Jörn Kramer

Dr Karl Friedrich Dumoulin primarily advises companies on issues of national and international commercial law in their day-to-day business (supply and service agreements, cooperation and distribution agreements, questions relating to competition law and IP law, in particular trademark applications, licence agreements). Dr Dumoulin also represents his clients before courts, offices and courts of arbitration in these areas. In particular, Dr Dumoulin specialises in the field of financial servic...

Alexander Kessler is a lawyer recognized by Best Lawyers in the practice areas of Corporate Law, Litigation and Mergers and Acquisitions Law. Alexander practices law in Cologne, Germany Best Lawyers has recognized Alexander Kessler since 2022. 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 Alexander Kessler is held by other lawyers.

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...

Antonio Calderón is a lawyer recognized by Best Lawyers in the practice area of Mergers and Acquisitions Law. Antonio practices law in Düsseldorf, Germany Best Lawyers has recognized Antonio Calderón 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 Antonio Calderón is held by other lawyers.

Olaf Konzak is a partner in the Cologne office of Friedrich Graf von Westphalen & Partner and heads the public law practice. In September 2018, Olaf Konzak and a team of four lawyers from LLR Legerlotz Laschet und Partner moved to the FGvW office in Cologne. Since September 1, 2018, he has been a partner in the practice in public law. His practice focuses on environmental and waste law, chemicals and substances law and public building law. Olaf Konzak has been working as a lawyer since 19...

Henrik Holzapfel is a lawyer recognized by Best Lawyers in the practice areas of Intellectual Property Law and Litigation. Henrik practices law in Düsseldorf, Germany Best Lawyers has recognized Henrik Holzapfel 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 Henrik Holzapfel is held by other lawyers.

Lawyer Partner

Dr Michael Körner has been working as a lawyer in our Cologne office since 2018 and was appointed partner on January 1, 2026. He primarily advises clients in the areas of environmental law, public procurement law, public commercial law, surveying and cadastral law, and the law governing publicly appointed surveyors, in particular partnership law. He also advises on liability law, state liability and compensation law, and litigation. He speaks German and English.

Patrick Daum is a lawyer recognized by Best Lawyers in the practice area of Patent Attorney. Patrick practices law in Düsseldorf, Germany As a patent attorney, Patrick Daum is involved in patent prosecution as well as opposition proceedings to attack and defend patents in the areas of wireless communications (mobile communications), electrical engineering, aerospace technologies and mechanics. A further aspect of his work focusses on the enforcement of patents in litigation and nullity p...

Christoph J. Müller is a lawyer recognized by Best Lawyers in the practice area of Labor and Employment Law. Christoph J. practices law in Cologne, Germany Best Lawyers has recognized Christoph J. Müller since 2021. 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 Christoph J. Müller is held by other lawyers.