Gustavo has over 15 years of professional experience practicing international arbitration at leading law firms in New York, Geneva, and Paris. All these firms are ranked as Band 1 or Band 2 in international arbitration by Chambers and Partners. Two of these firms are consistently ranked as top-30 GAR firms, and one was a top-3 GAR firm when he worked there. He served as tribunal assistant for the three of only a handful of arbitrators listed by Chambers and Partners as "star individuals" in Switzerland and France. 
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Currently he works closely with an English QC from one of the most preeminent sets of barristers' chambers worldwide. In 2021, Gustavo and this QC co-taught a summer course at the Hague Academy of International Law. 
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Whether as party representative, arbitrator, or tribunal secretary or assistant, throughout his career Gustavo has been involved in more than 40 international arbitrations in a wide spectrum of jurisdictions and industries. 
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He has also offered arbitration-related advice; actively participated in high-level negotiations with an arbitration component; and litigated before New York courts on a range of issues, often with an international component.