“I help people have the conversations that matter – especially when they are difficult.”

Hannah Tümpel supports individuals, organisations and states in navigating complex conversations, resolving disputes, and building common ground, particularly in international and intercultural contexts.

Expert in mediation, moderation and conflict management

Lawyer and Academic

Hannah is trained as a lawyer in Germany and holds an M.A. in Mediation and Conflict Management. She is Academic Co-Director of the Master’s Programme in Mediation and Conflict Management at the European University Viadrina and Guest Lecturer in Mediation at Humboldt University Berlin.

Certified mediator

She has been a certified mediator in Germany since 2006 and is accredited by CEDR in London. As former director of the ICC International Centre for ADR in Paris, she administered several hundred mediation, arbitration, and ADR proceedings worldwide. She also served on the ICSID conciliator list and was among the first two female conciliators appointed in ICSID cases.

Manager AND Leader

As Deputy Executive Director of UWC International, she was part of the leadership team of a multi-stakeholder organisation with entities in over 150 countries. She is also the former head of kulturweit, an international programme run by the German UNESCO Commission on behalf of the German Federal Foreign Office. Hannah supports the development of international organisations in her role as trustee on different boards. As a trainer she has worked with senior managament members of such diverse organisations as Siemens, Bosch Foundation, the German Climate Alliance and different universities.

Experience and Clients

Hannah has mediated with companies, organisations, state entities, teams and families. She has moderated high-stakes conversations internationally, including for the German Federal Foreign Office, the IBA and the German UNESCO Commission. Her work also includes mediation for organisations such as MiKK and community mediation practice with the Berlin-based non-profit ZoffOff e.V.

Multilingual and Global PracticE

Hannah is able to operate in German, English, French and Italian as required. She is based in Berlin, but is open to travelling elsewhere to work with you or to working online. She regularly works and teaches around the world.

Membership and Positions

Member of the International Mediation Institute, a trustee of CEDR, an Advisory Board Member of DIS and served on the Advisory Committee to the Taskforce on ADR and Mediation of the ICC Commission on Arbitration and ADR. For additional positions and memberships, see below.

Since 2025
Academic Co-Director Master’s Programme Mediation and Conflict Management, European-University Viadrina (Frankfurt/Oder)

2023 – 2025
Head “kulturweit”, German UNESCO Commission (Berlin)

2022
MiKK Mediation Accreditation (Berlin)

Since 2020
Guest Lecturer Mediation at Humboldt University (Berlin)

2016 – 2022
Deputy Executive Director, UWC International (London and Berlin)

2015
CEDR Mediation Accreditation (London)

2009 – 2016
Senior Manager and Counsel, ICC International Centre for ADR, International Chamber of Commerce (ICC) (Paris)

2007 – 2009
Deputy Counsel, ICC International Court of Arbitration, International Chamber of Commerce (ICC) (Paris)

2007
Second State Exam in Law (Berlin)

2005 – 2007
Junior Lawyer inter alia at the Foreign Office (Brussels and Berlin)

2006
M.A. Mediation and Conflict Management, European-University Viadrina (Frankfurt/Oder) and mediation certification

2004
1st State Exam in Law (Berlin)

  • Global Dispute Resolution Conference, Université Paris-Panthéon-Assas (Paris, February 2026)
  • Shaping the Future of Mediation: IMI-CMS-CDRC International Mediation Evening (Vienna, August 2025)
  • International Forum Mediation and Law, Ukrainian Academy of Mediation (Online, June 2025)
  • 5th ICC European Conference on International Arbitration (Online, June 2021)
  • BCDR/AAA/SCC Joint Conference on Investment Arbitration (November 2018)
  • YACF 5th Anniversary Conference, Keynote Speaker (Helsinki, 2017)
  • ICC Commission on Arbitration and ADR, Keynote Speaker (May 2016)
  • IBA Annual Conferences (Rome, 2018; Sydney, 2017; Dubai 2012; Dublin 2011; Vancouver, 2010)
  • Launch Conference for ICC Mediation Rules (inter alia in Paris, Hong Kong, Sydney, Manila, Dubai, Ankara, Panama, Rome and New York; mostly in 2014) and ICC Expertise Rules (Dubai and Paris; 2015)
  • Seminar for Public and International Law (Quito, 2014)
  • International Judicial Conference (Islamabad, 2013)
  • Fordham Conference (London, 2012)
  • Civil Mediation Council (UK, 2011)

  • Commentary on the ICSID Mediation Rules, in: Happ/Wilske (Editors): ICSID Rules and Regulations 2026 (publication date expected October 2026)
  • “Strengthening Mediation of Investor-State Disputes: An Introduction to the New ICSID Mediation Rules”, ICC Bulletin 2022, Issue 3
  • “The role of mediation in the aftermath of COVID-19”, BCDR International Arbitration Review (December 2020)
  • “Process Standards in (international) Commercial Mediation Proceedings“; Konfliktmanagement in der Wirtschaft, Nomos, 2015
  • “Introduction to the New ICC Mediation Rules”, ICC International Court of Arbitration Bulletin, December 2013
  • “Bringing the Parties to the Table: The Role of Institutions for successful Conduct of Mediation Proceedings”, Zeitschrift für Konfliktmanagement, May 2012
  • “Ten Years Mediation Proceedings of the International Chamber of Commerce”, Konfliktdynamik, February 2012

  • Deutsche Institution für Schiedsgerichtsbarkeit (DIS) – Member Advisory Board (since 2026)
  • United World Colleges of the Adriatic – Trustee (Duino, Italy) (since 2024)
  • CEDR (Centre for Effective Dispute Resolution) – Trustee (London, UK) (since 2023)
  • Beirat Entwicklungszusammenarbeit des Berliner Senates (Advisory Board for Development Cooperation of the Berlin Senate) – Member (since 2023)
  • ICC International Commercial Mediation Competition, IBA-VIAC Mediation and Negotiation Competition and other competitions – expert and assessor (since 2014)
  • International Mediation Institute – Member Mediation Public Policy Committee, previously member of the State-Investor Mediation Working Group, the Standards Commission and the Inter-Cultural Task Force (since 2010)
  • Advisory Committee to the Taskforce on ADR and Mediation of the ICC Commission on Arbitration and ADR – Member (2020 – 2024)
  • UNCITRAL revision of Rules on Conciliation – Member of Working Group (2018)
  • IBA Mediation Committee – Co-Chair of Investor-State-Mediation Sub-Committee of the IBA Mediation Committee (2011 – 2019)

Selected information – for complete lists please contact me.