(Listed in alphabetical order)
Pablo Arriagada
Data Scientist
Pablo joined in 2022 to expand the OWID database on data related to 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.
Daniel Bachler
Principal Software Engineer
Daniel joined us in 2021. 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.
daniel.bachler@ourworldindata.org / @danyx23 / danielbachler.de
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.
Marwa Boukarim
Lead Visual 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.
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.
marcel [at] ourworldindata [dot] org / @MarcelGerber9
Joe Hasell
Head of Product and Design
Joe joined us in 2017. He works across teams to develop tools and layouts that make 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. He is currently working towards a Ph.D. at the University of Oxford.
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.
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.
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. He completed his doctoral studies at the University of Oxford (DPhil Economics).
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.
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 development of food supply, agriculture, energy, and environment, and their compatibility with global development. Hannah completed her Ph.D. in GeoSciences at the University of Edinburgh.
Lucas Rodés-Guirao
Senior Data Scientist
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 an M.Sc. in Electrical Engineering at UPC (Barcelona, Spain) and KTH (Stockholm, Sweden).
Valerie Rogers Muigai
Senior Finance and Operations Manager
Valerie joined us in 2021 after more than a decade of working in international development and social enterprise in East Africa. She has an MBA from Oxford Saïd Business School and an Advanced Diploma in Management Accounting from the Chartered Institute of Management Accountants.
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.
Dr. Pablo Rosado
Principal Data Scientist
Pablo joined in 2022. He has a Ph.D. in Astrophysics and Data Analysis from the Max Planck Society in Germany. After doing postdoctoral research in Australia, he started working in Data Science for the private sector. He has been a technical mentor for Data Science for Social Good and has worked in finance and renewable energy companies, as well as the intellectual property office of the European Union.
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 Executive Co-Director of Global Change Data Lab, the non-profit organization that publishes Our World in Data.
Twitter: @MaxCRoser / Site: MaxRoser.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).
Simon van Teutem
Writer
Simon joined us in September 2024. He brings several years of writing experience with Dutch media outlet De Correspondent, where he focused on topics such as migration, aging populations, factory farming, and politics. He is also pursuing a Ph.D. in Politics at the University of Oxford.
Mojmir Vinkler
Data Engineer
Mojmir 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.
Dr. Lars Yencken
Head of Engineering
Lars joined us in 2021 to lead our engineering team and help us evolve our data visualization and our overall site. He previously led tech and data teams in consumer health at Grace Health and Lifesum in Stockholm and holds a Ph.D. in Computational Linguistics from the University of Melbourne.
Former team members
Here is a list of our former team members and contributors.