Christian Hamann

Christoph v. Arnim advises on corporate, financing, and insolvency law, with additional expertise in the real estate, commercial, and financial sectors. He supports clients in complex transactions, restructurings, and reorganisations as part of an experienced legal team. With many years of advisory work and supervisory board experience in both private and public companies and cooperatives, v. Arnim is highly experienced in conducting shareholders' meetings and advising decision-makers. He spe...

Jan Endler is a lawyer recognized by Best Lawyers in the practice areas of Banking and Finance Law, Competition / Antitrust Law, Environmental Law, Project Finance and Development Practice, Public Finance Law, Public Law, Public Private Partnership and Regulatory Practice. Jan practices law in Berlin, Germany Best Lawyers has recognized Jan Endler since 2014. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The rec...

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...

Elmar Bickert specializes in real estate and construction law including property related energy and environmental law. He has been dealing with the entire life cycle of real estate for many years with a particular focus on project development, financing, planning, construction, modernization, operation, management, use, as well as the acquisition and sale of property. His expertise covers real estate portfolios consisting of various asset classes and owned by national and international client...

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...

Dr Stefan Lebek is a partner and co-head of real estate at POELLATH in Berlin. He specialises in private real estate law with a focus on advice during real estate transactions (due diligence, asset and share deals, lease agreements, financing agreements, real estate-related corporate law), as well as in providing legal advice in connection with project development, joint ventures and real estate private equity investments. He also renders legal advice on all aspects of real estate-related pub...

Georg von Wallis chairs the firm’s German Tax Group. For more than 25 years, Georg has been advising clients on all tax aspects of finance and corporate transactions, in particular in cross-border situations in the media as well as the real estate sectors. Georg has wide-ranging experience handling tax litigation, VAT and other indirect taxes. He represents national and international financial institutions, major media and entertainment companies, private equity and venture capital fund...

Born in Göttingen in 1966, Dr. Martin Düwel studied law and history in Regensburg, in Aberdeen, UK and at the Free University of Berlin. From 1994 to 1998, he worked as a research assistant at the Institute for State Studies, Constitutional and Administrative Law. He has been active as a lawyer in Berlin since 1996. In 1999, he received his doctorate in constitutional law on the subject of of “Oversight Powers of the Federal Constitutional Court in Constitutional Complaints ag...

Sebastian Lutz-Bachmann is a lawyer recognized by Best Lawyers in the practice areas of Energy Law and Public Law. Sebastian practices law in Berlin, Germany Best Lawyers has recognized Sebastian Lutz-Bachmann since 2026. 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 Sebastian Lutz-Bachmann is held by other lawyers.

Jörg Michael Siecke is a lawyer and partner at the Berlin office of Friedrich Graf von Westphalen & Partner. He advises on real estate transactions with a focus on commercial real estate, in particular retail and light industrial. He further assists with sale and purchase agreements and legal due diligence cases as well as other aspects of real estate law (commercial tenancy law, neighbor law, broker law). He speaks German and English.