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Claus Thiery
Partner

Claus Thiery

Rechtsanwalt

Languages
  • German
  • English
  • French
Social media

Claus Thiery advises and represents his clients in D&O liability and compliance cases as well as in complex commercial, corporate and insolvency-related disputes, mainly in a cross-border context and with special expertise in e-discovery, US trials and specific Middle East know-how. Formerly a regional court judge, he is a highly experienced litigator in lawsuits before the ordinary courts as well as an arbitration and out-of-court dispute resolution expert. In this context, Claus has long-standing experience in handling IT and large-scale claims.

He also acts as ombudsman for large groups, as witness adviser in, e.g., parliamentary inquiries and as mediator in complex IT and corporate disputes. Leading law firm guides frequently recommend him as a very skilful and thoughtful negotiator.

Claus joined CMS in 2002. He previously served as a judge at Konstanz Regional Court and qualified as a certified lawyer for insolvency law as well as a commercial mediator. In 2005, he worked in the dispute resolution practice of a major US law firm in Atlanta and New York.

Awards & Recognitions
01
  • Quote
    Listed for Arbitration / Dispute Resolution / Mediation
    Deutschlands beste Anwälte 2025 – Handelsblatt in Kooperation mit Best Lawyers
  • Quote
    Listed for Conflict Resolution
    Deutschlands beste Anwälte 2025 – Handelsblatt in Kooperation mit Best Lawyers
  • Quote
    „Oft empfohlen“ für Konfliktlösung
    JUVE Handbuch, 2024/2025
  • Quote
    Listed for Arbitration / Dispute Resolution / Mediation
    Deutschlands beste Anwälte 2024 – Handelsblatt in Kooperation mit Best Lawyers
  • Quote
    Listed for Conflict Resolution
    Deutschlands beste Anwälte 2024 – Handelsblatt in Kooperation mit Best Lawyers
  • Quote
    „Oft empfohlen“ für Konfliktlösung
    JUVE Handbuch, 2023/2024
  • Quote
    Listed for Arbitration / Dispute Resolution / Mediation
    Deutschlands beste Anwälte 2018, 2020, 2021, 2023 – Handelsblatt in Kooperation mit Best Lawyers
  • Quote
    Listed for Conflict Resolution
    Deutschlands beste Anwälte 2018, 2020, 2021, 2023 – Handelsblatt in Kooperation mit Best Lawyers
  • Quote
    „Oft empfohlen“ für Konfliktlösung
    JUVE Handbuch, 2022/2023
  • Quote
    "good mediator", competitor
    JUVE German Commercial Law Firms 2021 (GCLF)
  • Quote
    „auch als Mediator sehr gut“, Wettbewerber
    JUVE Handbuch, 2022/2023
  • Quote
    "Recommended" for Dispute Resolution
    JUVE German Commercial Law Firms 2022 (GCLF)
  • Quote
    "Recommended" for Dispute Resolution
    JUVE German Commercial Law Firms 2021 (GCLF)
  • Quote
    "excellent, brilliant, extremely dependable", client
    JUVE German Commercial Law Firms 2020 (GCLF)

Publications

  • "Lieferkettengesetz: Pflichten auch für Start-ups?", Mitautorin Sandra Renschke, https://www.startupvalley.news/de/lieferkettengesetz/
  • "Geplantes Lieferkettengesetz: Ende der Freiwilligkeit", Legal Tribune Online (LTO), 24.02.2021, Mitautorin Sandra Renschke
  • "Class Actions auch in der EU?", Trend Report, 05.01.2021, Mitautorin Sandra Renschke, https://www.trendreport.de/class-actions-auch-in-der-eu/,
  • "Die EU-Verbandsklage kommt: Stärkung der Klageindustrie in Europa?", Legal Tribune Online, 09.12.2020, Mitautorin Sandra Renschke, https://www.lto.de/persistent/a_id/43679
  • "Der Media­ti­ons­ver­g­leich wird welt­weit voll­st­reckbar", Legal Tribune Online 2019, Recht, Singapur-Konvention für internationale Handelskonflikte, Mitautorin Sandra Renschke, https://www.lto.de/recht/hintergruende/h/singapur-konvention-mediationsvergleich-international-vollstreckbar-voraussetzungen-kein-eu-beitritt/
  • "Wenn der Schriftsatz per Lkw kommt", Neue Juristische Wochenschrift, NJW-aktuell 29/2019, S. 12-13
  • Musterfeststellungsklage: "Wilder Westen" oder alles halb so wild?, Der Betrieb, 42/2018, S. 2550-2554, Mitautoren Dr. Matthias Schlingmann, Sandra Renschke
  • Neue EU-Sammelklage: Frei nach dem Motto "Einer für Alle – Alle gegen Einen"?, ParisBerlin, Ausgabe #122, Juli/August/September 2018, S. 42-43, Mitautorin Sandra Renschke
  • Schengen II and Dublin: Responsibility for Asylum Applications in Europe, CML ReV. 34 1997, p. 957 ff
  • Amsterdam: Vergemeinschaftung der Sachbereiche freier Personenverkehr, Asylrecht und Einwanderung sowie Überführung des Schengen-Besitzstands auf EU-Ebene, Europarecht 1998, p. 583 ff

Memberships & Roles

  • EUCON (European Institute for Conflict Management) board member
  • Member of German and international associations

Lectures list

  • "Mediators4Future – Mediation and Human Rights", 31st UIA World Forum of Mediation Centres, Frankfurt am Main, 20.06.2023
  • "The European Opportunity", ILFA 2023 European Conference, London, 27.06.2023
  • "Legal Tech und die Zukunft von ADR", 25 Jahre EUCON, München, 20.06.2023
  • "Neue Abhilfeklage – neues Zeitalter für kollektiven Rechtsschutz?", Mandantenveranstaltung München, 18.04.2023, Mitreferentin Sandra Renschke
  • Workshop Musterfeststellungsklage, Deutscher Syndikusanwaltstag 2018 - Unternehmensrecht in der Praxis, Berlin, 08.11.2018

Education

  • Trainee lawyer at Konstanz Regional Court, including stints at the German Consulate General Sydney, Philips GmbH (Hamburg) and SEG GmbH (Hong Kong)
  • Research assistant to Prof. Hartmut Maurer
  • Research assistant with the special research group "Business Globalisation", led by Prof. Hailbronner
  • Law studies at the Universities of Wuerzburg, Bristol (UK) and Konstanz
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