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a Senior Adviser in the Tax Treaties and International Co-operation Unit at the OECD Centre for Tax Policy and Administration (CTP), where he has worked since 2008

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At the OECD, Mr. Barret works on tax treaty issues as part of the Secretariat for Working Party No. 1, the OECD body responsible for the development of the OECD Model Tax Convention on Income and on Capital. Before joining the OECD, Edward worked for almost ten years at the Office of the Associate Chief Counsel (International) of the United States Internal Revenue Service (IRS), where he advised the U.S. competent authority and IRS personnel on the interpretation and application of U.S. income tax treaties and assisted the U.S. Treasury in the negotiation of U.S. income tax treaties. Edward has a J.D. from Stanford Law School and was admitted to the California Bar in 1995. He also has an A.B. (International Relations/Economics) from Brown University. 

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an Adviser at the OECD Centre for Tax Policy and Administration (CTP), where he has been working since 2018

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He currently is part of the team that manages the CTP’s Global Relations Programme in Taxation, with a focus on capacity building and international cooperation. Before joining the OECD, Néstor worked for over a decade at the Chilean tax authority (Servicio de Impuestos Internos – SII), where he was part of the technical team responsible for negotiating tax treaties and representing Chile in various OECD working groups on international tax matters. He began his professional career as an associate lawyer at Carey, one of Chile’s leading law firms. Néstor holds a law degree from the University of Chile (2005), was admitted to the Chilean Bar in 2006, and earned an LL.M. in International Taxation from New York University in 2012.

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an advisor in the Tax Treaties and International Co-operation Unit of the OECD Centre for Tax Policy and Administration

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Before joining the OECD, Mr. Van Brussel worked for in private practice and as an inhouse tax manager. His work at the OECD currently focuses on the development of the Two-Pillar Solution to address the tax challenges arising from the digitalisation of the economy and several other topics. Yves holds an LLM in international taxation from the WU Vienna.

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is a Tax Treaty Specialist in the Australian Tax Office (ATO) Treaties Consultation Unit, where she has been working since 2021

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She is currently part of the team that provides administrative and legal insights to the Australian Treasury during the negotiation of Australia’s tax treaties. She also provides risk advice and guidance to ATO stakeholders on practical treaty issues. She holds an undergraduate law degree with honours (Western Sydney University) and a master’s degree in law, specialising in Corporation, Commercial and Taxation (University of New South Wales).

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has been Senior Policy Advisor and Tax Treaty Negotiator in HM Revenue and Customs since 2022.  

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His team has policy and technical responsibility for the UK’s network of over 130 Double Tax Agreements, as well as the taxation aspects of Free Trade Agreements and the interaction with multilateral organisations.  He is the joint HMRC policy lead for tax matters at the United Nations and is a UK Government Observer to the UN Committee of Experts, as well as being the UK policy owner for cross border debt assistance.  He has extensive prior experience in multinational enterprise compliance, primarily in the insurance sector.  He holds an undergraduate degree in Professional Studies in Taxation (Manchester Metropolitan University) and an Advanced Diploma in International Tax (Chartered Institute of Taxation).

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is an Assistant Deputy General Director for International Taxation at the Spanish Ministry of Finance.

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Previously, he was an Area Coordinator at the same Department, Corporate Tax Rapporteur at the Central Economic-Administrative Court, and Head of an Audit Team at the Spanish Tax Agency. He participates in the Spanish delegations to the OECD Working Party 1, the OECD/G20 Inclusive Framework Task Force on the Digital Economy, and the Council of the European Union Working Party on Tax Questions on Direct Taxation. He holds a Law degree from the University of Oviedo and belongs the Spanish Corps of Tax Inspectors.