Oscar Collins

Oscar is an associate in the London office. He has experience in a number of significant investment treaty and commercial arbitrations conducted under a range of institutional rules, including ICC, LCIA, and ICSID. His experience spans a broad range of industry sectors, including oil and gas, construction, transport, and financial services. Oscar has acted on matters covering diverse geographic regions, including Central Asia, Eastern Europe, and the Middle East.

Prior to joining Three Crowns, Oscar trained at and practised in the international arbitration group of a leading international law firm, spending time in its London and Moscow offices.

Oscar is admitted in England & Wales. He holds a first-class honours degree in English from University College London, and completed his legal studies at the College of Law, BPP, and the University of London.

Oliver Spackman

Oliver is an associate in our London office.  He has advised clients in a range of industries, including oil and gas, telecommunications and manufacturing, in connection with disputes in the Middle East, Africa, Asia and Europe, under various institutional rules, including UNCITRAL, ICSID, ICC and LCIA.

His recent experience includes: (a) representing an international consortium of energy majors in ICC arbitration proceedings in Paris relating to operational and environmental claims arising out of the expiry of a PSC entered into with a Middle-Eastern State; (b) advising a State-owned oil company in connection with potential maritime boundary risks and investment treaty structuring options associated with proposed investments in the Caspian Sea and in Africa; and (c) representing a Middle Eastern telecoms operator in an UNCITRAL arbitration against a Middle Eastern state in a dispute involving discriminatory measures taken by the state in breach of its Investment Law.

Oliver is an English-qualified solicitor, and a Solicitor-Advocate (Higher Courts Civil) in England and Wales.  He has taught public international law courses at Sciences Po in Paris and King’s College, University of London, and holds first class honours degrees in Philosophy from the University of Sydney and Law from Queen Mary, University of London, and a Graduate Diploma in Law and Legal Practice from BPP Law School.

Leilah Bruton

Leilah is counsel in our London office.  She has extensive experience representing corporations on the resolution of complex disputes involving investment treaties and contractual relationships, with a particular focus on oil & gas disputes arising out of long-term production sharing agreements.

Her recent experience includes representing: an international consortium of energy majors in ICC arbitration proceedings in Paris relating to operational and environmental claims arising out of the expiry of a PSC entered into with a Middle-Eastern State; an energy major in ICC arbitration proceedings in Paris relating to cost recovery disputes and claims of environmental damage arising out of the early relinquishment of a PSC with a Middle-Eastern State; and an energy major in potential treaty and contract claims against an African government and state-owned oil company arising out of a purported unilateral and retroactive change in the profit sharing mechanism set out in the applicable PSCs.

Prior to joining Three Crowns Leilah was counsel in the international arbitration group of a major international law firm.

Leilah has been named a Who’s Who Legal: Future Leader for 2018-2021, a Rising Star in the 2021 Legal 500 UK, and a Rising Star in the 2019 Legal 500 International Arbitration Powerlist for the UK.  She was educated at the University of Cambridge, is qualified in England and Wales, and speaks English and French.

Ridhi Kabra

Ridhi is an associate in the London office.  Her experience includes advising companies in investment treaty and commercial arbitrations relating to taxation, oil and gas, and infrastructure.

Before joining Three Crowns Ridhi worked in the Paris office of a leading US law firm.

Ridhi holds a PhD from the University of Cambridge, and received her undergraduate degree in law from the National Academy of Legal Studies and Research (NALSAR), Hyderabad, India.  Ridhi has previously taught law at the University of Bristol, and held visiting positions at King’s College London (2017) and the Max Planck Institute Luxembourg for International, European and Regulatory Procedural Law (2018).  She is qualified in India and speaks English, Hindi and Bengali.

Clara Florin

Clara is an associate based in the London office. She has experience of commercial and investment-treaty arbitrations, advising private corporations, States and State-owned entities under major institutional rules. Her practice covers a wide range of sectors, including oil and gas, renewables, infrastructure and the media industry. Clara also has litigation experience before French and international courts.

Clara trained in the international arbitration group of a leading international firm based in London. Prior to this, she trained at a French litigation firm and was also a member of Laurent Gbagbo’s defence team before the International Criminal Court.

Clara holds two Master’s degrees from Paris II Pantheon-Assas and an LL.M. from King’s College London, where she focused on international dispute resolution. She is admitted to practice in France.

Ahmed El Far

Ahmed is an Egyptian qualified lawyer based in the London office.

He has represented companies, States and State-owned entities in investment treaty and commercial arbitrations under the rules of the ICC, ICSID, UNCITRAL and CRCICA, with a particular focus on disputes in the energy and construction sectors.

Prior to joining Three Crowns, Ahmed practiced at a leading international firm in Paris. He is the Associate Editor of the International Journal of Arbitration, Mediation and Dispute Management, published by the Chartered Institute of Arbitrators.

Ahmed holds a PhD degree from Queen Mary University of London, an LL.M from New York University, and obtained his LL.B from Cairo University.

Ruimin Gao

Ruimin is an associate based in our London office.  She has experience advising and representing corporations, States and State-owned entities in commercial and investment treaty arbitrations under a number of major arbitration rules.  Her experience includes acting in complex, high-value disputes in a broad range of sectors including in construction, mining and resources, energy, real estate and transport.

Prior to joining Three Crowns, Ruimin was a senior associate in the litigation and dispute resolution group of an international law firm in its Sydney and Beijing offices.  She has also worked as a government lawyer in the Commonwealth Attorney-General’s Department of Australia and was previously an adviser to the Prime Minister of Australia.

Ruimin holds a Master of Laws in international law from the Australian National University, as well as a Bachelor of Laws with honours from The University of Queensland.  She speaks English and Chinese (Mandarin).

Farouk El-Hosseny

Farouk, a senior associate in our London office, advises clients on arbitrations governed by the ICC, ICSID, and UNCITRAL rules, with a focus on complex commercial and investor-State disputes in the telecommunications and oil and gas sectors. He is often called upon by clients to provide strategic advice in respect to disputes raising matters of taxation, international sanctions, and claims by competing governments.

In addition, Farouk has acted as arbitrator under the ICC and DIAC rules. He is actively involved in the Firm’s pro bono practice, having recently assisted REDRESS in a landmark case before the African Commission on Human and Peoples’ Rights (ACHPR).

Prior to joining Three Crowns, Farouk was an international arbitration associate in the London office of a leading global firm, working as well in Riyadh and Dubai as a member of the firm’s Corporate and M&A teams. While in London, he was part of the firm’s Global Business and Human Rights and Global Sanctions Teams. Farouk was previously a legal counsel at the Permanent Court of Arbitration in The Hague, where he administered appointing authority requests, investor-State, and commercial arbitrations. He was also the Court’s acting representative in Mauritius, where he focused on promoting the Court’s activities and casework in Africa. In addition, Farouk has litigation experience before Quebec courts.

Farouk holds a PhD degree in public international law from Leiden University and was a visiting scholar at the Lauterpacht Centre for International Law at the University of Cambridge. He obtained a bachelor’s degree in civil law from the University of Ottawa and an LLM from the University of Montreal.

Farouk is a native Arabic and French speaker, also speaking Spanish and Italian fluently. He is a member of the Quebec and Paris Bars.

YiKang Zhang

YiKang is an associate in the London office of Three Crowns.

YiKang has experience in both international commercial and investment treaty disputes across a range of sectors including energy, construction and financial services.  He has also been involved in proceedings under different institutional rules, including the ICC, LCIA and UNCITRAL rules.

YiKang previously worked in the New York and Beijing offices of a leading international law firm.  He has also interned with Judge Ronnie Abrams on the United States District Court for the Southern District of New York, and assisted with the representation of low-income individuals in the Bronx at The Bronx Defenders.  His work on the termination of intra-EU BITs been published in the American Review of International Arbitration.

YiKang obtained his J.D. from Columbia Law School.  He also holds an LL.B with First Class Honours from King’s College London, where he finished top of his class in consecutive years.

Nathaniel Burnett

Nathaniel is an associate in the London office. He has experience acting in international commercial and investment treaty arbitrations conducted under institutional and ad hoc arbitration rules, particularly regarding disputes in the construction and insurance sectors.  He has also represented clients in high value and complex commercial litigation.

His recent experience includes: representing a Middle Eastern state in defending an ICSID investment treaty arbitration claim from a contractor for denial of justice and breach of the effective means standard; representing a Jordanian construction company in obtaining an anti-suit injunction restraining domestic court proceedings brought against it in breach of an arbitration agreement; and representing a pharmaceutical manufacturer in an ad hoc commercial arbitration claim it brought against its insurer for withholding proceeds due under a Bermuda Form insurance policy.

Prior to joining Three Crowns was based at another international law firm, where he trained, in their London and Paris offices.  Nathaniel read Politics, Philosophy and Economics at Warwick University.

Jeff Yiu

Jeff is an associate in the London office.

He has represented governments, state-owned enterprises and multinational corporations in investment treaty and commercial arbitration under all major arbitral rules, with particular experience in the financial services, oil and gas, and consumer product sectors.

Prior to joining Three Crowns, Jeff practised in a leading international law firm in its Hong Kong and London offices, where he acted on a broad range of cross-border disputes.  Jeff also has experience in commercial litigation, having represented clients in high value and complex disputes in the English and Hong Kong courts.

Jeff obtained his Bachelor of Laws degree from King’s College London and his Postgraduate Certificate in Laws from the University of Hong Kong.  He is qualified in England & Wales and Hong Kong.

Reza Mohtashami QC

Reza Mohtashami QC is a partner in the London office. He has represented clients as counsel and advocate in more than 85 arbitrations conducted under a variety of arbitration rules in many different jurisdictions. Reza has particular expertise in disputes arising in emerging markets with a focus on the telecoms, energy, and infrastructure sectors.

His recent experience includes securing a $1.98 billion award on behalf of Crescent Petroleum and Dana gas in an LCIA arbitration brought against the Kurdistan Regional Government, and securing a successful settlement on behalf of Beijing Urban Construction in an ICSID arbitration against the Republic of Yemen following a landmark decision on jurisdiction.

Prior to Three Crowns, he worked in the arbitration practice of a leading international arbitration firm where he established and led the firm’s global arbitration practice in the Middle East.

Reza is a Vice-Chair of the IBA Arbitration Committee, a trustee of the DIFC-LCIA Arbitration Centre, a trustee of the Bahrain Chamber of Dispute Resolution, a member of the LCIA Court, and an editorial board member of the ICC Dispute Resolution Bulletin and Global Arbitration Review. He has published extensively and is a regular speaker at international arbitration conferences.  He is the author of A Guide to the LCIA Arbitration Rules, the leading commentary on the 1998 LCIA Rules (published by Oxford University Press).

Reza is a qualified English solicitor-advocate and was appointed Queen’s Counsel in recognition of his advocacy skills in 2018.  He is recognised as a Thought Leader in arbitration by Who Who’s Legal and Chambers describes him as giving “clear and authoritative advice on matters of strategy and case development,” with a source “praising him as ‘a fantastic lawyer’.” He speaks English, French, and Farsi.

Vanessa Moracchini

Vanessa is an associate in the London office of Three Crowns.

Vanessa’s experience extends to both international commercial and investment treaty disputes, including in the renewable energy, electrical power, petroleum, and banking industries.  She has acted in arbitrations heard under a range of arbitration rules, including the ICC, ICSID and UNCITRAL rules.

Her recent experience includes representing an electricity utility company in an investment treaty arbitration against a Latin American State, arising from the Government’s decision to seize and liquidate a local power company.  She has also acted for a consortium of major oil & gas companies in a dispute with a Latin American State concerning various breaches of an investment agreement.

Prior to joining Three Crowns, Vanessa trained in the international dispute resolution practices of two leading international firms based in Paris.  In addition, she interned at the United Nations Office of Legal Affairs Treaty Section in New York City and at the Inter-American Court of Human Rights in San José.

Vanessa received her master’s and bachelor’s degrees from Sciences Po in Paris, where she focused on international dispute resolution.  During her studies, Vanessa undertook academic exchanges at Columbia Law School and the Law Faculty of the University of São Paulo.

Richard Trinick

Richard, a senior associate in our London office, has acted on many large and complex arbitrations across a variety of sectors and regions, with a particular focus on energy, power, and technology disputes. In addition, he has acted on a number of expert determinations, often in combination with parallel arbitral proceedings. Recently, Richard was appointed as sole arbitrator in a financial services dispute under ICC Rules.

Prior to joining Three Crowns, Richard was an associate at a leading international arbitration practice in London, where he represented clients in commercial arbitrations under various institutional rules and across a range of industry sectors, including energy, shipping, and automotive. He also was a member of the M&A team at the second-largest brewing company in the world, SABMiller.

Richard is an English-qualified solicitor-advocate (Higher Courts Civil) and holds a degree in Jurisprudence from Oxford University.

Elizabeth Chan

Elizabeth specialises in international commercial and international investment treaty arbitration. She has represented both investors and States across various jurisdictions including London, New York, Hong Kong, and The Hague.

Elizabeth is a Solicitor-Advocate in England and Wales, and is admitted in New York and New Zealand. She speaks English, Cantonese, and Mandarin.

She holds roles in several organisations focused on gender diversity, thought leadership in dispute resolution and prevention, and Asia, including:

  • Member of the Equal Representation in Arbitration Pledge’s Young Practitioners’ Subcommittee
  • Secretary of the International Institute for Conflict and Prevention and Resolution’s (CPR) European Advisory Board
  • Member of the CPR’s Young Attorneys in Dispute Resolution Steering Committee
  • Committee Member of the Asia-Pacific Forum on International Arbitration

Elizabeth teaches seminars and tutorials in the LLM programmes at LSE and Queen Mary University of London. She previously taught at the University of Auckland and Victoria University of Wellington.

Elizabeth obtained her LLM from Yale Law School as a Fulbright Scholar and received a BA/LLB(Hons) from the University of Auckland. She was a member of the Allard K. Lowenstein International Human Rights Clinic and an editor of the Yale Journal of International Law.

Elizabeth previously clerked at the Supreme Court of New Zealand.

Katherine Jonckheere

Katherine, an associate in the London office, specialises in international commercial arbitration and investor-State disputes.  She has experience working on high-value and complex arbitrations governed by a variety of arbitration rules and across several industries, including the energy sector.

Prior to joining Three Crowns, Katherine was a legal counsel at the Singapore International Arbitration Centre where she handled the administration of over 100 international commercial arbitrations, including emergency arbitrations.  She further has three years of prior commercial litigation experience before the Belgian courts.

Katherine’s recent experience includes representing various leading oil & gas companies in disputes against several States in the CIS region, the Middle East, Asia, and Africa, relating to matters such as tax, production sharing, and cost recovery.  She was also part of the team that successfully defended clients against multi-billion dollar counterclaims from the Kurdistan Regional Government of Iraq.

Geoff Watt

Geoff has experience acting in international commercial and investment treaty arbitrations conducted under institutional and ad hoc arbitration rules, involving disputes across a range of sectors including energy, oil & gas, and mining.

Prior to joining Three Crowns, Geoff practised in the litigation and dispute resolution group of a leading Canadian firm in Toronto.

His recent experience includes:

  • Acting for a consortium of oil majors in a dispute with a West African State-owned oil company concerning cost recovery and breaches of a PSC.
  • Acting for a Panamanian gold exploration and mine development company in an UNCITRAL investment treaty arbitration against Spain, arising from the termination of concession rights.
  • Acting for a consortium of oil majors in an ICC arbitration with a Middle Eastern State concerning claims under a PSC.

Penny Martin

Penny, counsel in our London office, has expertise in international commercial and investment treaty arbitration, public international law, and international human rights law. Her primary focus has been on energy-related disputes, including disputes relating to long-term oil and gas agreements (including environmental, abandonment and decommissioning, and cost recovery issues), renewable energy, gas pricing, licensing, and intellectual property.

Prior to joining Three Crowns, Penny was a senior associate in an international arbitration practice of a leading international law firm in London.

Penny also has a background in academia and co-authored the leading text on the appointment of international judges entitled Selecting International Judges: Principle, Process, and Politics (Oxford University Press, 2010), which examined the process for appointing judges to the International Court of Justice, International Criminal Court, and other international courts and tribunals. She also conducted the 2010 International Arbitration Survey at the School of International Arbitration of Queen Mary, University of London, which focused on the choice of governing law, seat, and arbitration rules, and involved interviews with some of the leading users of arbitration worldwide.

Penny was named a “Rising Star” in International Arbitration in the 2021 Legal 500 UK, after being recognised as “Highly Regarded” in the previous year’s guide. She was educated at Monash University and the University of Glasgow. Penny is qualified in England and Wales and in Victoria, Australia.

Maanas Jain

Maanas, an English-qualified barrister and senior associate in our London office, has advised, represented, and conducted advocacy for corporations in complex, high-value commercial and investment treaty arbitrations in a broad range of sectors (including energy, finance, technology, and infrastructure) under all major arbitration rules. He also has extensive experience handling disputes involving States or State entities, as well as cases with an Indian connection.

His recent experience includes:

  • Successfully representing several infrastructure funds in an ICSID arbitration against Spain arising from State measures adversely affecting renewable investments
  • Acting for a global financial institution in an LCIA arbitration arising from a Middle East joint venture dispute
  • Representing an oil major in an ad-hoc treaty arbitration with a Southeast Asia State concerning adverse tax measures
  • Successfully representing a leading Korean distributor against its upstream supplier in a multimillion-dollar ICC arbitration

Maanas also advises and represents parties in arbitration-related court matters. Most recently, he appeared as counsel in the UK Supreme Court on behalf of the ICC in Halliburton v Chubb, which is the leading English authority on apparent bias in circumstances of multiple arbitral appointments in related cases.

Maanas is a visiting lecturer at Middlesex University and speaks regularly on arbitration. His recent publications have appeared in the European International Arbitration Review and Practical Law. He is a member of the ICSID Review’s Peer Review Board.

Maanas was educated at Oxford University and City Law School and was awarded a number of academic scholarships during his training.

Jonathan Fernandes

Jonathan, a senior associate based in our London office, has extensive experience acting as counsel in complex, high-value international commercial and investment treaty arbitrations conducted under the leading institutional and ad hoc arbitration rules, including ICC, LCIA, UNCITRAL, ICSID, and CPR.

His experience spans a broad range of industries, including oil and gas, construction, renewable energy, telecommunications, insurance, finance, mining, and pharmaceutical.

Prior to Three Crowns, Jonathan practised in the International Arbitration group of a leading international firm. He has published pieces on topics of international interest, such as sovereign immunity and arbitration on the African continent.

Manish Aggarwal

Manish, a partner in the London office, is a dual-qualified English solicitor and Indian advocate. He has extensive experience representing and conducting advocacy for corporations and States in commercial and investment treaty arbitrations in a broad range of sectors (including energy, infrastructure, pharmaceuticals, telecommunications, and technology) under all major arbitration rules. Manish is recognised by Who’s Who Legal as a “Future Leader” in Arbitration and in Legal 500 UK as a “Next Generation Partner” in both the International Arbitration and Public International Law sections.

His recent experience includes:

  • Representing ConocoPhillips in its successful ICSID arbitration against Venezuela arising from the expropriation of its oil and gas assets, securing a historic US$8 billion award
  • Representing an oil and gas company in a joint venture dispute pertaining to a production sharing contract regarding a field in Central Asia, securing dismissal of all claims worth half a billion dollars
  • Representing three oil and gas companies in an LCIA arbitration against a regional government in the Middle East, securing awards worth approximately US$2 billion and dismissal of counterclaims worth several billion dollars, which facilitated a favourable settlement
  • Representing an Indian corporation in a high-value and complex ICC arbitration arising from a real estate joint venture
  • Representing infrastructure funds in multimillion-dollar ICSID arbitrations against Spain under the Energy Charter Treaty arising from measures adversely affecting renewables

He also has experience as an arbitrator, recently serving as a sole arbitrator in a Singapore-seated SIAC arbitration and a party-appointed arbitrator in a London-seated ICC arbitration.

Manish served as a member of the IBA Subcommittee on Investment Treaty Arbitration (2014-2016), and is presently serving on the Steering Committee of the Young Group for the Mumbai Centre for International Arbitration. He taught International and Comparative Arbitration at Queen Mary University’s School of International Arbitration and International Investment Law at King’s College School of Law (Master of Laws program).

Manish studied law and humanities at National Academy of Legal Studies and Research (NALSAR) University of Law in India (including a semester at University of New South Wales in Australia), and holds a post-graduate diploma in international arbitration (with distinction) from Queen Mary University of London.

Gaëtan Verhoosel

Gaëtan has served as advocate and as arbitrator in a large number of both commercial and investment treaty arbitrations, some of which have been widely reported because of the significance of the financial recoveries at stake or the novelty of the legal issues involved.

Gaëtan is the immediate past Co-Chair of the IBA Arbitration Committee and was appointed to the ICSID Panel of Arbitrators by the Kingdom of Belgium.  He teaches international investment law at King’s College School of Law in London.

Prior to co-founding Three Crowns, Gaëtan was a partner and the global co-chair of the international arbitration practice at a prominent international law firm.  Prior to entering private practice, he served as a Legal Advisor at the World Trade Organization in Geneva, where he advised dispute settlement panels adjudicating disputes between sovereigns across a range of industry sectors.

Gaëtan has been ranked as a leading international arbitration practitioner in all major publications, including Chambers, The Legal 500, the Arbitration Powerlist 2019, and Who’s Who Legal.  Gaëtan has been described in Chambers as “terrific” and is praised for “articulating his arguments well and being good at devising the right legal strategy while also convincing the tribunal during his submissions.” Who’s Who Legal has noted that Gaëtan is recognised by his clients, peers, and opponents as “the number-one person I have ever encountered on the other side,” “impressive in every aspect,” and that “ he is liked by peers for his style and presence; he definitely deserves to be on any list of the best.”

Constantine Partasides QC

Constantine Partasides QC has appeared as counsel in some of the largest international arbitrations of the last two decades.  In the commercial space, Constantine has been lead counsel in claims against sovereigns and State entities in Venezuela, Algeria, Nigeria, the Kurdistan Region of Iraq and Kazakhstan.  He has recently led teams that obtained a monetary award for clients against the Kurdistan Regional Government for $1.98bn, a final award for a consortium of clients against the Nigerian National Petroleum Company in excess of $2bn, and a final award for ConocoPhillips against PDVSA in excess of $2bn.

Constantine has also advised and represented a variety of investors and States in relation to disputes under relevant bilateral and multilateral investment treaties. He served as counsel of record in high-profile ICSID successes for ConocoPhillips in its historic victory against the Bolivarian Republic of Venezuela, the Republic of Kenya in World Duty Free v. Republic of Kenya and the Republic of Lithuania in Parkerings v. Republic of Lithuania.  Constantine is leading a team for Elliott Associates in an arbitration under the US-Korea Free Trade Agreement against the Republic of Korea.

Constantine has been named a “Global Elite Thought Leader” by Who’s Who Legal, which describes him as “‘one of the best practitioners in the market,” “exquisite as an advocate,” and “a leader of his generation.” Chambers recognises him as a “Star Individual” in international arbitration, with a market source saying he is “seen as one of the go-to people in the world for a party who is involved in a large and complex arbitration.” He is also listed in the “Hall of Fame” for international arbitration in The Legal 500.

He is a co-author of the fourth, fifth and sixth editions of the leading textbook on international arbitration Redfern and Hunter on International Arbitration.  He is a solicitor-advocate (Higher Courts Civil) and was appointed Queen’s Counsel in 2014. Constantine was educated at King’s College, London, and Cambridge University.

Carmen Martinez Lopez

Carmen is a partner in the London office of Three Crowns. She has appeared as advocate in numerous investment treaty and commercial arbitrations, both under the rules of the major arbitral institutions and ad hoc, and involving a variety of jurisdictions, with a particular focus on Latin America and Spain.

Her most recent experience includes the representation of an energy company in an investment dispute against the Republic of Colombia, a consortium of oil & gas companies in a tax stabilization dispute against a Latin American State, an energy company in a shareholders’ dispute relating to a joint venture gas marketing company, a mining junior in its investment dispute against the Kingdom of Spain, and a private equity investor in its investment dispute against the Kingdom of Spain.

Carmen is recognised in all major publications, with sources describing her as “one of the most impressive legal minds I have encountered”, a “truly gifted practitioner”, who “understands problems very well in a global way.”

Carmen is dual-qualified in civil law and common law, and regularly handles contentious work in English, Spanish, and French. She is admitted to the New York and Madrid Bar, in addition to being a Solicitor of the Senior Courts of England and Wales. Carmen holds law degrees from Columbia Law School, the College of Europe and the University of Murcia (Premio Nacional Fin de Carrera and Premio Extraordinario Fin de Carrera).

She is the President of the British Chapter of the Spanish Arbitration Club (Club Español del Arbitraje), and a member of the Arbitrator Appointment Committee of the Madrid Arbitration Court.