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Martin J. Wortmann


(T) +49.69.9726.3939
(F) +49.69.9726.3993


  • Harvard University (LL.M. 2010); Higher Regional Court of Zweibrücken (Second State Examination 2009); University of Münster (First State Examination 2006); University of Rome III (Erasmus program, 2003-2004)

Bar Admissions

  • Federal Republic of Germany

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 some 40 countries worldwide. Martin also has worked on various similar projects for 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.

Areas of Focus

Honors & Distinctions

  • Legal 500 Germany (2018): recommended for telecommunications, where clients say he "has outstanding analytical capabilities"


English, German, Spanish
Martin Wortmann