He is also appointed representative of litigants in proceedings before the European Court of Justice and the General Court. In the past, he represented clients within the following cases, among others:

• DocMorris I (Case C-322/01)
• DocMorris II (Joined Cases C-171/07, C-172/07)
• Commission v Germany (Case C-424/07)
• Carmen Media (Case C-46/08)
• Kahla Porzellan (Case C-537/08 P)
• Thüringen v Commission (Case T-318/00)
• CDA Datenträger v Commission (Case T-324/00)
• Kahla Porzellan (Case T-20/03)
• CSL Behring v Commission (Case T-264/07)
• Deutsche Lufthansa v Commission (Case T-492/15)
• Deutsche Lufthansa v Kommission (Case T-764/15)
• EURAWASSER v Kommission (Case T-190/19)
• Telekom Deutschland GmbH v Bundesrepublik Deutschland (Case C-34/20)
• Fachverband Eisenhüttenschlacken v Kommission (Case T-560/22)

Appeal Cases

• Deutsche Lufthansa vs. Kommission (Case C-453/19 P)
• Deutsche Lufthansa vs. Kommission (Case C-594/19 P)