Gibson Dunn Adds International Arbitration Partner Jeffrey Sullivan in London

July 11, 2017

​Gibson, Dunn & Crutcher LLP is pleased to announce that Jeffrey Sullivan will join the firm later this year as a partner in the London office.  Currently with Allen & Overy, Sullivan practices international commercial and investment treaty arbitration.

"Jeff will be an excellent addition to our international arbitration team," said Ken Doran, Chairman and Managing Partner of Gibson Dunn.  "He has a vibrant practice and an excellent reputation in the market.  Given the prevalence of investment treaty disputes and the inclusion of arbitration clauses in large commercial transactions and investment ventures, we believe that this is an area of increasing importance to our clients."

"Jeff’s investment treaty expertise will add to our bench strength in this important and busy area and will balance in precisely the right way," said Penny Madden QC, Co-Chair of the International Arbitration Practice Group.  "His practice complements our exciting growth in London and across New York, Dubai and Hong Kong."

"Jeff is recognized as a rising star in arbitration," said Cyrus Benson, Co-Chair of the International Arbitration Practice Group.  "As a former adversary to Jeff in a major arbitration proceeding, I have the utmost respect for him as a first-rate technical lawyer and advocate."


About Jeffrey Sullivan

Sullivan practices in international commercial and investment treaty arbitrations with particular expertise in public international law (PIL).  He regularly represents clients in the energy, infrastructure and private equity sector, in which he is known for spearheading multiple Energy Charter Treaty arbitrations against the Kingdom of Spain relating to the regulation of the Spanish renewable energy sector.

Sullivan is an advisory board member of the Institute for Transnational Arbitration (ITA), a member of both the Energy Charter Treaty Secretariat’s Legal Advisory Task Force and UNCTAD’s Investment Experts Group, and sits on the Executive Board of the European Federation for Investment Law and Arbitration (EFILA).  He also served as the Vice-Chair of the International Investment & Development section of the American Bar Association.

Sullivan has practiced with Allen & Overy in London since 2006.  Prior, he practiced in Washington, D.C. with Foley & Lardner from 2000 to 2005. 

He is a dual-qualified lawyer, admitted to practice in Washington, D.C. and England and Wales.  He received his law degree in 1999 from the University of Florida.  He completed a Master of Laws (LL.M.) degree in Public International Law in 2006 from University College London.