Who we are

Seven Summits Arbitration (7SA) is a disputes specialist firm dedicated to international arbitration. The collective experience of our partners covers all major industry sectors and the entire arbitral process. They have acted as counsel in high-stake disputes, served as arbitrator and tribunal assistant, and headed a team at the ICC International Court of Arbitration, the world’s leading arbitral institution.

The founding partners of 7SA, Gustav Flecke-Giammarco and Gebhard Bücheler, spent their formative professional years in Paris, the heart of international arbitration. After additional years with leading dispute resolution practices in Germany, they reunited in Munich in 2017 to establish 7SA—a modern firm offering high quality legal services at competitive rates.

7SA combines the expertise and cross-border track-record clients expect from a leading international law firm with the flexibility and efficiency of a boutique practice. Passion and perseverance are the core values of 7SA, and our lawyers excel at responding to your needs.

Gustav Flecke-Giammarco

Gustav is a former Counsel at the ICC International Court of Arbitration in Paris, where he headed the case management team responsible for arbitrations seated in Germany, Switzerland, Austria, Benelux, and the Nordic countries. Gustav supervised more than 850 arbitrations, including investment treaty and emergency arbitrator cases. After six years with the ICC, Gustav joined Heuking Kühn Lüer Wojtek in Düsseldorf in 2015, where he acted as counsel and arbitrator in multifaceted domestic and international disputes until the establishment of 7SA in 2017.

Gustav is a member of the ICC Commission on Arbitration and ADR and served on the twelve-member committee drafting the new Arbitration Rules of the German Arbitration Institute (DIS), which came into force in March 2018. He is recognized as a Future Leader by Who’s Who Legal Arbitration 2017, 2018 and 2019 and has widely published on dispute resolution and private international law topics. Holding law degrees from LMU Munich and the University of Pavia, Gustav is a member of the German bar and a business mediator (MuCDR).

Professional Background

Since 2017 • Seven Summits Arbitration, Munich, Partner

2015 – 2017 • Heuking Kühn Lüer Wojtek, Düsseldorf, Senior Associate

2011 – 2015 • ICC International Court of Arbitration, Paris, Counsel

2009 – 2011 • ICC International Court of Arbitration, Paris, Deputy Counsel

2009 • German Bar Admission

Gustav is a member of the Drafting Committee revising the DIS Arbitration Rules, the ICC Commission on Arbitration and ADR and the Editorial Board of the JOIA.

He guest lectures at the Universities of Bonn and Roma Tre, the Swiss Arbitration Academy and Swiss International Law School.


2009 • Second State Exam (Munich Higher Regional Court)

2006 • Mediator for Business Disputes (Wirtschaftsmediator (MuCDR))

2006 • First State Exam (Universities of Passau and Pavia, LMU Munich)

Recent Speaking Engagements

Sources of arbitral tribunals’ powers to order security for costs, ArbIt & CAM Workshop, 23 February 2017, Milan

The arbitral award: deliberation and drafting and Challenging arbitral awards: grounds and international overview, Roma Tre University, 30 September 2016, Rome

Document Production and Discovery: What can be added to the classic discussion?, Young Arbitration Club Finland, 11 February 2016, Helsinki

Recent Publications

Arbitration Procedures and Practice in Germany, in Practical Law, with Gebhard Bücheler (Thomson Reuters, 2018)

Chapter 13: Germany, Alexander/Svatos/Walsh (eds.), in EU Mediation Law Handbook, with Kristina Osswald (Kluwer, 2017)

Dispute Boards Revival: Championing the Use of Dispute Adjudication Boards as a Project Management Tool That Helps to Avoid Disputes, with Ulrike Gantenberg, AYIA, 2016

Gebhard Bücheler

Qualified to practice law in New York and Germany, Gebhard serves as counsel and as arbitrator. Gebhard has advised a broad range of public and private clients across many industries, including energy and natural resources, healthcare and pharmaceuticals, manufacturing, and financial services. He has acted in many investment and commercial disputes, including high-value post-M&A arbitrations, price revisions under some of Europe’s largest gas import contracts, and disputes arising from other long-term contracts such as IP-licensing agreements.

Who’s Who Legal: Arbitration describes Gebhard as “a leading practitioner in the German market” with “huge experience in international arbitration”. His publications include the monograph Proportionality in Investor State Arbitration (Oxford University Press). Holding law degrees from Columbia Law School and LMU Munich, including a PhD in international investment law, Gebhard teaches international law at LMU Munich and regularly guest lectures at the University of St. Gallen.

Professional Background

Since 2017 • Seven Summits Arbitration, Munich, Partner

2013 – 2017 • Wach + Meckes LLP, Munich, Associate

2010 – 2013 • Freshfields Bruckhaus Deringer LLP, Paris, Associate

2010 • New York bar admission

2007 • German bar admission

Before his admission to the German bar, Gebhard also worked with Hogan Lovells (then Lovells) in Alicante, Spain, and the United Nations in New York.


2013 • PhD (LMU Munich, Fakultätspreis)

2008 • LLM (Columbia Law School)

2007 • Second State Exam in Law (Munich Higher Regional Court)

2004 • First State Exam in Law (LMU Munich, German National Merit Foundation)

Recent speaking engagements

Proportionality as a General Principle of Law in Investor-State Arbitration, 44th Annual Austrian Symposium on Public International Law, 13 June 2019, Rust

The Sorrows of the Young Arbitrator (The New Silk Roads), 11th ICC YAF-YAAP Joint Conference, Vienna, 13 April 2019

Mandatory Law Provisions and Procedural Issues in Commercial Agency Disputes, DIS40, 10 October 2017, Zurich

Recent publications

Arbitration Procedures and Practice in Germany, in Practical Law, with Gustav Flecke-Giammarco (Thomson Reuters, 2018)

Die Behauptung trotz Nichtwissens—Der „Vortrag ins Blaue hinein” zwischen Verfassungsrecht und Rechtsmissbrauch, in Fairness – Justice – Equity, Festschrift für Reinhold Geimer zum 80. Geburtstag, with Karl Wach (Beck, 2017)

Bitte kein BIT? Investitionsschutzverträge auf dem Prüfstand des Unionsrechts, SchiedsVZ 2016, 336, Anmerkungen zu BGH, Beschluss vom 3.3.2016- 1 ZB 2/15, with Igor Vasiljevic