Winfried Bullinger

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 ...

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

Born in Brühl in 1965, Dr. Rolf Zeißig studied law in Bonn, Hamburg and Berlin. He was a research assistant at the Department of Labor and Social Law at the University of Potsdam and obtained a doctorate in labor law on the subject of “The Conservation of the Status Quo of Works Council Agreements in the Event of Termination”. Dr. Zeißig has worked as a lawyer since 1996 and as a specialist in labor law since 1999. He has been with ZENK since 2002. Dr. Zeißi...

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...

Martin Seyfarth chairs the German Public Policy Practice and co-chairs the German Energy Industry Group. He advises national and international companies on transactions, privatizations and large strategic industry and branch projects. With his extensive experience and knowledge, Mr. Seyfarth has successfully represented clients in a variety of complex deals in the corporate sector. Mr. Seyfarth has been the managing partner of the Berlin office since 2009.

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

Evgeniia Bokun-Viktorova is an Attorney at Law and a Professional Mediator, specializing in national and international litigation and arbitration. Her experience includes intellectual property rights, international business transactions, and trade law. She handles the filing of national and international trademarks, as well as opposition and revocation proceedings. Evgeniia has a talent for helping clients make strategic decisions that support their business goals. This includes, but goes bey...

Dr. Alex Petrasincu is Managing Partner at Hausfeld in Germany. He advises on all aspects of European and German competition law with a special focus on antitrust litigation. Alex is specialized in representing parties in cartel damages actions before the German courts, and has advised on damages actions in various jurisdictions. Alex has represented parties in and advised on actions before numerous German District Courts, Courts of Appeals, the German Constitutional Court, as well as the Eur...

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

Markus Appel is a top attorney recognized by Best Lawyers in the practice area(s) of Environmental Law, Public Finance Law and Public Law. Markus, 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 Markus is held by other top lawyers in the same geographic and legal practice area.