
Our Experience

Our Experience
We are experts in dispute resolution.
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We have acted in many of the most important cases that have shaped the field of investment arbitration and foreign investment law. We have acted for both investors and States in dozens of high-stakes investment disputes.
Investment Treaty Arbitration
• Represent a UK energy exploration company and other UK shareholders in a dispute against a Western European state under the Energy Charter Treaty regarding denial of a permit to develop an offshore oil and gas field.
• Represented a US energy major in an investment treaty dispute with an East Asian State over tax assessments on oil and gas operations.
• Represented ConocoPhillips in ConocoPhillips v. Bolivarian Republic of Venezuela, ICSID Case No. ARB/07/30, regarding the expropriation of oil assets in Venezuela. The tribunal awarded the investors over USD 8 billion in damages.
• Represented Burlington Resources in Burlington Resources Inc. v. Republic of Ecuador, ICSID Case No. ARB/08/5, regarding the unlawful application of windfall profits tax on oil production and operations. The tribunal awarded over USD 300 million in damages.
• Represented Rockhopper in Rockhopper Exploration Plc v. Italy, ICSID Case No. ARB/17/14, regarding the denial of an environmental permit to develop an offshore oil and gas project. The tribunal awarded over EUR 190 million in damages.
• Represented Chevron in Chevron Corporation and Texaco Petroleum Corporation v. Ecuador, PCA Case No. 2009-23, regarding denial of justice relating to a USD 9.5 billion judgment rendered by the Ecuadorian courts against Chevron over alleged environmental contamination.
• Represented Eurus Energy Holdings in Eurus Energy Holdings Corp. v. Spain, ICSID Case No. ARB/16/4, regarding wind energy investments.
• Represented the Government of St. Lucia in an investment contract dispute under the ICSID Rules brought by a U.S. company regarding offshore hydrocarbons investments (RSM Production Corp. v. St. Lucia, ICSID Case No. ARB/12/10).
• Represented PTT Energy Resources, Thailand’s largest State-owned energy company, in a billon-dollar investment treaty claim against Egypt before the Egyptian courts arising from its investment in a company that built, owns, and operates the “Peace Pipeline” between Israel and Egypt.
• Advised a Dutch energy major in a potential dispute against Mexico under the Netherlands-Mexico bilateral investment treaty regarding the denial of a permit to develop a shale gas field.
• Advised investors in a coking facility on potential claims under the Energy Charter Treaty against Bosnia and Herzegovina regarding mistreatment of the company and its investors.
• Advised Asian and European oil majors regarding potential investment treaty claims against the Indonesian government arising from an offshore hydrocarbons production sharing contract.
Investment Treaty Arbitration
Energy Sector
• Represented Crystallex in Crystallex International Corporation v. Bolivarian Republic of Venezuela, ICSID Case No. ARB(AF)/11/2, regarding the denial of an environmental permit needed to develop a gold mine. The tribunal awarded the investor over USD 1.4 billion in damages.
• Represented Odyssey Marine Exploration, Inc. v. United Mexican States, ICSID Case No. UNCT/20/1, regarding the denial of a phosphate concession. The tribunal awarded the investor over USD 37 million in damages.
• Represented the individual claimants in Agarwal and Mehta v. Republic of Uruguay, PCA Case No. 2018-04, regarding the denial of an environmental permit and mining concession to develop a mining site. The tribunal dismissed the claims on jurisdictional grounds, but the claimants successfully annulled the jurisdictional award and recommenced proceedings.
• Represented Türkiye in Westwater Resources, Inc. v. Republic of Türkiye, ICSID Case No. Arb/18/46 regarding the rescission of a permit to develop a mining site. The tribunal awarded the investor its investment costs, which were less than 10 percent of what the investor claimed in the arbitration.
• Represented Türkiye in Ipek Investment Limited v. Republic of Türkiye, ICSID Case No. ARB/18/18, regarding seizure of assets and allegations of terrorism financing. The tribunal dismissed the case on the grounds of abuse of process.
• Represented Türkiye in Alamos Gold v. Republic of Türkiye, ICSID Case No. ARB/21/33, regarding the denial of permits to develop a mining site.
• Represented Chinese investors in Beijing Shougang and others v. Mongolia, PCA Case No. 2010-20, regarding the termination of mining licenses.
• Advised a steel company in a dispute against the Philippines arising under a bilateral investment treaty regarding the expropriation of a steel plant and related operations.
• Advised a major Japanese trading house on potential investment treaty claims against a South American State in the electricity and mining sectors.
Investment Treaty Arbitration
Metals & Mining Sectors
• Represent a satellite company in a dispute against the Russian Federation under the UK-Russian bilateral investment treaty regarding armed conflict and sanctions issues.
• Represented Türkiye in Cascade Investments NV v. Republic of Türkiye, ICSID Case No. ARB/18/4, regarding investments in the media sector. The tribunal dismissed the case on the grounds of abuse of process.
• Represented Türkiye in Libananco Holdings Co. v. Republic of Türkiye, ICSID Case No. ARB/06/8, regarding investments in the power generation sector. The tribunal dismissed the claims for failure by the investors to prove ownership of the investments during the relevant period of time.
• Represented Vietnam in Trinh Vinh Binh and Binh Chau Joint Stock Co. v. Vietnam, PCA Case No. 2015-23, regarding purported real estate investments by a dual-national investor. The tribunal awarded the investor only four percent of the damages claimed.
• Represented Korea in Dayyani and others v. Republic of Korea, PCA Case No. 2015-38, regarding an aborted M&A transaction in the electronics industry, and in related set-aside proceedings before the English courts.
• Advised real estate companies and the estate of a deceased UK national in a dispute with Azerbaijan under the UK-Azerbaijan bilateral investment treaty regarding real estate investments.
• Advised UK and Irish shareholders in a dispute with the Czech Republic under the UK-Czech bilateral investment treaty regarding an investment in the satellite and aviation sectors.
• Advised parties in investment treaty disputes against the Republic of Argentina arising from measures imposed by the government during the Argentina financial crisis of 1998 to 2002.
Investment Treaty Arbitration
Other Sectors
• Represent a satellite company in a dispute against the Russian Federation under the UK-Russian bilateral investment treaty regarding armed conflict and sanctions issues.
• Represented Türkiye in Cascade Investments NV v. Republic of Türkiye, ICSID Case No. ARB/18/4, regarding investments in the media sector. The tribunal dismissed the case on the grounds of abuse of process.
• Represented Türkiye in Libananco Holdings Co. v. Republic of Türkiye, ICSID Case No. ARB/06/8, regarding investments in the power generation sector. The tribunal dismissed the claims for failure by the investors to prove ownership of the investments during the relevant period of time.
• Represented Vietnam in Trinh Vinh Binh and Binh Chau Joint Stock Co. v. Vietnam, PCA Case No. 2015-23, regarding purported real estate investments by a dual-national investor. The tribunal awarded the investor only four percent of the damages claimed.
• Represented Korea in Dayyani and others v. Republic of Korea, PCA Case No. 2015-38, regarding an aborted M&A transaction in the electronics industry, and in related set-aside proceedings before the English courts.
• Advised real estate companies and the estate of a deceased UK national in a dispute with Azerbaijan under the UK-Azerbaijan bilateral investment treaty regarding real estate investments.
• Advised UK and Irish shareholders in a dispute with the Czech Republic under the UK-Czech bilateral investment treaty regarding an investment in the satellite and aviation sectors.
• Advised parties in investment treaty disputes against the Republic of Argentina arising from measures imposed by the government during the Argentina financial crisis of 1998 to 2002.
Investment Treaty Arbitration
Other Sectors
Mascarenhas Law has significant experience representing and advising parties in complex commercial and construction arbitrations. We are especially qualified to handle matters with a U.S. connection, such as one or more of the parties to a dispute being of U.S. nationality, the governing laws applicable to the dispute being U.S. state or federal laws, or the seat of arbitration being located within the United States.
The firm represents clients in a broad range of industries, including chemicals, energy (LNG, oil, nuclear, electricity, power, renewables), metals and mining, aerospace, finance, manufacturing, hospitality, life sciences, and luxury goods. The firm also has experience in private equity and M&A disputes arising under share purchase, joint venture, shareholder, and partnership agreements.
Commercial and Construction Arbitration
• Represented a consortium of LNG producers (sellers) in a gas-pricing dispute with an Asian buyer regarding the pricing of LNG supplied under long-term agreements.
• Represented a global energy major in an ICC arbitration against Venezuela’s State-owned oil company regarding the termination of a joint venture in Texas, concerning the exercise of a call option under a New York law-governed contract.
• Represented a major Thai conglomerate in two parallel billion-dollar ICC arbitrations arising from a wind energy investment.
• Represented a global energy supermajor in a commodities trading dispute with a Chinese counterparty administered by SIAC.
• Represented a global private equity firm’s Singaporean and Indian subsidiaries in parallel SIAC and Indian court proceedings relating to energy investments in India.
• Represented a steel company in a dispute with the Republic of Nigeria arising under a concession agreement to mine iron ore and a partnership dispute with a state-owned steel company.
• Advised a major Japanese trading house on potential contractual claims against South American State-owned entities in the electricity and mining sectors.
• Advised the Nippon Asahan consortium of Japanese trading houses in a billion-dollar potential ICSID contract arbitration with the Government of Indonesia, relating to the termination of a hydroelectric and aluminum project concession agreement in North Sumatra.
• Represented a member of a major consortium of industrial corporations in a dispute concerning rights arising from a mining agreement with a West African government.
• Represented an Austrian energy company in a dispute with an Eastern European state-owned entity regarding photovoltaic infrastructure.
• Represented a Middle Eastern regional government in a dispute with several Middle Eastern oil and gas companies regarding natural gas assets.
• Represented a German materials manufacturer in a dispute with a multinational chemical producer regarding emissions allowances.
Commercial and Construction Arbitration
Energy & Mining Sectors
• Represented a Colombian owner against U.S. contractor in a construction dispute over a refinery in Colombia.
• Represented a U.S. contractor in a construction dispute with an Indian public sector undertaking (state-owned company) over highway construction and tolls.
• Represented a Turkish contractor in a construction dispute with a joint-venture owner over the construction of a nuclear plant in Türkiye.
• Represented a U.S. owner in a construction and commercial dispute with a U.S. contractor over the construction of LNG terminals in the United States.
• Represented the roadworks ministry of an African State in a construction dispute brought by a Japanese company under the ICC Rules.
Commercial and Construction Arbitration
Construction Disputes
• Represented a U.S. luxury goods company in a dispute with a Swiss luxury goods company over the dissolution of a long-term venture.
• Represented the CEO of a pharmaceutical company in an employment dispute regarding unlawful termination.
• Represented an Israeli life sciences company in a dispute with a U.S. distributor regarding the distribution of products.
• Represented an international hospitality franchisor in a commercial dispute with a hotel owner/franchisee over termination of a hotel management agreement.
• Represented a U.S. chemicals company in a dispute with another U.S. chemicals company regarding supply/pricing and antitrust claims.
• Represented a Japanese trading house in an ICC arbitration against a Chinese company relating to the termination of a long-term, New York law-governed contract for mineral supplies to China.
• Represented a Japanese technology company in an ICC arbitration against the police force of a central Asian state regarding a contract for fingerprint recognition technology.
• Represented a Dutch materials manufacturer in a dispute with a multinational chemical producer regarding operations at a European petrochemical facility.
• Represented a Japanese manufacturer in a contract dispute with a Korean electronics company regarding consumer electronics components.
• Represented a U.S. asset management firm in a dispute concerning misappropriation of trade secrets by former employees.
• Advised the buyer in a post-M&A dispute with the seller over breaches of representations and warranties and purchase-price adjustment involving accounting issues.
• Advised a multi-national automotive company in a potential billion-dollar dispute over the exercise of complex, inter-related put options and the termination of a long-term manufacturing joint venture in Central Asia.
• Advised a multinational food and beverage company regarding a potential ICC arbitration arising from its prospective termination of licensing agreements and exit from a joint venture in Indonesia.
• Advised a major U.S. importer, developer, and distributor of agricultural products in an ICDR arbitration against an Indian supplier, including advising on award enforcement strategy in India and the U.S.
• Advised a U.S. aerospace company in a pre-arbitration dispute with an intergovernmental organization regarding development and delivery of aircraft.
Commercial and Construction Arbitration
Other Sectors
Members of Mascarenhas Law have lived and worked all over the world, including in the United States, India, the Middle East, East and Southeast Asia, Europe, North and West Africa, and South America. Accordingly, we have extensive and well-developed relationships with counsel in diverse jurisdictions and know how to work with lawyers and clients who are trained in different legal traditions. We are therefore well placed to coordinate global and parallel disputes unfolding in arbitral hearings and courtrooms in multiple jurisdictions.
The firm is especially qualified to:
• Obtain U.S.-based discovery in aid of foreign (non-U.S.) proceedings under 28 U.S.C. § 1782.
• Enforce domestic and foreign (non-U.S.) arbitration awards and foreign (non-U.S.) judgments in U.S. courts.
• Seek annulment / set-aside of domestic and foreign (non-U.S.) arbitration awards in U.S. courts.
• Obtain interim measures in support of domestic and international arbitration in U.S. courts.
• Use post-judgment discovery and execution tools available under U.S. state and federal laws in collection proceedings over unpaid arbitration awards and judgments.
• Represent parties (sovereign and non-sovereign) in disputes involving application of the Foreign Sovereign Immunities Act.
• Act as strategic advisors and coordinating counsel for foreign proceedings and multi-jurisdictional litigations.
Mascarenhas Law’s U.S. litigation experience includes:
• Represented a New York private equity firm in lawsuits before more than a dozen U.S. state and federal courts, and in related bankruptcy proceedings, arising from the firm’s investment in a manufacturing company, resulting in a comprehensive global settlement.
• Represented a U.S. cybersecurity company in an interlocutory appeal before the California state court of appeals concerning access to intellectual property and questions of civil procedure.
• Represented an employee pursuing claims against a former employer under the Fair Labor Standards Act and New York Labor Law before the Court of Appeals for the Second Circuit.
• Represented a client in post-conviction proceedings concerning ineffective assistance of trial counsel before the Court of Appeals for the Second Circuit.
• Represented a criminal defendant charged with financial crimes in plea negotiations and at sentencing before the Southern District of New York.
• Represented a property owner in a civil forfeiture action in the Western District of North Carolina.
• Represented custodial parents petitioning for the return of minor children under the Hague Convention on the Civil Aspects of International Child Abduction before the Eastern District of New York.
• Advised a U.S. company and coordinating its strategy for enforcing an arbitral award in multiple U.S. states.
Our experience representing or advising (in close coordination with local counsel teams in the relevant jurisdictions):
• A global energy supermajor in four litigations before the Singapore High Court, involving complex commodities trading and trade finance issues.
• A global financial institution in proceedings before the Malaysian courts related to the 1MDB scandal.
• A Middle Eastern telecommunications company in appellate proceedings before the Supreme Court of Indonesia regarding a VAT assessment.
• A global private equity firm in parallel litigations before the Indian courts under Section 9 of the Indian Arbitration and Conciliation Act.
• A Japanese company in an enforcement action in Saudi Arabian courts of an ICC award against Saudi Arabian assets.
• The Republic of Korea in its application before the courts of England and Wales to set aside an arbitral award.
• A U.S. company on its strategy for enforcing an arbitral award in India.
• A Canadian petrochemical company in a dispute arising out of a JVA before the Court of Appeal of Alberta, Canada.
U.S. and Foreign Litigation
Mascarenhas Law has significant experience advising and representing parties in public international law matters, especially in the areas of treaty interpretation and application and international environmental laws, including climate change laws.
• Advised a Middle Eastern government on international humanitarian law and international human rights law issues arising from Arab Spring in 2011, including the establishment and working of a commission of inquiry to investigate potential abuses of international law.
• Represented a South American government in a maritime delimitation proceeding before the International Court of Justice against a neighboring South American government.
• Represented the UN Special Rapporteurs on Toxics and Human Rights (Marcos Orellana), Human Rights and the Environment (David Boyd), and the Right to Development (Surya Deva) in a submission to the Inter-American Court of Human Rights in the advisory opinion proceedings on climate change.
• Represented the UN Special Rapporteurs on Toxics and Human Rights (Marcos Orellana), Human Rights and the Environment (David Boyd), and Human Rights and Climate Change (Ian Fry) in a submission to the International Tribunal for the Law of the Sea (ITLOS) in the advisory opinion proceedings on climate change.
• Advised a U.S.-based NGO on a range of international law issues, including the war crimes of pillage and denial of quarter and Russian violations of international humanitarian law in Ukraine.
• Advised a U.S. investor on potential human rights issues arising from a contemplated telecoms investment in Myanmar.
• Advised sovereign pension funds and other investors in their lobbying efforts with respect to the negotiation of major bilateral and multilateral investment treaties.
• Advised corporates on structuring foreign investments to obtain investment treaty protection.
Public International Law
Mascarenhas Law also has significant experience advising businesses on their human rights obligations. Viren Mascarenhas served as the inaugural chair of the Business & Human Rights Committee of the New York City Bar Association from 2019 to 2022.
Representative examples include:
• Represented two U.S. energy majors in proceedings before the national human rights commission of a South Asian government regarding the impact of the companies’ business operations on climate change and sea level rise.
• Advised a U.S. defense company on interpretation and analysis of a weapons and terrorism treaties to ensure that the weapons being manufactured complied with applicable international laws.
• Advised several U.S. energy majors on human rights disclosures required under a range of laws, including France’s Duty of Vigilance Law, the UK Modern Slavery Act, Norway’s Transparency Act, and the European Union Corporate Sustainability Due Diligence Directive.
Business and Human Rights
Note that some of the matters listed above were handled prior to the founding of Mascarenhas Law PLLC.
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