Services
J. J. Gass provides independent arbitrator and counsel services in complex international commercial and investor–state disputes. With 30 years of dispute-resolution experience and participation in more than 70 arbitrations, he brings practical cross-border insight, careful judgment, and a focused approach to each instruction.
Arbitrator Appointments
J. J. is available for appointment in international arbitrations as:
Sole arbitrator
Presiding or chair arbitrator
Co-arbitrator
He has served in arbitrations under major institutional rules and has experience across a range of commercial sectors, including energy, finance, construction, shipping, sale of goods, and post-M&A disputes. His work includes proceedings conducted under LCIA and ICC rules.
An Independent Appointment Option
As a sole practitioner, J. J. offers parties and appointing authorities an independent, cost-conscious option for tribunal appointments. His practice can also reduce the conflict-of-interest concerns that may arise when considering candidates affiliated with larger law firms.
Suitable for:
Commercial arbitration, cross-border contractual disputes, sector-specific disputes, and investor–state matters.
International Arbitration Counsel
J. J. acts as counsel in international arbitrations and works alongside legal teams where his experience can add strategic depth, international perspective, and familiarity with different arbitral rules and legal systems.
He has acted in more than 50 arbitrations as counsel under the rules of the ICC, LCIA, SCC, ICSID, ICSID Additional Facility, UNCITRAL, and other institutions.
Counsel Support Includes
Case strategy and early dispute assessment
Arbitration agreement and jurisdictional issues
Written submissions and evidence strategy
Hearing preparation and advocacy
Tribunal procedure and arbitral-seat issues
Coordination with co-counsel and specialist advisers
Post-award strategy, including enforcement and set-aside matters
J. J. frequently collaborates with boutique firms and legal teams that require additional international arbitration experience for a specific matter or stage of proceedings.
Investor–State Arbitration
J. J. has substantial treaty-arbitration experience, including more than 20 international treaty cases. Much of this work has involved investor–state disputes under the ICSID framework.
He has represented seven states across several continents, as well as numerous investor-claimants. His experience includes disputes connected with government measures, investment incentives, energy projects, mining projects, and public international law issues.
Relevant Experience
ICSID and ICSID Additional Facility proceedings
Investment treaty claims
Jurisdiction and admissibility issues
State representation and investor representation
Renewable-energy incentive disputes
Mining and natural-resources disputes
Public international law questions
J. J. has also been appointed to ICSID’s Panel of Arbitrators.
Cross-Border Legal Experience
International disputes often require counsel and arbitrators who can work comfortably across different legal traditions. J. J. has experience with matters governed by:
Common law, including England & Wales and New York law
Civil law, including French, Japanese, and Swiss law
Middle Eastern legal systems, including Qatar and UAE law
Islamic law-based civil-law systems
Public international law
This breadth of experience helps him approach disputes with awareness of the legal, procedural, and commercial differences that may affect an international arbitration.
