- AGBC, American-German Business Club Frankfurt e.V., President
- American Chamber of Commerce in Germany e.V. (“AmCham”), Director, Chairman Regional Chapter Rhein-Main and Chairman Corporate and Business Law Committee
- British Chamber of Commerce in Germany (BCCG)
- Foundation of Attorneys in Hesse (Stiftung der Hessischen Rechtsanwaltschaft), President
- Frankfurt am Main Bar Association
- German-American Lawyers’ Associations (DAJV and GALA)
- German-Asian Business Circle (DAW)
- German-Austrian-Swiss-Liechtenstein Lawyers’ Association (DACH)
- German-British Jurists Association
- German Institution of Arbitration (DIS)
- German Lawyers’ Association (DAV) – Working Group for International Legal Transactions
- German-Swiss Chamber of Commerce
- George Marshall Society (Founding Member)
- International Bar Association (IBA)
- International Arbitration Institute (IAI)
- Kuala Lumpur Regional Centre for Arbitration (KLRCA) Panel Arbitrator
- Member of the Supervisory Board/Advisory Board of various companies
- The Sedona Conference, Working Group 6
- Steuben-Schurz-Gesellschaft
- Swiss Arbitration Association (ASA)
- Union Internationale des Avocats (UIA), Litigation Commission (President for six years)
- Wirtschaftsclub Rhein-Main e.V., Vice President
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