Featured Lawyers
Viren Mascarenhas
Founding Partner
Mascarenhas Law PLLC is delighted to announce that Chambers and Partners ranked the firm in the 2026 USA Spotlight Guide for International Arbitration. This is an incredible achievement given that the firm has been in existence for less than six months.
Chambers and Partners wrote in its review: “Mascarenhas Law PLLC is highlighted for its strength in international arbitration. The firm routinely handles investment treaties disputes for its corporate clients. The team is also experienced in handling commercial and construction arbitrations. Clients of the firm include Fortune 500s and foreign governments.” This is an incredible achievement given that the firm has been in existence for less than six months.
Chambers and Partners also identified Viren Mascarenhas as a key contact in the New York office. He is ranked individually as counsel in both Chambers Global and Chambers USA for international arbitration. Chambers notes, “Viren Mascarenhas . . . has a growing reputation for his adept handling of arbitration matters and acts for clients on both investment treaty and commercial arbitrations.” Peer and client reviews include, “Viren is good to work with”; “He knows the space extremely well”; and “Viren is incredibly knowledgeable, calm and straight to the point. He is clear in his advice. He doesn't hide the truth and is very up-front.”
Viren is the Founding Partner of Mascarenhas Law PLLC, which is a disputes boutique headquartered in New York focusing on arbitration (commercial, construction, investment) and U.S. litigation, in particular relating to arbitration and non-U.S. proceedings. Members of the firm, which includes Margaret Artz and Lexi Menish, also serve as arbitrators and mediators.
Viren has been ranked by the leading directories in the field of international arbitration and public international law. Recognition of his expertise and achievements include:
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Chambers USA and Chambers Global: International Arbitration, 2020 to present. The feedback from Chambers and client testimonials include: “Sources regard him as ‘bright, capable and a really strong advocate;’” “he is someone who has a deep understanding of investment treaty arbitration and has vast experience in the field;” and Viren is “a lawyer you want in your corner.”
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Legal 500: International Arbitration, 2018 to 2024 (“he stands out for his additional specialization in public international law and human rights”)
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Lexology Index: Thought Leader in the categories of Arbitration, Mining and Energy, 2017 to present
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2024 Lexology Awards: North America 2024, Litigation and Arbitration Award
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2024 Lexology Client Choice Awards, Arbitration & ADR, United States: New York
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The Best Lawyers in America: International Arbitration - Commercial, 2024
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Lawdragon 500 Leading Global Litigators, 2021 (inaugural list), 2023, 2024
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National South Asian Bar Association: Rising Star, 2019
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National LGBT Bar Association: Rising Star, 2019
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Euromoney Legal Media Awards: Rising Star in international commercial arbitration, 2019
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Latinvex (Rising star for disputes in Latin America), 2019
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Crain's New York Business: 40 under 40 List, 2019
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American Bar Association: Finalist for National Most Outstanding Young Lawyer, 2016
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Law360: Rising Star in Energy, 2015
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New York Law Journal: Rising Star, 2014
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Admitted to the Bar in New York (2006 to present)
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Columbia Law School, Lecturer-in-Law, 2009 to present (currently teaching an upper-level seminar on international commercial arbitration)
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Fellow of the Chartered Institute of Arbitrators (FCIArb), 2020
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CPR Institute, Arbitration Committee (Chair, 2023 to present; Vice-Chair, 2020 to 2023)
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CPR Institute, Distinguished Panel of Neutrals (2022 to present)
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American Arbitration Association/International Centre for Dispute Resolution, Panel of Arbitrators (2021 to present)
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New York City Bar Association, Member
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American Bar Association, Member
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International Bar Association, Member
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University of London, Master of Laws Degree (LLM) with Distinction, 2009
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Columbia Law School, Juris Doctor Degree (JD), 2005. James Kent Scholar (top 1-3% of class); Harlan Fiske Stone Scholar (top 33% of class); and Parker Certificate for Achievement in Foreign and International Laws
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University of Richmond, Bachelor of Arts Degree (BA), summa cum laude and Phi Beta Kappa, 2002
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London School of Economics, General Course Diploma, Economics, 2021. Specialization: International Dispute Resolution
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