This fully funded four-year PhD position at Erasmus University Rotterdam offers an exciting opportunity to investigate how citizen collectives (CCs) can act as early detectors and mediators of societal tensions arising from sustainability transitions in the Netherlands. The project is situated within the Erasmus School of Social and Behavioural Sciences (ESSB) and is linked to the Erasmus School of Philosophy, with research conducted in collaboration with the Governance & Pluralism team and the broader ECCO (Empowering Citizen Collectives) consortium, which unites 11 PhD projects across Dutch universities. The research focuses on understanding and addressing the societal challenges and polarization that emerge during transitions toward sustainability and justice. You will explore how CCs identify and respond to 'transition tensions'—such as conflicts between urgent climate action and equity—before they escalate, and how their community-based engagement can help avoid backlash and advance just societal change. The project employs methods like multi-criteria mapping and participatory action research, with the aim of co-designing interventions and developing a practical 'Pluralizer tool' to support CCs in navigating and embracing inherent conflicts during transitions. As a PhD researcher, you will independently design and implement the research, collect and analyze longitudinal data from multiple CCs, collaborate with other PhD students in the ECCO consortium, and contribute to both academic publications and societal knowledge exchange. The position offers tailored research training and development through the Erasmus Graduate School of Social Sciences and the Humanities, as well as access to a vibrant community of peers and academic teams. Eligibility: Applicants must have a Master’s degree in a relevant field (e.g., social and cultural anthropology, public administration, sociology, political science, transition studies, or social geography). A strong interest in sustainability transitions, citizen collectives, and/or societal polarization is essential. Experience with qualitative research methods, such as ethnographic or participatory action research, is preferred. Candidates should be comfortable working in and with communities, motivated for both academic and practice-oriented research, able to work independently and collaboratively, and possess excellent proficiency in Dutch (required for the research context) and English. Strong communication skills are also required. Funding and Benefits: The position is fully funded for four years, with a starting salary of €3,059 gross per month (full-time, 38 hours), in accordance with the CAO-NU. The initial contract is for one year, with a three-year extension upon proven suitability. Additional benefits include 41 days of paid leave (with a 40-hour contract), 8% holiday pay, 8.3% end-of-year bonus, pension contributions, work-life balance support, partially paid parental leave, and relocation assistance (including eligibility for the 30%-ruling for international hires). Application Process: Submit your application, including a motivation letter and CV, via the Erasmus University Rotterdam vacancies portal before the deadline of 15 January 2026. The selection process consists of two interviews, expected to take place in mid-January and mid-February 2026. For further details, visit the official vacancy page or contact the listed academic supervisors. This position is open to candidates of all backgrounds and identities, and the university is committed to fostering a diverse, inclusive, and supportive academic environment.