Dechamps International Law
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International arbitration boutique Dechamps International Law represents corporations, individuals, states and state entities in investment treaty and commercial disputes. The firm is currently counselling clients in multiple investment arbitrations, with opponents including Colombia, Uruguay and Venezuela. London-based Jean Paul Dechamps (founding partner) leverages his extensive experience in major arbitration teams of global law firms to provide professional counsel to his clients. Dechamps speaks English, Spanish and Portuguese fluently. Gustavo Topalian, noted for his broad experience in arbitrations relating to the mining, energy and infrastructure sectors, oversees the firm’s Buenos Aires office, while Juan Pomés is the managing partner of the firm’s Montevideo office. Counsel Pablo Jaroslavsky excels in commercial and investment treaty disputes, with a special emphasis on the telecoms, energy and natural resources sectors.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- 'Among the partners, I must highlight Gustavo Topalian, who is excellent. Gustavo does a great job in case management and legal strategy. The customer service Gustavo provides is undoubtedly top-notch.'
- 'Juan Pomés is an expert in investment arbitration, with extensive experience in mining and natural resources issues in general. He is intelligent, focused, and always attentive to providing the best service to clients. As for counsel, I must mention Pablo Jaroslavski, who does an excellent job.'
Key clients
- South32 SA Investments Limited
- Glencore International
Work highlights
Representing South32 Investments Limited in an arbitration against Colombia under the ICSID Arbitration Rules and the United Kingdom-Colombia BIT in connection with measures that affected the claimant’s investments in a mining project.


