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Stooß, Tanja
Direct Tel: +49 711 1856 9012, Direct Fax: +49 711 1856 9100
Tel: +49 711 1856 9000 Fax: +49 711 1856 9100

Tanja Stooß is a German qualified attorney (Rechtsanwältin) and Counsel in Quinn Emanuel’s Stuttgart office.

Tanja specializes in German and international commercial arbitration. She advises and represents clients in arbitration proceedings, has experience as arbitrator and has served as Tribunal Secretary in numerous arbitration proceedings. Tanja has been the regional coordinator of DIS40 (young practitioners group of the German Arbitration Institute) in Stuttgart since 2021.

With a focus on cross-border disputes, Tanja also represents clients before German state courts at the trial and appellate level.

Tanja joined the firm in 2022. Prior to joining the firm, Tanja worked as an attorney in the Dispute Resolution practice group of a major German law firm.

Tanja graduated from the University of Heidelberg in 2012. Subsequently, she was a research assistant in the Dispute Resolution practice group of a major German law firm. In addition, she was coaching the teams of the University of Heidelberg for the “Willem C. Vis International Commercial Arbitration Moot” competition. In 2017, Tanja completed her legal clerkship at the Higher Regional Court of Karlsruhe, with stages inter alia at Quinn Emanuel and a Spanish law firm with a focus on alternative dispute resolution.

  • Representation of a manufacturer of drive systems in an ICC arbitration regarding warranty claims
  • Representation of the former shareholders of a German limited liability company in a post M&A-dispute under the Arbitration Rules of the DIS (German Arbitration Institute)
  • Representation of a client in a construction dispute under the Arbitration Rules of the DIS (German Arbitration Institute)
  • Representation of a manufacturer of intelligent energy systems and battery management systems in various warranty disputes 
  • Representation of a client in a German mass litigation case
  • Commercial Litigation
  • International Arbitration
  • International Disputes
  • Transnational Litigation
  • Higher Regional Court of Karlsruhe
    (Second State Examination, 2017)
  • Ruprecht Karl University of Heidelberg
    (First State Examination, 2012)
  • The German Bar (Rechtsanwaltskammer Stuttgart)

  • German
  • English
  • Spanish
  • CMS Hasche Sigle:
    • Senior Associate, 2020-2022
    • Associate, 2017-2019
    • Research Assistant, 2012-2016           
  • University of Applied Sciences in Baden-Wuerttemberg:
    • Lecturer in Civil Law, 2016-2020
  • International Hellenic University, Thessaloniki, Greece:
    • Lecturer for the Module “Recent Legal Developments in Transnational and European Commercial Law and Alternative Dispute Resolution” in the LL.M. Program, 2013
  • 2024: Ranked by The Best Lawyers in Germany – Ones to Watch for International Arbitration


  • „Anfechtung des Schiedsspruchs (Aufhebungsverfahren)“, Handbuch Schiedsgerichtsbarkeit Deutschland – Österreich – Schweiz, Torggler et. al. (ed.), 3rd edition, to be published 2023 (co-authors: Martin Wiebecke, Markus Schifferl)
  • „Die vorzeitige Beendigung der Schiedsrichtertätigkeit“, Festschrift für Herbert Kronke, Verlag Ernst und Werner Gieseking, 2020: pp. 1517-1527 (co-author: Dorothee Ruckteschler)
  • „International Commercial Courts: A Superior Alternative to Arbitration?”, Journal of International Arbitration 36, no. 4 (2019): pp. 431-450 (co-author: Dorothee Ruckteschler)
  • “Do international commercial courts represent renewed competition for arbitration?“, Business Law Magazine, no. 2 (2016), 06.06.2019 (co-author: Dorothee Ruckteschler)
  • „Englischsprachige Handelsgerichte – Ein Gegenangriff auf die Schiedsgerichtsbarkeit?“, Legal Tribune Online, 06.03.2019 (co-author: Dorothee Ruckteschler)


  • “A fire debate: Are commercial courts the better choice in emergency cases?”, debate at the DIS40 Autumn Conference 2023, Berlin, 15.09.2023
  • “Climate Finance and Arbitration”, DIS40 Autumn Conference 2019, Berlin, 10.09.2019
  • "Challenges in Preparing Effective Damages Evidence", CIArb-YMG Annual Conference, Istanbul, 19.10.2013
  • Regional Coordinator of the young practitioners group of the German Arbitration Institute (DIS40) since 2021
  • Member of:
    • German Arbitration Institute (DIS and DIS40)
    • ICC Young Arbitrators Forum
    • ICDR Young & International
    • Club Español de Arbitraje (CEA and CEA40)
    • German-Mexican Lawyers’ Association
    • German-Spanish Lawyers’ Association