Presented by
The London School of Economics
December 17, 2025
@ 1:00–2:00 PM (London) / 8:00–9:00 AM (New York)
The Chartered Institute of Arbitrators, North America Branch (CIArb NAB), is proud to sponsor a virtual session via Zoom, hosted by the London School of Economics (LSE) in its distinguished series, Arbitration in Practice: Challenges and Opportunities, reinforcing our commitment to thought leadership and professional development in international arbitration.
About the Event
The LSE is hosting a session in its distinguished series, Arbitration in Practice: Challenges and Opportunities, bringing together leading voices in international arbitration to discuss emerging issues, practical insights, and the future of the field.
CIArb NAB supports this distinguished series as part of its mission to foster leading dialogue in international arbitration and to promote engagement with academic institutions and practitioners worldwide.
Featured Speakers
This session brings together three distinguished leaders in international arbitration whose collective expertise spans academia, complex commercial disputes, and global arbitral practice.
Prof. Dr. Paul MacMahon, Associate Professor of Law at the LSE Law School and Director of the Executive LLM Programme, brings deep expertise in contracts, commercial law, and international arbitration. A former faculty member at Harvard and Cambridge, he has clerked for Judge Guido Calabresi and Judge John Gleeson, and his scholarship has been widely cited, including by appellate courts internationally.
Prof. Dr. Jan Kleinheisterkamp, an international arbitrator and mediator based in Brussels, spent more than two decades in academia at LSE before transitioning full-time to arbitrating complex disputes. Since 2006, he has served as arbitrator in ICC, LCIA, UNCITRAL, and emergency proceedings across sectors such as finance, energy, infrastructure, pharmaceuticals, and investor–state matters. He conducts proceedings in five languages: English, Spanish, Portuguese, German, and French.
Julia E. Sullivan, JD, LLM, FCIArb, an international arbitrator and CIArb Board Member, has received over 150 appointments as Tribunal Chair, Tribunal Member, Emergency Arbitrator, or Sole Arbitrator. Her practice focuses on energy, infrastructure, and finance, and she is a member of ArbDB Chambers. Previously, she chaired a global Energy Regulation, Markets & Enforcement practice and has taught graduate-level courses in international arbitration, international energy policy, and project finance.
Register here for this free event:
https://lse.zoom.us/j/89548625228?pwd=OiwFJTPaXIVCcHf6LuHmIiAoj0W84q.1
PANELIST BIOS
Prof. Dr. Paul MacMahon
Dr. MacMahon is an Associate Professor of Law at the LSE Law School and the Director of the Executive LLM Programme. His primary interests are contracts, commercial law, and international arbitration. Before coming to the LSE, Paul taught at Harvard and Cambridge. He studied at Oxford (BA, BCL, DPhil) and Harvard (JD) and served as a law clerk in the United States for Judge Guido Calabresi and Judge John Gleeson. Paul also worked as a litigation lawyer in New York City and remains a member of the New York Bar. In addition to teaching at LSE, Paul is a regular Visiting Professor at Católica Global School of Law in Lisbon. His work has been cited in the English and Singapore Courts of Appeal, and he has served as an expert on English law in foreign court proceedings.
Julia E. Sullivan, JD, LLM, FCIARB
Julia E. Sullivan is an American lawyer, English solicitor, and international arbitrator specializing in energy, infrastructure, and finance. She with an experienced arbitrator with more than 150 appointments as Tribunal Chair, Tribunal Member, Emergency Arbitrator, or Sole Arbitrator in disputes involving parties from the U.S., Latin America, Europe, Africa, and Asia.
Ms. Sullivan is a Member of ArbDB Chambers. Prior to that, she chaired the Energy Regulation, Markets and Enforcement practice at a global law firm, where she also served on the Steering Committee of the Global Energy & Transactions practice.
Ms. Sullivan holds graduate degrees in law and business from common law and civil law jurisdictions. She has taught college and graduate-level courses on international arbitration, international energy policy, and project finance.
Prof. Dr. Jan Kleinheisterkamp
Dr. Kleinheisterkamp works as an international arbitrator and mediator, based in Brussels. After 20 years in academia, most of them at the Law School of the London School of Economics, he changed gears when turning 50 in 2021 – focusing on his practice as an arbitrator, which he had started in 2006 alongside his academic work.
Dr. Kleinheisterkamp has extensive experience as a sole arbitrator, presiding arbitrator and co-arbitrator in ICC, LCIA and UNCITRAL proceedings, as well as in emergency arbitrator proceedings and expert determination. Since 2006, he has arbitrated a wide array of complex matters, from international finance to construction, pharmaceuticals to agriculture, energy and natural resources to infrastructure, and from international trade to investor-state disputes, with a total value exceeding a billion U.S. dollars. A German–Peruvian double national, he works and conducts arbitrations in English, Spanish, Portuguese, German and French. Since 2019, he has also been developing his skills in international mediation.
