Jacqueline Piran

Born in Duisburg in 1974, Dr. Kostja von Keitz studied law in Düsseldorf. He received his doctorate in European nature conservation and national administrative procedural law in 2005, with a thesis on the subject of “The Legal Protection of Private Individuals against Special Areas of Conservation”. He began his career as a lawyer in 2005, working initially for a major international law firm. He became a specialist in administrative law 2008 and joined ZENK in 2009. He has be...

Thomas Schulz is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law, Energy Law and Mergers and Acquisitions Law. Thomas, who practices law in Berlin, Germany, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Thomas is held by other top lawyers in the same geographic and legal practice area.

Natalie Hsiao is Local Partner in the Corporate/M&A team and focuses her practice on complex corporate transactions of all kinds, including acquisition and sale processes, joint ventures and restructurings. Natalie has broad experience in the field of M&A transactions for national and international clients with a focus on the real estate, infrastructure and the media, technology and telecoms sectors. In addition, she advises on all aspects of venture capital investments. Natalie repre...

Prof Dr Thomas Höppner is a partner with Geradin Partners. Before joining Geradin Partners in 2025, Thomas was a partner at Hausfeld for ten years. With over 20 years of experience, Thomas has advised clients on a broad range of contentious and non-contentious antitrust and regulatory matters. He has assisted clients on numerous high-stake investigations, including some of the most complex cases in the tech, media and network industries. Thomas is also a trusted litigator on matters of E...

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

Gunnar Baumgärtel is a top attorney recognized by Best Lawyers in the practice area(s) of Intellectual Property Law. Gunnar, who practices law in Berlin, Germany, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Gunnar is held by other top lawyers in the same geographic and legal practice area.

Dr. Stefan Ohlhoff is a partner in the firm's Regulatory and Government Affairs Department. He co-chairs the EU Regulatory Group and is a member of the Antitrust and Competition and International Trade, Investment and Market Access Practice Groups. He joined the firm in 1999. Dr. Ohlhoff assists clients in merger proceedings, antitrust investigations and litigation before the European Commission, the German Federal Cartel Office and European and German courts. In addition, he advises clients ...

Josef Hofschroer focuses his practice on corporate law, with an emphasis on M&A transactions for national and international clients. He particularly advises on all aspects of capital markets and securities law. Furthermore, his practice includes distressed investments as well as joint ventures. Josef has particularly wide-ranging experience in the fields of energy, technology, telecommunications and real estate. Among his clients are start-ups, medium-sized and large companies as well as ...

Friederike Engelmann-Matz is a top attorney recognized by Best Lawyers in the practice area(s) of Restructuring and Insolvency Law. Friederike, who practices law in Berlin, Germany, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Friederike is held by other top lawyers in the same geographic and legal practice area.

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