Our Team | Our World in Data Our World in Data Browse by topic Data Latest Resources About Subscribe Donate About About us Organization Funding Team Jobs FAQs Professor Max Roser Founder and Executive Co-Director Max is the founder of Our World in Data and began working on this free online publication in 2011. Today, he serves as the publication’s editor and leads the team as its co-director. He is the Professor of Practice in Global Data Analytics at the University of Oxford’s Blavatnik School of Government, the Programme Director of the Oxford Martin Programme on Global Development, and the Executive Co-Director of Global Change Data Lab, the non-profit organization that publishes Our World in Data. For inquiries, please get in touch with Max’s Executive Assistant, Angela Wenham, at [email protected]. @MaxCRoser @maxroser.bsky.social max.roser.owid @max.roser.owid Max Roser Angela Wenham Executive Assistant to Prof. Max Roser Angela joined us in 2024 as Max Roser’s executive assistant. Her background is in Project Management and she holds an MSc in Psychology from Oxford Brookes University. [email protected] Dr. Esteban Ortiz-Ospina Executive Co-Director Esteban is the Executive Co-Director of Our World in Data alongside Max Roser. In tandem, they lead Global Change Data Lab, the non-profit organization responsible for publishing Our World in Data. Esteban is also an Honorary Researcher at the Oxford Martin Programme on Global Development, where his research and writing cover topics including economic development, public sector analysis, education, and a wide range of related issues. Prior to joining the team at Our World in Data, Esteban was a Departmental Lecturer in Economics at the University of Oxford’s Blavatnik School of Government, from 2013 to January 2016. Esteban completed his doctoral studies at the University of Oxford (DPhil Economics). @eortizospina @eortizospina [email protected] Joe Hasell Head of Product and Design Joe joined us in 2017. As Head of Product and Design, he coordinates efforts to develop tools and layouts that make our research and data more accessible and understandable. He also contributes as a researcher, where his work focuses on global trends in poverty and economic inequality. [email protected] @JoeHasell Edouard Mathieu Head of Data and Research Edouard joined us in 2020 as our Head of Data, before becoming Head of Data and Research in 2023. He manages the team of data scientists and researchers who produce our articles and data visualizations. He previously worked as a data scientist at the University of Oxford, in the Population Health and Primary Care Health Sciences departments. He holds a master’s degree from Sciences Po Paris. [email protected] Edouard Mathieu @redouad Dr. Hannah Ritchie Deputy Editor and Science Outreach Lead Hannah joined us in 2017. She became Deputy Editor and Science Outreach Lead at Our World in Data in 2023. She was previously Head of Research. She focuses on the long-term changes in the environment – energy, pollution, agriculture, food supply – and their compatibility with global development. Hannah completed her Ph.D. in GeoSciences at the University of Edinburgh. She is a researcher at the Oxford Martin Programme in Global Development. She has published two books on environmental issues & climate change, and also writes about these topics on her Substack. @_HannahRitchie @hannahritchie.bsky.social By the Numbers (on Substack) Daniel Bachler Head of Engineering Daniel joined us in 2021 as our Principal Software Engineer. He became Head of Engineering in early 2025. Previously he worked on scientific data management and visualization solutions in the life sciences. He studied film directing and now focuses on applying both his engineering and creative background on improving our visualization tools. [email protected] @danyx23 danielbachler.de Communications Dr. Charlie Giattino Communications & Outreach Strategy Lead Charlie joined us in 2020. He has worked across our team: initially joining as a researcher, later moving to our operations team, and now leading our communications. He completed his Ph.D. in cognitive neuroscience at Duke University. [email protected] @charliegiattino Data & Research Tuna Acisu Data Scientist Tuna joined us in 2024. She previously worked on machine learning for epigenetic data and in management consulting. She has an M.Sc. in Data Science from the Technical University of Munich. [email protected] @antea04 @antea04.bsky.social Tuna Acisu Pablo Arriagada Data Scientist Pablo joined in 2022 to expand OWID’s work on poverty, inequality, and economic development. Before this, he was a consultant in data analysis, data visualization, and data science for academic and journalistic research in Chile, and previously worked in institutional data analysis for higher education. He has an MPA in Public and Economic Policy from the London School of Economics. [email protected] @parriagadap @parriagadap.bsky.social Pablo Arriagada Dr. Bastian Herre Politics & Society Lead Bastian joined us in 2021. He works on human rights, democracy, armed conflict, and violence. Contact him if you have questions about his topics or related data, need advice on which data source to use, or have suggestions for new articles or data sources. Bastian has a Ph.D. in Political Science from the University of Chicago and an MA in Political Science and Economics from Heidelberg University. He is a Project Lead at the Global Change Data Lab and an Honorary Researcher at the Oxford Martin School. [email protected] Bastian Herre @bbherre @[email protected] @bastianherre.bsky.social @bbherre bastianherre.com Lucas Rodés-Guirao Senior Data Scientist Lucas is a Senior Data Scientist at Our World in Data, mostly working on the curation of various datasets and the data infrastructure. He joined in 2021, after working as a Deep Learning Researcher at the National Institute of Informatics (Tokyo, Japan) and as a Data Scientist for the private sector. He studied an M.Sc. in Electrical Engineering at UPC (Barcelona, Spain) and KTH (Stockholm, Sweden). [email protected] @lcsrg.me lcsrg.me Dr. Bertha Rohenkohl Research and Data Economics Lead Bertha joined us in 2024. She works on poverty, inequality, economic growth, and a range of related topics. Bertha has a Ph.D. in Economics from the University of Sheffield and a double M.Sc. in Economic Development from the University of Warwick and Lund University. [email protected] Dr. Pablo Rosado Principal Data Scientist Pablo joined in 2022. He holds a Ph.D. in Astrophysics and Data Analysis from the Max Planck Society, where he conducted research on gravitational wave detection and radio astronomy. With over a decade of experience across academia and industry, he has applied advanced machine learning and data science in sectors such as finance, renewable energy, and intellectual property. [email protected] Pablo Rosado youtube.com/@altrufisica pablorosado.com Dr. Fiona Spooner Senior Data Scientist 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 modeling the Covid-19 pandemic. She has a Ph.D. in Ecology and Environment from UCL (London, UK) and an MSc in Conservation Science from Imperial College (London, UK). [email protected] spoonerf.bsky.social Product, Design, & Engineering 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. [email protected] Marwa Boukarim Senior Designer Marwa joined us in 2022 as a freelance UX/UI designer. She is helping refine, define and document a consistent design system for the OWID website. Previously, she worked on designing end-to-end digital experiences for clients in the public sector, telco, and entertainment industries at Frog Milan. [email protected] marwaboukarim.com Marcel Gerber Full Stack Engineer Marcel joined us in 2020. He is helping us build and improve our data visualization tools and the website as a whole. Marcel holds a master’s degree in computer science from RWTH Aachen University. [email protected] @MarcelGerber9 Dr. Bobbie Macdonald Senior Data Scientist Bobbie joined us in 2020 to contribute to our data management team. In 2023, he joined the Product and Design team, working on Analytics. He has a Ph.D. in political science from Stanford University and an MSc in international development from the London School of Economics. [email protected] @bnjmacdonald Sophia Mersmann Senior Data Visualization Engineer Sophia joined us in 2023 to focus on our in-house visualization library, Grapher. Previously, she worked as Data Visualization Engineer in the newsroom as part of a data journalism team at rbb|24 in Berlin. Sophia lives in Frankfurt. [email protected] @sophiamersmann Martin Račák Senior Full Stack Engineer Martin joined in 2024 to focus on improving our site and content management system. He studied computer science and previously worked in forecasting, telecommunications, and built websites for various clients. [email protected] Ike Saunders Full Stack Engineer Ike joined us in 2022. He’s a web developer originally from Aotearoa New Zealand, now based in Montreal, and if he’s not tinkering with our website’s codebase, he’s probably drumming or watering his plants. [email protected] Mojmír Vinkler Senior Data Engineer Mojmír joined us in 2022 as a data engineer. He studied statistics and computer science, which he applied to various machine learning projects in healthcare, fintech, and travel. Now he’s trying to improve our data infrastructure to improve the lives of our data analysts. [email protected] Operations Antoinette Finnegan HR Manager Antoinette joined us in 2023 as our Human Resources (HR) Manager. She most recently worked in HR for a biotech spinout, and also has experience in fundraising and marketing. [email protected] Natalie Reynolds-Garcia Operations and Administration Officer Natalie joined us in 2022 as Operations and Administration Officer. Her background is in research administration and education, having taught Spanish, French and English. She was previously the administrator for the Rees Centre at the University at Oxford. [email protected] Valerie Rogers Muigai, CGMA Senior Finance and Operations Manager Valerie joined OWID in 2021. She is a CGMA-certified management accountant with an MBA from Oxford Saïd Business School. Before joining OWID, she spent over a decade working in social enterprise and international development in East Africa. [email protected] Former Team Members Dr. Veronika Samborska Data Scientist Veronika worked with us from 2023–2026. She has a Ph.D. in Computational Neuroscience at the University of Oxford, and previously worked in the Data Journalism team at the Financial Times. Dr. Hassan Masum Principal Development and Strategy Counselor Hassan has worked in diverse sectors including data leadership, global health, health R&D, collaborative technologies, foresight, research, and engineering. He has a Ph.D. in Computer Science. Simon van Teutem Writer Simon worked with us from 2024–2025. Previously he wrote for Dutch media outlet De Correspondent, where he focused on topics such as migration, aging populations, factory farming, and politics. He has also pursued a Ph.D. in Politics at the University of Oxford. @S_VanTeutem Saloni Dattani Researcher Saloni worked with us from 2021–2025 as a researcher and Project Lead…