Who's Who in PISA


The OECD Secretariat has overall managerial responsibility for the programme, monitors its implementation on a day-to-day basis, acts as the secretariat for the PISA Governing Board, builds consensus among countries and serves as the interlocutor between the PISA Governing Board and the international consortium charged with the implementation of the activities.


General contact information

Postal address:
2 rue André Pascal
75775 Paris Cedex 16

E-mail address:



If you are interested in applying for an internship with the Secretariat please make sure that you are able to meet the following requirements then send a message to together with your CV.

The PISA team

Andreas Schleicher
Director, Directorate for Education and Skills

Andreas Schleicher is Director for Education and Skills, and Special Advisor on Education Policy to the Secretary-General at the Organisation for Economic Co-operation and Development (OECD) in Paris.

As a key member of the OECD Senior Management team, Mr. Schleicher supports the Secretary-General’s strategy to produce analysis and policy advice that advances economic growth and social progress. He promotes the work of the Directorate for Education and Skills on a global stage and fosters co-operation both within and outside the OECD. In addition to policy and country reviews, the work of the Directorate includes the Programme for International Student Assessment (PISA), the OECD Survey of Adult Skills (PIAAC), the OECD Teaching and Learning International Survey (TALIS), and the development and analysis of benchmarks on the performance of education systems (INES).

Before joining the OECD, Mr. Schleicher was Director for Analysis at the International Association for Educational Achievement (IEA). He studied Physics in Germany and received a degree in Mathematics and Statistics in Australia. He is the recipient of numerous honours and awards, including the “Theodor Heuss” prize, awarded in the name of the first president of the Federal Republic of Germany for “exemplary democratic engagement”. He holds an honorary Professorship at the University of Heidelberg.

A German citizen, Andreas is married, with three children. He speaks German, English, Italian and French.

Tel.: +(33) 1 45 24 1897


Yuri Belfali
Head of Division

Ms. Belfali supports the Directorate for Education and Skills in providing strategic direction to the work on knowledge generation and its policy implication concerning skills development in early childhood education, care and school systems.  She oversees large scale surveys including the Programme for International Student Assessment (PISA), Teaching and Learning International Survey programme (TALIS) and thematic analyses including the development of learning framework ‘the future of education and skills: OECD education 2030’. These programmes are key components of the OECD’s work to help countries promote learning opportunities for all, which promotes economic growth and social progress.

Ms. Belfali spent the last 20 years in France, the US, and in several countries of South East Asia, Africa and Middle East and North Africa regions.  Before joining the OECD, she worked for UNICEF as Chief of the Education Section in Morocco and the World Bank in the field of human development between 2002 and 2012.   She had a leadership role in advising governments for education reforms and gender mainstreaming. Ms. Belfali, a Japanese national, holds a Master’s degree in International Educational Administration and Policy Analysis from Stanford University.


Catalina Covacevich

Catalina joined the OECD in 2016 as a policy analyst to support the implementation of the PISA for Development initiative.  She is currently also working on the development of the PISA 2024 optional Foreign Language assessment as well as supporting the design and implementation of PISA.  Before joining the OECD she worked for the Inter-American Development Bank as a local Education Specialist, for the Assessment Unit of the Chilean Ministry of Education, and for MIDE UC, a Chilean institute specialised in large scale educational assessments, where she participated in the design and implementation of national and regional assessments. Catalina holds a MSc in Social Psychology from the London School of Economics and Political Science and speaks English, Spanish, and rudimentary French.


Alfonso Echazarra

Alfonso Echazarra joined the OECD in 2013 and the PISA team in September 2014. Prior to joining the OECD, he worked as a research associate at the Carlos III–Juan March Institute in a project on welfare regimes and immigration and at the IESE Business School in a project on healthcare innovation.  Alfonso holds a PhD in Social Statistics from the University of Manchester. In 2012, he was awarded the "la Caixa" Prize in Social Sciences for his book Neighbourhood Crime: Perceptions and Reactions. Other than in education inequalities, he is interested in deviant behaviour, public opinion, residential segregation and social capital. Alfonso is originally from Madrid and speaks Spanish, English, French and some German and Italian.


Juliet Evans
Communications Co-ordinator

Juliet has been working for PISA since 1999. She's works with PISA's senior analyst on communications, focusing on strategy, online dissemination and public relations. Prior to her current position she worked with PISA's project managers on the implementation of PISA, specifically on budget management, procurement and outreach. Juliet came to Paris and to the OECD in 1996, where she initially worked for the Director of the former Directorate for Education, Employment, Labour and Social Affairs. She then worked on the OECD’s International Adult Literacy Survey and Early Childhood Education and Care project before joining PISA. Juliet is British and has a degree in French Studies from the University of Nottingham in the UK. Juliet speaks English, French and some German and Spanish.


Natalie Foster

Natalie joined the OECD in January 2017, starting as an intern in the OECD Development Centre. After a brief spell at the European Commission, she re-joined the OECD in November 2017 to work on the research and development of the PISA innovative domain assessments. She holds a BA in French and Spanish from the University of Nottingham, and completed her MA in European Studies (Politics, Policy and Society) at the University of Bath, Charles University (Prague) and Sciences Po Paris. Natalie is British, and speaks English, French and Spanish.


Tue Halgreen
Senior Project Manager

Tue manages the development and implementation of PISA. He joined the OECD and the PISA team in 2012. Before joining the OECD he was a Senior Advisor on assessment and evaluation policy in the Danish Ministry of Education. Tue holds master's degrees from the universities of Lancaster and Copenhagen. He speaks English, French and Danish. 


Miyako Ikeda
Senior Analyst

Miyako is in charge of PISA data analysis. She joined PISA in May 2004 and has a masters degree in the sociology of education from the University of Tokyo and a doctoral degree in education from Teachers College, Columbia University. From 2000 to 2002, Miyako was with the World Bank in Vietnam, where she conducted a national study on the quality of primary education. From 2002 to 2004, she was with the International Institute for Educational Planning (UNESCO) as an Associate Expert and worked for a project of the Southern and Eastern African Consortium for Monitoring Educational Quality (SACMEQ). Miyako speaks Japanese and English and is studying French.


Emma Linsenmayer

Emma joined the OECD in September 2018 as an intern on the Strength through Diversity project. After finishing her master’s degree in International Relations and Diplomacy from the American Graduate School in Paris and interning at the U.S. Mission to the European Union, she re-joined the OECD to support the research and development of the PISA innovative domains assessments in November 2019. Emma’s prior experience includes teaching ESL for a China-based education technology company and supporting the protection of migrant children’s rights for a Paris-based NGO. She holds a BA in Psychology, English Literature and Law, Societies and Justice from the University of Washington, Seattle and speaks English and French.


Thomas Marwood
Project Support Co-ordinator

Thomas joined the PISA team in February 2017 to support the implementation of the PISA programme. Before joining the OECD, Thomas worked for the UK’s Foreign and Commonwealth Office. Thomas is British, holds a degree in French Studies from the University of London Institute in Paris and speaks English and French.


Tarek Mostafa

Before joining the OECD, Tarek was a Senior Research Associate at the University College London, Institute of Education. His research spanned the analyses of educational inequalities, the assessment of educational performances and policy, and quantitative and survey methods. Tarek worked extensively on PISA and similar large scale surveys, and on longitudinal surveys during his PhD and subsequent research. He holds a PhD in Economics from the University of Aix Marseille (France) and an MA in Political Economy from the Saint Joseph University (Lebanon). He is a fellow of the Higher Education Academy in the UK and an Honorary Senior Lecturer at the UCL Department of Social Science. Tarek is British and speaks English, French and Arabic.


Mario Piacentini
Senior Analyst

Mario leads the work on the PISA assessments of transversal, 21st century skills. He is the lead author of the frameworks for the PISA 2018 assessment of Global Competence and for the PISA 2021 assessment of Creative Thinking. He also authored several PISA analytical reports, including the first report on the well-being of students. Mario joined the OECD in 2009 as a Young Professional. Before moving to the PISA team in April 2015, he worked for the Public Governance Directorate and the Statistics Directorate of the OECD, the University of Geneva and the World Bank. Mario has contributed to several large OECD and inter-agency projects on gender and well-being, and led the definition and development of international indicators on metropolitan areas, inequality, entrepreneurship and trade. He holds a PhD in economics from the University of Geneva. Mario speaks Italian, English, French and is currently learning Spanish.


Giannina Rech 

Giannina is mainly in charge of the analytical, statistical and editorial support of the PISA Reports. She also contributes to support the implementation of the PISA programme, particularly in country oversight and support. Giannina joined the OECD in 2011 as an intern for the Education at a Glance team. She then joined the PISA team as a statistician. Giannina holds a master’s degree in Coopération Internationale en Education et Formation from the university of Paris 5-Descartes. She speaks French, Spanish and English.


Daniel Salinas 

Daniel joined the PISA team as a policy analyst in September 2014 and is currently working on the PISA Thematic Reports series. He holds a PhD from The Pennsylvania State University, with a dual-title in Educational Theory & Policy and Comparative International Education. He also holds a Bachelor’s degree in Sociology and a Master’s in Literature from the Pontificia Universidad Católica de Chile. Prior to coming to PISA, Daniel was a visiting scholar in the Population Research Centre at the University of Texas at Austin and a recipient of the Fulbright fellowship. Daniel is originally from Chile and speaks English and Spanish.


Hanna Varkki
Project Support Co-ordinator

Hanna joined the PISA team in March 2017 to support the implementation of the PISA program. Before the OECD she worked in the Permanent Delegation of Estonia to the OECD and UNESCO. She holds a degree in Musicology from the University Paris-Sorbonne/Paris IV. Hanna speaks Estonian, English and French.


Sophie Vayssettes
Project Manager

Sophie has been working for PISA since 2003. She is currently in charge of the management of PISA with the National Centres and with the contractors. Prior to that Sophie worked on PISA as an analyst (2011-2014) and as a statistician (2003-2010). She has been with the OECD since 1991 and before PISA worked in the former Directorate for Education, Employment, Labour and Social Affairs and in the Directorate for Science and Technology. Her undergraduate and graduate degrees are in econometrics and statistics, Université Paris II Panthéon-Assas and Université Paris-Dauphine. Sophie is French and speaks French and English.


Megan Welsh

Megan is an associate professor at the University of California, Davis who is working on the PISA Innovative Domain during her sabbatical year. Her responsibilities involve conducting analyses with PISA data, contributing to the development of the PISA Research and Innovation strategy, and development of the 2024 Innovative Domain assessment.  Megan holds a BA from Wellesley College, a master’s in public policy from the University of California, Berkeley, and a PhD in educational psychology with an emphasis in measurement in research methods from the University of Arizona. She has worked as a professor of educational measurement for two universities, and has also worked as a school district assessment director, an educational policy researcher, and a 3rd and 4th grade bilingual Cantonese teacher.




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