• Ms. Brown de Vejar leads the team representing a US energy giant in a US$30 million, Spanish language, Mexican law LCIA arbitration claim against the principal contractor in a dispute arising out of the electromechanical works on a hydroelectric project in Mexico.
  • Ms. Brown de Vejar is lead counsel representing two investors in connection with their BIT claim arising out of investments in the renewable energy sector.
  • Ms. Brown de Vejar is part of the team defending Lithuania in a US$300 million case brought in relation to the bankruptcy of Bankas Snoras (Fund for Protection of Investor's Rights in Foreign States v. Republic of Lithuania, UNCITRAL Case).
  • Ms. Brown de Vejar is lead counsel representing a tech sector client in an English language, San Francisco-seated ICC arbitration arising out of breach of a Delaware law confidentiality agreement
  • Ms. Brown de Vejar is lead counsel representing an energy sector client in an English-language US$100 million ICC arbitration arising out of a methanol plant project. The arbitration is seated in New York, with New York law and Delaware law applicable.
  • Ms. Brown de Vejar is one of the lead counsel representing a retail sector client in a Spanish-language ICC arbitration seated in Mexico City arising out of a long term contract for the supply of hydro-electricity.
  • Ms. Brown de Vejar is part of the team representing a national aviation authority in a commercial UNCITRAL arbitration with an International Organization.
  • Ms. Brown de Vejar was one of the lead counsel that secured a comprehensive victory for Turkmenistan in a US$570 million ICSID arbitration - all claims against Turkmenistan were dismissed and the claimant was ordered to pay US$1.7 million in costs. The case (Içkale Insaat Limited Sirketi v. Turkmenistan, ICSID Case No. ARB/10/24) involved 13 different civil engineering EPC contracts for facilities ranging from hotels and schools, to a man-made canal. The same team went on to defeat the claimant's request for a supplementary decision and rectification of the award in mid-2017.
  • Ms. Brown de Vejar acted for a Mexican state-owned entity in an LCIA arbitration relating to a US$45 million energy sector infrastructure project. This arbitration, which commenced in early 2017, is ongoing
  • From 2017–January 2019, Ms. Brown de Vejar was one of the lead counsel in a multi-billion dollar ICC arbitration for Turkmengas, Turkmenistan's State-owned gas entity, against the National Iranian Gas Company. The arbitration is ongoing.
  • Ms. Brown de Vejar was one of the lead counsel for Turkmenistan in a US$450 million ICSID arbitration involving claims arising out of 31 distinct EPC contracts for the construction of a range of facilities, including an industrial steel mill, a water treatment plant and a recycling plant (Muhammet Çap & Sehil Inşaat Endustri ve Ticaret Ltd. Sti. v. Turkmenistan, ICSID Case No. ARB/12/6). This arbitration is ongoing.
  • Ms. Brown de Vejar defended Venezuela in the ICSID case Saint-Gobain Performance Plastics Europe v. Bolivarian Republic of Venezuela (ICSID Case No. ARB/12/13). In December 2016, the Tribunal majority issued a decision accepting all of Venezuela's arguments on damages except one, including agreeing to apply a nominal discount rate of 19.88%, and to reduce the claimant's claimed future profits by 25% based on Venezuela's analysis that a willing buyer would have to spend at least that much on marketing and distribution.
  • Ms. Brown de Vejar was a core member of the arbitration team which represented Algeria and its national oil company, Sonatrach, in parallel UNCITRAL and ICSID arbitrations brought by Anadarko and Maersk in 2009–2012, relating to the introduction of a windfall profits tax on petroleum operations. The arbitration was discontinued when the parties reached a settlement.