Verena Grentzenberg

Born in Göttingen in 1974, Dr. Stefanie Hartwig studied law in Kiel and Liège from 1994 to 1998 and completed her postgraduate studies in business law in Hamburg. Thereafter, she worked as a trainee lawyer in Hamburg and New York and as a research associate at the University of Hamburg. She completed her doctorate in 2002. Ms. Hartwig has been working as a lawyer since 2003, initially in a major international law firm and since 2005 at ZENK. Since 2007, she has also been a special...

Born in Bremerhaven in 1984, Dr. Lisa Feuerhake studied German and Anglo-American law in Münster. After passing her first state licensing examination, Dr. Feuerhake completed a doctorate on the subject of “Competition Law in England”. As part of her doctorate, she spent a research semester at the University of Oxford, UK, for which she received a German Academic Exchange Service (DAAD) scholarship. From 2010-2012, she completed her legal clerkship in Hamburg, with posts abroa...

Jan Tobias Hartmann is a top attorney recognized by Best Lawyers in the practice area(s) of Labor and Employment Law. Jan Tobias, 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 Jan Tobias is held by other top lawyers in the same geographic and legal practice area.

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

Sebastian Jungemeyer is a top attorney recognized by Best Lawyers in the practice area(s) of Arbitration and Mediation. Sebastian, 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 Sebastian is held by other top lawyers in the same geographic and legal practice area.

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...

Daniel Hoppe advises and represents clients in Germany and abroad on all questions of intellectual property, in particular on patent and employee invention law as well as on the law of trade secrets. He has extensive experience in criminal investigations, which are essential in the prosecution of trade secret violations. He is the author of numerous professional publications on intellectual property law. He heads the Hamburg office of Bonabry.

France—its culture, language and way of life—has fascinated Dr Frank Hagemann since his youth. It was therefore a fortunate coincidence when the Hamburg-based law firm Seelig, that later merged with FPS, was seeking support in trade mark law for the French market at just the right time, allowing him to combine his professional and personal interests. While his international work is wide-ranging, Dr Hagemann has always placed particular emphasis on maintaining and expanding his Fre...

Lawyer Partner

Maria von Rosen is a top attorney recognized by Best Lawyers in the practice area(s) of Labor and Employment Law. Maria, 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 Maria is held by other top lawyers in the same geographic and legal practice area.