
This fully funded four-year PhD position is part of the Vidi project “The economy of digital influence operations”, led by Associate Professor Jon Roozenbeek. The project investigates the market infrastructure that supports disinformation and influence operations in digital environments. Through a series of studies, you will be mapping out the “online manipulation economy” where fake accounts, engagement, and even sophisticated bot armies are readily for sale. You will look at who the buyers and sellers are within this marketplace, conduct interviews with key players to understand their motivations, and build bespoke analysis pipelines of social media and financial data to understand the downstream consequences of the buying and selling of these services.
The PhD will be supervised by Associate Professor Jon Roozenbeek, who directs the Influence and Technology Lab at the Vrije Universiteit Amsterdam and the University of Cambridge, along with Associate Professor Ivar Vermeulen (VU Amsterdam).
Your duties
As a PhD candidate, you will complete a cumulative dissertation within four years at one of the world’s leading Communication Science departments in Amsterdam. You will also have close links with Cambridge, where Dr Roozenbeek’s lab is partially based.
Working closely with your supervisory team, you will plan and execute empirical studies as envisioned in the project. You will design experiments, collect and analyse quantitative data (e.g., social media data, qualitative interviews), and publish your findings in top international journals, conference proceedings, and publicly accessible brief reports. You will also be responsible for building and maintaining public-facing outputs such as the Cambridge Online Trust and Safety Index (https://cotsi.org/).
You bring a strong foundation in experimental research within data science, quantitative psychology, or (behavioural) economics, and have experience with quantitative data analysis and scientific writing. Throughout the project, you will further advance these skills and refine your ability to report research according to international standards and open-science principles. All data and materials will be made reproducible and publicly available.
As a member of our vibrant, internationally renowned department, you will broaden your professional network and develop collaborations with scholars in related fields. As a PhD candidate, you will also take part in the Graduate School of Social Sciences (GSSS), which offers a wide range of courses for your further academic development (see website, ‘Starting your PhD trajectory’). More detailed information is available upon request.
We are looking for a PhD candidate who:
We offer a rewarding, field-advancing PhD position within a vibrant, ambitious, and socially engaged department, home to internationally renowned communication science, media psychology, and computational social science scholars. Moreover, you will join the Influence and Technology Lab at Cambridge and VU Amsterdam, a friendly and collaborative environment with a strong track record of producing world-leading research.
At VU, you are embedded in an interdisciplinary environment that fosters substantial academic as well as professional development.
We offer:
We also offer you attractive fringe benefits and arrangements. Some examples:
The Influence and Technology Lab
Why do we believe some things but not others? Why do we share information about ourselves and the groups we belong to, or groups we dislike? What are the effects of propaganda during wartime? How do communication technologies shape how we feel, think, and behave? What makes interventions to address policy challenges effective? And how do we measure these things, with what kind of data?
These are some of the overarching questions that the Influence and Technology Lab seeks to answer. To do so, we rely on the most advanced methods in the social and computational sciences, by building on methodological and theoretical frameworks from computer science, psychology, and area studies. The lab has a strong cross-cultural focus, collecting data and conducting experiments in many countries around the world and combining methodological rigour with an in-depth understanding of the societies under study.
The ITLab sits between the University of Cambridge’s Department of Psychology and the Department of Communication Science at the Vrije Universiteit Amsterdam and is headed by Associate Professor Jon Roozenbeek. This position is advertised via the Vrije Universiteit Amsterdam, and the successful candidate will work primarily from here.
Faculty of Social Sciences and Humanities
A better understanding of ourselves and social communities, values and meaning, through social sciences and humanities. That is the aim of The Faculty of Social Sciences and Humanities. No single discipline can do this alone. The SSH disciplines are characterised by an open way of thinking and the natural urge to seek coherence and connection.
The faculty consists of nine academic departments within three schools: School of Religion & Theology (SRT), School of Social Sciences (SSc) and School of Humanities (SH).
Are you interested in joining Social Sciences and Humanities? You become part of a dynamic academic community with approximately 900 staff members, over 5,000 regular students and more than 5,000 course participants. In an inspiring and collegial environment, we work together on education and research with impact.
Vrije Universiteit Amsterdam
Vrije Universiteit Amsterdam stands for values-driven education and research. We are open-minded experts with the ability to think freely - a broader mind. Maintaining an entrepreneurial perspective and concentrating on diversity, significance and humanity, we work on sustainable solutions with social impact. By joining forces, across the boundaries of disciplines, we work towards a better world for people and planet. Together we create a safe and respectful working and study climate, and an inspiring environment for education and research. Learn more about our codes of conduct
We are located on one physical campus, in the heart of Amsterdam's Zuidas business district, with excellent location and accessibility. Over 6,150 staff work at the VU and over 31,000 students attend academic education.
Diversity
Diversity is the driving force of VU Amsterdam. VU wants to be accessible and receptive to diversity in disciplines, cultures, ideas, nationalities, beliefs, preferences and worldviews. We believe that trust, respect, interest and differences lead to new insights and innovation, to sharpness and clarity, to excellence and a broader understanding.
We stand for an inclusive community and believe that diversity and internationalisation contribute to the quality of education, research and our services.
Therefore, we are always searching for people whose backgrounds and experience contribute to the diversity of the VU community.
Are you interested in this position? Please apply via the application button and upload your Curriculum Vitae and short application letter (in Dutch or English; maximum 2 pages) by Monday 14 September 2026 (23.59 hr.). Interviews (in Amsterdam or online) are expected to take place between 21-30 September. Preferred starting date is Monday 4 January 2027.
Applications received by e-mail will not be considered.
Acquisition in response to this advertisement is not appreciated.

This fully funded four-year PhD position is part of the Vidi project “The economy of digital influence operations”, led by Associate Professor Jon Roozenbeek. The project investigates the market infrastructure that supports disinformation and influence operations in digital environments. Through a series of studies, you will be mapping out the “online manipulation economy” where fake accounts, engagement, and even sophisticated bot armies are readily for sale. You will look at who the buyers and sellers are within this marketplace, conduct interviews with key players to understand their motivations, and build bespoke analysis pipelines of social media and financial data to understand the downstream consequences of the buying and selling of these services.
The PhD will be supervised by Associate Professor Jon Roozenbeek, who directs the Influence and Technology Lab at the Vrije Universiteit Amsterdam and the University of Cambridge, along with Associate Professor Ivar Vermeulen (VU Amsterdam).
Your duties
As a PhD candidate, you will complete a cumulative dissertation within four years at one of the world’s leading Communication Science departments in Amsterdam. You will also have close links with Cambridge, where Dr Roozenbeek’s lab is partially based.
Working closely with your supervisory team, you will plan and execute empirical studies as envisioned in the project. You will design experiments, collect and analyse quantitative data (e.g., social media data, qualitative interviews), and publish your findings in top international journals, conference proceedings, and publicly accessible brief reports. You will also be responsible for building and maintaining public-facing outputs such as the Cambridge Online Trust and Safety Index (https://cotsi.org/).
You bring a strong foundation in experimental research within data science, quantitative psychology, or (behavioural) economics, and have experience with quantitative data analysis and scientific writing. Throughout the project, you will further advance these skills and refine your ability to report research according to international standards and open-science principles. All data and materials will be made reproducible and publicly available.
As a member of our vibrant, internationally renowned department, you will broaden your professional network and develop collaborations with scholars in related fields. As a PhD candidate, you will also take part in the Graduate School of Social Sciences (GSSS), which offers a wide range of courses for your further academic development (see website, ‘Starting your PhD trajectory’). More detailed information is available upon request.
We are looking for a PhD candidate who:
We offer a rewarding, field-advancing PhD position within a vibrant, ambitious, and socially engaged department, home to internationally renowned communication science, media psychology, and computational social science scholars. Moreover, you will join the Influence and Technology Lab at Cambridge and VU Amsterdam, a friendly and collaborative environment with a strong track record of producing world-leading research.
At VU, you are embedded in an interdisciplinary environment that fosters substantial academic as well as professional development.
We offer:
We also offer you attractive fringe benefits and arrangements. Some examples:
The Influence and Technology Lab
Why do we believe some things but not others? Why do we share information about ourselves and the groups we belong to, or groups we dislike? What are the effects of propaganda during wartime? How do communication technologies shape how we feel, think, and behave? What makes interventions to address policy challenges effective? And how do we measure these things, with what kind of data?
These are some of the overarching questions that the Influence and Technology Lab seeks to answer. To do so, we rely on the most advanced methods in the social and computational sciences, by building on methodological and theoretical frameworks from computer science, psychology, and area studies. The lab has a strong cross-cultural focus, collecting data and conducting experiments in many countries around the world and combining methodological rigour with an in-depth understanding of the societies under study.
The ITLab sits between the University of Cambridge’s Department of Psychology and the Department of Communication Science at the Vrije Universiteit Amsterdam and is headed by Associate Professor Jon Roozenbeek. This position is advertised via the Vrije Universiteit Amsterdam, and the successful candidate will work primarily from here.
Faculty of Social Sciences and Humanities
A better understanding of ourselves and social communities, values and meaning, through social sciences and humanities. That is the aim of The Faculty of Social Sciences and Humanities. No single discipline can do this alone. The SSH disciplines are characterised by an open way of thinking and the natural urge to seek coherence and connection.
The faculty consists of nine academic departments within three schools: School of Religion & Theology (SRT), School of Social Sciences (SSc) and School of Humanities (SH).
Are you interested in joining Social Sciences and Humanities? You become part of a dynamic academic community with approximately 900 staff members, over 5,000 regular students and more than 5,000 course participants. In an inspiring and collegial environment, we work together on education and research with impact.
Vrije Universiteit Amsterdam
Vrije Universiteit Amsterdam stands for values-driven education and research. We are open-minded experts with the ability to think freely - a broader mind. Maintaining an entrepreneurial perspective and concentrating on diversity, significance and humanity, we work on sustainable solutions with social impact. By joining forces, across the boundaries of disciplines, we work towards a better world for people and planet. Together we create a safe and respectful working and study climate, and an inspiring environment for education and research. Learn more about our codes of conduct
We are located on one physical campus, in the heart of Amsterdam's Zuidas business district, with excellent location and accessibility. Over 6,150 staff work at the VU and over 31,000 students attend academic education.
Diversity
Diversity is the driving force of VU Amsterdam. VU wants to be accessible and receptive to diversity in disciplines, cultures, ideas, nationalities, beliefs, preferences and worldviews. We believe that trust, respect, interest and differences lead to new insights and innovation, to sharpness and clarity, to excellence and a broader understanding.
We stand for an inclusive community and believe that diversity and internationalisation contribute to the quality of education, research and our services.
Therefore, we are always searching for people whose backgrounds and experience contribute to the diversity of the VU community.
Are you interested in this position? Please apply via the application button and upload your Curriculum Vitae and short application letter (in Dutch or English; maximum 2 pages) by Monday 14 September 2026 (23.59 hr.). Interviews (in Amsterdam or online) are expected to take place between 21-30 September. Preferred starting date is Monday 4 January 2027.
Applications received by e-mail will not be considered.
Acquisition in response to this advertisement is not appreciated.






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