People

Silvia M. Marchili specializes in complex international arbitration cases involving investment as well as commercial claims. A partner in our International Arbitration practice, Silvia is a bilingual, civil and common law trained lawyer. She handles international arbitration and litigation matters involving Latin America and Africa, and a variety of sectors, including oil and gas, power, construction, mining, air transportation and infrastructure.

With over 15 years of experience, Silvia represents parties in investment arbitrations before international tribunals under the World Bank's International Centre for the Settlement of Investment Disputes Convention, as well as under other arbitration rules. In recent cases, she has obtained some of the largest ICSID Bilateral Investment Treaty awards ever received by foreign investors. An expert in investment arbitration, Silvia coauthored, with R. Doak Bishop, the treatise Annulment Under the ICSID Convention (Oxford University Press).

In commercial arbitrations, Silvia has represented parties in cases under the International Chamber of Commerce, London Court of International Arbitration, UN Commission on International Trade Law, Inter-American Commercial Arbitration Commission, International Centre for Dispute Resolution and Houston Maritime Arbitrators Association rules.

Originally from Buenos Aires, Silvia is fluent in Spanish and English, and has working knowledge of Italian and French, along with a basic understanding of German. She is a frequent author and speaker on arbitration and dispute resolution.

Chambers Global ranked Silvia as an expert in dispute resolution and Latin Lawyer selected her as a leading practitioner in Latin America. She is active in several international law and international arbitration organizations, serving as a Member of the FDI Moot Advisory Board, Chair of the Young ITA and North America regional representative at the ICC Young Arbitrators Forum.

Full Bio

Credentials

J.D., University of Buenos Aires, Argentina

M.A., Queen Mary College, University of London, with merit

Buenos Aires Bar Association

Admitted to practice in Buenos Aires, Argentina.

ICDR Young & International

LCIA Young & International

Young ICCA

AIPN

French

German

Italian

Latin

Spanish

Matters

Represented a Peruvian oil & gas company in a commercial arbitration against a state-owned oil company, which resulted in a substantial reduction of the royalties our client owed for the natural gas and liquids they produced.

Represented a major oil & gas company in an investment arbitration against the Republic of Argentina. We obtained a favorable award on damages, which was significantly higher than the amount granted by other energy companies who brought similar claims in analogous proceedings.

Represented an owner in a construction dispute in Panama involving change orders and price adjustment claims; our client reached a very favorable settlement agreement.

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Matters

Represented a Peruvian oil & gas company in a commercial arbitration against a state-owned oil company, which resulted in a substantial reduction of the royalties our client owed for the natural gas and liquids they produced.

Represented a major oil & gas company in an investment arbitration against the Republic of Argentina. We obtained a favorable award on damages, which was significantly higher than the amount granted by other energy companies who brought similar claims in analogous proceedings.

Represented an owner in a construction dispute in Panama involving change orders and price adjustment claims; our client reached a very favorable settlement agreement.

Represented several major oil & gas companies in their investment cases against a Latin American State and obtained awards in the hundreds of millions of Dollars.

Representing an international airline in an investment arbitration claim against Venezuela involving a dispute over repatriation of proceeds from domestic ticket sales.

Representing Spanish investors in their arbitration case for the expropriation of an airline in Latin America.

Representing a U.S. energy company and its UK partner in an ICSID Additional Facility conciliation proceeding against Equatorial Guinea and involving a Production Sharing Contract.

Representing a U.S. energy company in obtaining an ICSID award against Argentina due to the abrogation of dollar tariffs and inflationary adjustments in the gas transportation sector.

Representing a Spanish company in its ICSID case against Venezuela for the expropriation of its assets in the country.

Representing a U.S. water company in a case arising from the termination of a 30-year concession.

Representing a Luxembourg energy company in its ICSID case for the abrogation of dollar tariffs and inflationary adjustments and other regulatory takings in the power sector.

Representing a German company in its arbitration case arising from the termination of a contract to create a system of migration control and personal identification.

Representing a Spanish telecommunications company in its ICSID case against a Latin American State for a series of regulatory measures

Representing a U.S. energy company in its arbitration claim against a Latin American State for imposing confiscatory provincial stamp taxes and abrogating dollar tariffs and automatic adjustments in the gas transportation sector;

Representing a U.S. energy company in an ICSID arbitration for the elimination of dollar tariffs and inflationary adjustments in the gas transportation sector

Representing a Dutch company in its arbitration case for the termination of a contract to create an informatics system and to provide Argentina with equipment for the control and administration of the radio-electric spectrum

Representing an Italian company in its arbitration case for the unlawful termination of a water and sewage concession contract

Representing a U.S. water and sewage company in its case against Argentina for measures taken against its investment

Representing an Italian company in a case for measures taken against investments in a highway concession

Matters

Represented a Peruvian oil & gas company in a commercial arbitration against a state-owned oil company, which resulted in a substantial reduction of the royalties our client owed for the natural gas and liquids they produced.

Represented a major oil & gas company in an investment arbitration against the Republic of Argentina. We obtained a favorable award on damages, which was significantly higher than the amount granted by other energy companies who brought similar claims in analogous proceedings.

Represented an owner in a construction dispute in Panama involving change orders and price adjustment claims; our client reached a very favorable settlement agreement.

See more
Icon close

Close

Matters

Represented a Peruvian oil & gas company in a commercial arbitration against a state-owned oil company, which resulted in a substantial reduction of the royalties our client owed for the natural gas and liquids they produced.

Represented a major oil & gas company in an investment arbitration against the Republic of Argentina. We obtained a favorable award on damages, which was significantly higher than the amount granted by other energy companies who brought similar claims in analogous proceedings.

Represented an owner in a construction dispute in Panama involving change orders and price adjustment claims; our client reached a very favorable settlement agreement.

Represented several major oil & gas companies in their investment cases against a Latin American State and obtained awards in the hundreds of millions of Dollars.

Representing an international airline in an investment arbitration claim against Venezuela involving a dispute over repatriation of proceeds from domestic ticket sales.

Representing Spanish investors in their arbitration case for the expropriation of an airline in Latin America.

Representing a U.S. energy company and its UK partner in an ICSID Additional Facility conciliation proceeding against Equatorial Guinea and involving a Production Sharing Contract.

Representing a U.S. energy company in obtaining an ICSID award against Argentina due to the abrogation of dollar tariffs and inflationary adjustments in the gas transportation sector.

Representing a Spanish company in its ICSID case against Venezuela for the expropriation of its assets in the country.

Representing a U.S. water company in a case arising from the termination of a 30-year concession.

Representing a Luxembourg energy company in its ICSID case for the abrogation of dollar tariffs and inflationary adjustments and other regulatory takings in the power sector.

Representing a German company in its arbitration case arising from the termination of a contract to create a system of migration control and personal identification.

Representing a Spanish telecommunications company in its ICSID case against a Latin American State for a series of regulatory measures

Representing a U.S. energy company in its arbitration claim against a Latin American State for imposing confiscatory provincial stamp taxes and abrogating dollar tariffs and automatic adjustments in the gas transportation sector;

Representing a U.S. energy company in an ICSID arbitration for the elimination of dollar tariffs and inflationary adjustments in the gas transportation sector

Representing a Dutch company in its arbitration case for the termination of a contract to create an informatics system and to provide Argentina with equipment for the control and administration of the radio-electric spectrum

Representing an Italian company in its arbitration case for the unlawful termination of a water and sewage concession contract

Representing a U.S. water and sewage company in its case against Argentina for measures taken against its investment

Representing an Italian company in a case for measures taken against investments in a highway concession

Credentials

J.D., University of Buenos Aires, Argentina

M.A., Queen Mary College, University of London, with merit

Buenos Aires Bar Association

Admitted to practice in Buenos Aires, Argentina.

ICDR Young & International

LCIA Young & International

Young ICCA

AIPN

French

German

Italian

Latin

Spanish