Sofia de Sampaio Jalles is a partner at Armesto & Asociados, a firm of arbitrators founded by Juan Fernández-Armesto. Sofia acts as arbitrator and secretary to arbitral tribunals in international and domestic arbitration proceedings, both ad hoc and administered, involving commercial and investment disputes. Most of the cases are administered by ICC, ICSID, PCA and Spanish arbitral institutions. As to the ad hoc arbitrations, most of them are subject to the UNCITRAL Rules. Sofia’s work has been recognized by Who’s Who Legal “Future Leaders (Non-Partners)” in international arbitration in 2021 and 2022.