Claus Thiery

Claus Thiery

Rechtsanwalt | Head of Dispute Resolution Group, CMS Germany

CMS Hasche Sigle
Nymphenburger Straße 12
80335 Munich
Languages German, English, French

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.

more less

Listed for Arbitration / Dispute Resolution / Mediation and Conflict Resolution

Deutschlands beste Anwälte 2018 – Handelsblatt in Kooperation mit Best Lawyers

Listed for Litigation

Deutschlands beste Anwälte 2017 – Handelsblatt in Kooperation mit Best Lawyers

"experience, legal intuition and negotiation skills"

The Legal 500 EMEA, 2016

Listed for Litigation

Deutschlands beste Anwälte 2016 – Handelsblatt in Kooperation mit Best Lawyers

"competent and prudent" (competitor)

JUVE German Commercial Law Firms 2016 (GCLF)

"CMS’ highly reputed dispute resolution team has new practice heads in Claus Thiery and Matthias Schlingmann"

The Legal 500 EMEA, 2015

"precise litigation" (competitor)

JUVE German Commercial Law Firms 2015 (GCLF)


  • 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

more less


  • EUCON (European Institute for Conflict Management) board member

  • Member of German and international associations

more less


  • 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

more less

Lectures list

  • Workshop Musterfeststellungsklage, Deutscher Syndikusanwaltstag 2018 - Unternehmensrecht in der Praxis, Berlin, 08.11.2018

more less


Show only
Mu­seum of Fine Arts Bern wins Gurlitt case with aid...
Ger­many in­tro­duces a con­sumer mass ac­tion: The Mod­el De­clar­at­ory Ac­tion...
In the wake of the in­tro­duc­tion of mod­el de­clar­at­ory ac­tion in Ger­many, both busi­ness people and con­sumers are strug­gling with its mean­ing. Mass claim, col­lect­ive claim, and class ac­tion are of­ten as­so­ci­ated with and men­tioned in the same breath as class ac­tion.
Dr. Dorothee Ruckteschler new Head of CMS In­ter­na­tion­al...
New EU pro­pos­al for rep­res­ent­at­ive ac­tions: "One for all – and all...
Class ac­tions, col­lect­ive ac­tions, mod­el de­clar­at­ory ac­tions. Rep­res­ent­at­ive types of leg­al ac­tions have been on every­one's lips and dis­cussed on the na­tion­al and EU level since the 2017 dies­el emis­sions case.
Dis­pute Res­ol­u­tion: Claus Thi­ery elec­ted to Board of...