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Who's Who Legal
Who's Who Legal
Thought Leaders

Thought Leaders

Thought Leader

WWL Ranking: Thought Leader
WWL Ranking: Thought Leader

Global Leader

Arbitration 2021

Professional Biography

WWL Ranking: Recommended

Peers and clients say

"He is the top choice as an arbitrator in the German market"
"He is extremely experienced; very enthusiastic with a professional attitude"
"Experienced arbitrator with good case handling skills"
"An incredibly experienced arbitrator"


Jan Heiner Nedden is Managing Partner of HANEFELD, a leading boutique dispute resolution firm with offices in Hamburg, Germany, and Paris, France.

Heiner frequently acts as chairman, sole arbitrator and co-arbitrator in international and domestic arbitrations, including disputes involving state entities and sovereign states. He also acts as a DAB member and mediator. In addition to the numerous cases in which Heiner has represented the interests of clients, his arbitrator track record contains more than 70 international and domestic cases involving post-M&A, energy, construction and infrastructure, distribution and agency, and machine building disputes. Heiner’s experience in this regard includes acting as arbitrator in both institutional (inter alia ICC, SCC, DIS, Voldgiftsinstituttet (DIA), VIAC, WIPO) and ad hoc arbitrations in a variety of jurisdictions (inter alia, Germany, Austria, Switzerland, France, Denmark, Sweden, Romania) and under various substantive laws (inter alia Armenia, Austria, China, Czech Republic, Denmark, France, Germany, Israel, Luxemburg, Romania, Sweden, Switzerland, the Netherlands, Qatar, the UAE and the U.S.).

Heiner represents clients before arbitral tribunals and in enforcement proceedings. In addition, Heiner regularly serves as party-appointed expert in proceedings before foreign courts, including in large scale finance disputes. The exceptional quality of Heiner’s work has been acknowledged in several domestic and international rankings, and he is figured in JUVE’s list of Germany’s most renowned arbitrators, a ranking that contains less than 30 individuals, as well as in JUVE’s list of Germany’s most renowned counsel in arbitration, a ranking that contains just 20 individuals.

Prior to joining Hanefeld in 2011, Heiner served as Counsel at the ICC International Court of Arbitration in Paris for seven years, during which time he was in charge of the case management of over 1000 arbitrations and the scrutiny of some 500 arbitral awards.

Heiner is a trained mediator. He is co-editor and co-author of the German language standard practitioner’s commentary on the 2012 ICC-Rules/1998 DIS-Rules (Dr. Otto Schmidt-Verlag Köln, 2014). Heiner is an appointed member of the ICC Commission on Arbitration and ADR and the Dispute Resolution Committee of the Voldgiftsinstituttet. He is fluent in English, German and French.

Heiner’s professional background goes hand in hand with the international focus and practice of HANEFELD. The unique background and experience of the firm’s lawyers ensures that clients benefit from a particularly profound knowledge and familiarity with the perspective of parties’ counsel, arbitrators and mediators, as well as that of arbitral institutions. HANEFELD’s expertise encompasses commercial and investment arbitration. In 2017, HANEFELD received the prestigious JUVE Award for “Law Firm of the year” for Dispute Resolution in Germany and has been distinguished as having “become a benchmark […] with the scope and number of international arbitrations handled by the Hanefeld team as arbitrators or counsel [being] rather comparable to that of big law firms than boutique firms.” The opening of the firm’s Paris office in 2020 reflects the firm’s noteworthy involvement in high profile international commercial and treaty-based cases.        

National Leader

WWL Ranking: Recommended
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