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.


Francesco Avvisati

Francesco joined the OECD in 2010 and the PISA team in 2013 to work on the analysis of the PISA 2012 assessment of problem solving skills. Before that he worked in the Directorate for Education and Skills on the CERI Innovation Strategy for Education and Training project. Prior to joining the OECD, Francesco was a researcher and lecturer at the Paris School of Economics, at the French Ministry of Labour, and has been a member of the “Abdul Latif Jameel Poverty Action Lab - Europe”. Francesco Avvisati holds a PhD in Economics from the Paris School of Economics – his doctoral research focused on the benefits of parental involvement programmes for school achievement and behaviour of middle school students - and is an alumnus of the Scuola Superiore Sant’Anna (Pisa, Italy) and of the Ecole Normale Supérieure in Paris. Francesco speaks Italian, French, English and German.


Guillaume Bousquet

A French National, Guillaume joined the OECD in the Economic Directorate in July 2011. He first worked in the Long-Term Model for the Macroeconomic Analysis Division where he helped in designing, coding and upgrading the main model. He then moved to the Country Study Branch to join the team working on Colombia’s 2015 accession survey and Greece’s 2016 survey. He joined TALIS in May 2016 and PISA in September 2016. Before joining the OECD, he worked at the National Institute of Standards and Technology (NIST) in the USA, focusing on mathematical models for IT networks. He holds a Master in Applied Mathematics and IT Engineering from ISIMA (French engineering school) and speaks French and English.


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.


Pauline Givord

Pauline Givord joined the OECD and the Pisa Team in May 2018. Prior to joining OECD, she worked at Insee where she was head of a unit dedicated to quantitative methods for the evaluation of public policies and the use of innovative statistical methods and data for social and economic analysis. Pauline had also held various positions at Insee, including head of an economists unit,  project manager of the French Labor Force Survey and researcher at the Center for Research in Economics and STatistics (CREST). Pauline has extensive expertise in the quantitative methods for causal analysis and is interested specifically in issues related to equity in education, segregation and school evaluations. Pauline is a French national and holds a PhD in Economics from Sciences Po Paris. She also graduated from the French Ecole Polytechnique and Ecole Nationale de la Statistique et de l’Administration Economique. Pauline speaks French, English and some Spanish and Russian. 


Hélène Guillou
Research Assistant

Hélène joined the OECD in 2015. She started as an intern for the PISA for Development project before joining the PISA analysis team. Prior to working at the OECD, Hélène was completing a master’s degree in international economics and development from Université Paris Dauphine. She speaks French and English.


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.


Natalie Laechelt 
Project Co-ordinator

Since November 2018, Natalie is in charge of coordinating the PISA project as well as supporting the Creative Thinking assessment development. Prior to this she held the role of Purchasing Officer for Communication and Publication with the OECD’s Central Purchasing Group and worked in private sector companies in Germany, China and France, mostly in the care and medical sectors. After dual Bachelor’s degree in International Management and International Commerce in Germany and Wales, she then went on to pursue a Bachelor’s and Master’s in Political Science and  Sociology in Germany, Singapore and France. She is a German national and is fluent in French and English, speaks Spanish and is learning a few other languages.


Camille Marec

Camille joined the PISA team in June 2018 as an intern. Prior to joining the OECD, she completed an MSc in Economics at the London School of Economics. She also holds a BSc in Economics and Mathematics from the Toulouse School of Economics. Camille speaks French, English and Spanish.


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.


Jeffrey Mo

After an internship in 2011, Jeffrey rejoined the OECD’s Directorate for Employment, Labour, and Social Affairs in early 2015 and moved to the PISA team in August 2016. He holds a double BSc in Chemistry and Biochemistry from the University of Calgary in Canada, an MSc in Chemical Engineering from the Massachusetts Institute of Technology, and an MSc in Econometrics and Mathematical Economics from the London School of Economics. Jeffrey is originally from Canada and speaks English, French, and conversational German, Cantonese, and Mandarin.


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.


Tomoya Okubo

Before joining the OECD, Tomoya was an associate professor at the National Center for University Entrance Examinations, Japan. He holds a PhD in Psychometrics from Tokyo Institute of Technology. His fields of expertise are Psychometrics and Statistical Modelling, especially for educational assessment data. Tomoya has been involved in developing many large-scale and high-stakes tests, and led a project on digitalisation for the national examinations in Japan.
Tomoya speaks Japanese and English and is studying German and French.


Lesley O’Sullivan
Project Support Co-ordinator

Lesley joined the Education Directorate in May 2016 having previously worked for two and a half years with the Directorate for Financial and Enterprise Affairs. She initially worked with the PISA for Development project before joining the main PISA Administration team.  Her responsibilities involve financial management tasks, voluntary contribution and grant management, liaison with non-member countries and procurement assistance.  Lesley holds a BA in English Literature and Sociology and Politics from National University of Ireland, Galway and a post graduate qualification in Education.  She is an Irish national and has been living in Paris since 2007.


Judit Pál

Judit joined the PISA team in 2014. As a statistician, she is responsible for the data infrastructure of PISA, and she is also involved in preparing reports and modules, in particular on student well-being. In other parts of the Directorate for Education and Skills, she has also contributed to the Assessing progression in creativity and critical thinking skills project and the Teaching and Learning International Survey (TALIS). Before joining the OECD, she was a junior research fellow at the Research Center for Educational and Network Studies (RECENS) at the Hungarian Academy of Sciences, where her research used social network analysis to explore the relationship between informal status positions and negative ties including disliking and bullying in the classroom among adolescent students. She received her PhD in sociology from the Corvinus University of Budapest in 2016. Besides her native Hungarian, Judit speaks English and French.


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.


Michael Stevenson
Senior Advisor

Michael Stevenson is Senior Advisor to the PISA programme. His responsibilities include the strategic development of the PISA survey, strategic communications and support to education ministers around the world. From 2007-2013 Michael led Cisco’s education business, as VP Global Education. He also founded the Global Education Leaders Program, which he co-chaired with the Gates Foundation. Michael began his career at the BBC, initially in television current affairs, later as BBC Secretary and Director of Education. He went on to lead strategy, communications and technology at the UK Department for Education in London.


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.



Related Documents