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Our Team

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Dr. Max Roser

Founder and Director

Max is the founder and director of Our World in Data. He began the project in 2011 and for several years was the sole author, until receiving funding for the formation of a team. Max’s research focuses on poverty, global health, and the distribution of incomes. He is also Programme Director of the Oxford Martin Programme on Global Development at the University of Oxford, and Co-executive Director of Global Change Data Lab, the non-profit organization that publishes and maintains the website and the data tools that make our work possible.

Twitter: @MaxCRoser / Site: MaxRoser.com

Lead researchers

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Dr. Esteban Ortiz-Ospina

Senior Researcher and Head of Operations

Esteban joined us in 2016. He is a Senior Researcher and Head of Operations at Our World In Data. He is also the executive co-director of Global Change Data Lab, the non-profit organization that publishes and maintains the website and the data tools that make our work possible. Esteban does research on economic development, the public sector, education, and a wide range of related topics. He completed his doctoral studies at the University of Oxford (DPhil Economics).

esteban@ourworldindata.org / @eortizospina

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Dr. Hannah Ritchie

Senior Researcher and Head of Research

Hannah joined us in 2017. She is Senior Researcher and Head of Research at Our World In Data. She focuses on the long-term development of food supply, agriculture, energy, and environment, and their compatibility with global development. Hannah completed her PhD in GeoSciences at the University of Edinburgh.

hannah@ourworldindata.org / @_HannahRitchie

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Joe Hasell

Research Project Manager

Joe joined us in 2017. His research focuses on economic inequality, economic growth, and poverty. He is also leading large research projects that require the composition of new datasets. He researched the long-term history of famines and is currently researching the history of poverty and the history of war.

joe@ourworldindata.org / @JoeHasell


Dr. Charlie Giattino


Charlie joined us in 2020. His work touches on a number of topics, including health, technology, and more. Charlie completed his PhD in Cognitive Neuroscience at Duke University.

charlie@ourworldindata.org / @charliegiattino

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Dr. Bastian Herre


Bastian joined us in 2021 to improve and expand our data and research on democracy and conflict. Bastian has a PhD in Political Science from the University of Chicago and an MA in Political Science and Economics from Heidelberg University.

bastian@ourworldindata.org / @bbherre bastianherre.com

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Saloni Dattani

Researcher (Part-time)

Saloni joined us as a researcher in 2021. She has a graduate degree in psychiatric genetics and is working towards a PhD at the University of Hong Kong and King’s College London. She is working with us as a researcher on health-related topics including mental health.

saloni@ourworldindata.org / @salonium

Data management

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Edouard Mathieu

Head of Data

Edouard joined us in 2020 as our Head of Data, working on the whole chain of collection, transformation, documentation, and dissemination of our data. He previously worked as a data scientist at the University of Oxford, at the departments of Population Health and Primary Care Health Sciences. He holds a master’s degree from Sciences Po Paris.

edouard@ourworldindata.org / @redouad

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Lucas Rodés-Guirao

Senior Data Analyst

Lucas joined us in 2021. He previously worked as a Deep Learning Researcher at the National Institute of Informatics (Tokyo, Japan) and as a Data Scientist for the private sector. He studied a M.Sc. in Electrical Engineering at UPC (Barcelona, Spain) and KTH (Stockholm, Sweden).

lucas@ourworldindata.org / @lucasrodesg

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Dr. Fiona Spooner

Senior Data Analyst

Fiona joined us in 2021. She was previously a Turing postdoctoral fellow at the University of Exeter working on tracking the Sustainable Development Goals and modelling the Covid-19 pandemic. She has a PhD in Ecology and Environment from UCL (London, UK) and an MSc in Conservation Science from Imperial College (London, UK).

fiona@ourworldindata.org / @f_spooner

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Dr. Bobbie MacDonald

Senior Data Analyst (Part-time)

Bobbie joined us in 2020 to contribute to our data management team. He has a PhD in political science from Stanford University and an MSc in international development from the London School of Economics.

bobbie@ourworldindata.org / @bnjmacdonald

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Cameron Appel

Data Analyst (Part-time)

Cameron joined us in 2019 as a research assistant and is currently supporting our data management team. He has a BA in economics from Columbia University.

cameron@ourworldindata.org / @appel_cam

Web development

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Ernst van Woerden

Head of Product Design

Ernst joined us in 2020. He is a designer at the intersection of data and storytelling. Over the past 11 years, he has explained complex startup technology using explainer animations, designed interfaces to help diabetes patients make sense of their health data, worked on the storyline of product launch keynotes at Xiaomi, and tried to give job seekers insight into their salary.

ernst@ourworldindata.org / @erniedesigns

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Dr. Lars Yencken

Technical Team Lead

Lars joined us in 2021 as our Technical Team Lead, helping us to evolve our engineering and data visualisation practices. He previously led tech and data teams in consumer health at Grace Health and Lifesum in Stockholm, and holds a PhD in Computational Linguistics from the University of Melbourne.

lars@ourworldindata.org / @larsyencken

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Daniel Bachler

Principal Software Engineer

Daniel joined us in 2021. Previously he worked on scientific data management and visualisation solutions in the life sciences. He studied film directing and now focuses on applying both his engineering and creative background on improving our visualisation tools.

daniel.bachler@ourworldindata.org / @danyx23

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Daniel Gavrilov

Software Engineer (Part-time)

Daniel joined us in 2018 and is helping develop the OWID-Grapher and maintain the website as well as the automated fetchers that keep our datasets up to date.


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Matthieu Bergel

Senior Software Engineer

Matthieu joined in 2019 and has the overall mission of providing readers with a flowing experience between data and research throughout the publication. Drawing on his consulting experience from communication agencies in Paris, he is now building the next iteration of our content management system.



Marcel Gerber

Software Engineer (Part-time)

Marcel joined us in 2020. Alongside his computer science studies, he is helping us build and improve our data visualization tools and the website as a whole.

marcel@ourworldindata.org / @MarcelGerber

Operations and Strategy

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Valerie Rogers Muigai

Strategy and Operations Manager

Valerie joined us in 2021 as Strategy and Operations Manager. She has over a decade of experience in international development and social enterprise in East Africa and is the founder of Kijani Uganda. She recently completed an MBA at Oxford Saïd Business School.



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Jason Crawford

Software Team Lead (Part-time Advisor)

Jason Crawford is the former CEO and co-founder of Fieldbook, and has been an engineering manager at companies including Amazon and Flexport. He is the author of The Roots of Progress, where he writes about the history of technology and industry.

jason@ourworldindata.org / @jasoncrawford


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Diana Beltekian

Research Assistant (Part-time)

Diana joined us in 2017 and as a research assistant she is researching on the long-term history of a large number of aspects including trade, education, and technological change.

diana@ourworldindata.org / @diana_beltekian

Former team members

A list of our former team members and contributors can be found here.