Dr. Martin J.Wortmann


Frankfurt + 49.69.9726.3939

Martin Wortmann practices administrative, regulatory, and constitutional law with a focus on regulated industries. He advises German and international companies primarily in the fields of aviation and telecommunications. He is involved in litigation before the administrative courts, including proceedings before the Federal Administrative Court, and the Federal Constitutional Court.

He has recently coordinated an extensive regulatory review of telecommunications law covering approximately 40 countries worldwide. Martin also has worked on various similar projects for over-the-top (OTT) service providers and advised on questions regarding German and European laws.

Prior to joining Jones Day in 2016, Martin worked as a trainee lawyer at the German Federal Constitutional Court, the European Court of Justice, and the German Development Cooperation Agency's office in Tbilisi, Georgia. He also worked as a research associate for a major international law firm where he participated in M&A transactions, an international compliance mandate, and a major arbitration case. He later served as a research fellow at the Max Planck Institute for Comparative Public Law and International Law in Heidelberg and at the University of Giessen where he wrote about public international law and international economic law. During this time, he also was a consultant on issues of constitutional transitions and was a guest lecturer at the Universidad de Antioquia in Medellín, Colombia.


  • Google defends Gmail against European telecommunication regulationJones Day represented Google LLC against the German telecommunications regulatory agency in administrative court proceedings concerning the obligation to notify Gmail as an Electronic Communication Service (ECS).
  • Amadeus FiRe AG acquires COMCAVE Holding GmbH, Dortmund for €200 millionJones Day advised Amadeus FiRe AG, Frankfurt, on the €200 million acquisition of 100% of the shares in the retraining specialist COMCAVE Holding GmbH, Dortmund.
  • Pandox acquires seven hotel properties in Germany from HR Group for €290 millionJones Day advised Pandox AB, a leading hotel investor in Northern Europe, on the acquisition of seven German hotel properties with a total of 1,532 rooms from HR Group for €290 million.
  • Lufthansa receives favorable ECJ ruling to challenge airport feesJones Day represents Deutsche Lufthansa AG in litigation against the State of Berlin and the operator of the Berlin-Tegel airport.
  • Technology services company conducts international telecommunications law reviewJones Day conducted a comprehensive assessment of a technology services company's new communication product offered to multinational business owners, with respect to communications and encryption regulations from over 80 countries worldwide.
  • Koch-Glitsch acquired Julius Montz from Pfaudler GroupJones Day advised Koch-Glitsch, a subsidiary of Koch Engineered Solutions (KES) and its parent company Koch Industries, Inc., in the acquisition of chemical and pharmaceutical process equipment and technology supplier Julius Montz GmbH (Montz) from the Pfaudler Group, a portfolio company of Deutsche Beteiligungs AG (DBAG).
  • Fosun acquires FFT GroupJones Day advised Fosun International Limited with the acquisition of FFT GmbH & Co. KGaA ("FFT") from ATON GmbH.
  • Lincoln Electric acquires Air Liquide Welding for €115 million (US$134 million)Jones Day advised Lincoln Electric Holdings, Inc. in the €115 million (US$134 million) acquisition of the Air Liquide Welding subsidiary of Air Liquide, a key player in the manufacturing of welding and cutting technologies.
  • Nordson acquires InterSelect GmbHJones Day advised Nordson Corporation in its acquisition of InterSelect GmbH, a German designer and manufacturer of selective soldering systems used in a variety of automotive, aerospace, and industrial electronics assembly applications.
  • Randstad acquires Monster for $429 millionJones Day advised Randstad Holding nv (AMS: RAND), a leading human resources services provider, in the acquisition of Monster Worldwide, Inc. (NYSE: MWW).
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