Gero Ziegenhorn

Lawyer and Mediator Partner

Carsten Kociok is a partner in the Technology, Financial Services and Data Privacy Practice in Berlin and Co-Head of Greenberg Traurig’s global Fintech Group. He advises national and international clients across all industries, including financial services, information technology, artificial intelligence, ecommerce, media, health care, telecoms, retail and real estate, on a wide variety of complex commercial and regulatory matters. Carsten is a leading technology lawyer, ranked consiste...

Andreas Grünwald is a lawyer recognized by Best Lawyers in the practice areas of Competition / Antitrust Law, Entertainment Law, Media Law, Regulatory Practice, Technology Law and Telecommunications Law. Andreas practices law in Berlin, Germany Best Lawyers has recognized Andreas Grünwald since 2009. 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 Andreas G...

Lawyer Senior Associate

Professor Dr Stefan Hertwig specialises in the field of public commercial law, with particular emphasis on public procurement law and European state aid law. According to the trade magazine JUVE, he is one of the “leading names in public procurement law”. Who is Who Legal certifies him “an incredibly strong name in the German market, noted for his expertise in public funding and government contracts”. The practice group under his leadership advises the public sector an...

Hendrik Muschal is a partner at fellaws, Berlin. As an acknowledged and experienced expert, he advises numerous German and international clients on all aspects of individual employment law, collective employment law in both the private and public sector, international employment law and criminal labor law. One of the focal points of Hendrik’s work regarding global HR management is innovative personnel cost optimization and data protection. Hendrik is strongly involved in international b...

Fabian Winters is a lawyer recognized by Best Lawyers in the practice areas of Public Law and Public Private Partnership. Fabian practices law in Berlin, Germany Best Lawyers has recognized Fabian Winters since 2025. 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 Fabian Winters is held by other lawyers.

Born in Dortmund in 1975, Dr. Anu Elina Birkefeld studied law from 1994-1999 at the University of Bielefeld and the Ruhr-University Bochum. She completed her legal clerkship at the District Court of Dortmund between 1999 and 2001 and has been working as a lawyer ever since. Dr. Birkefeld has been with ZENK since 2003. Furthermore she obtained her doctorate in employment and sports law at the University of Bielefeld in 2004, with a thesis on “The Employment Relationship of the Football C...

Henning Sieber focuses his practice on real estate and corporate law. He regularly advises on real estate acquisitions and sales, including the structuring and financing of real estate transactions, and has broad experience in advising in particular institutional clients on transactions in Germany and abroad. Henning is also experienced in the restructuring of real estate investments, including advising on restructuring and refinancing of distressed investments as well as on real estate inves...

Julia Schwalm is a lawyer recognized by Best Lawyers in the practice areas of International Arbitration and Litigation. Julia practices law in Berlin, Germany Best Lawyers has recognized Julia Schwalm since 2020. 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 Julia Schwalm is held by other lawyers.