawyers in the practice area(s) of Construction Law and Real Estate Law. Sönke, 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 Sönke is held by other top lawyers in the same geographic and legal practice area.

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.

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

Lawyer, Accredited Specialist in Banking and Capital Markets Partner

Ronald Steiling is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law, Environmental Law and Public Law. Ronald, who practices law in Hamburg, Germany, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ronald is held by other top lawyers in the same geographic and legal practice area.

Dr. Jörn Bosse serves clients primarily from the corporate sector in Hamburg, with a focus on construction and real estate law. His work involves assisting companies in navigating the complexities of real estate project development. This includes obtaining necessary building permits, maintaining neighborhood relations, and overseeing construction operations. Dr. Bosse emphasises the importance of resolving disputes out of court, though he is prepared to litigate when needed. Real estate ...