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About the Role:

As a Senior Behavioural Strategist at Monks, you will lead and shape the strategic direction of behaviour change campaigns, working closely with creative teams and clients alike. You will drive the integration of behavioural science with innovative creative approaches to ensure not only groundbreaking campaigns but also highly effective outcomes. Your work involves in-depth analysis of target audiences, translating complex research into actionable insights, and developing comprehensive behavioural strategies that drive measurable change. *This is a Dutch speaking role*.

You will also be a thought leader, mentoring junior strategists and leading client engagements, establishing yourself as a trusted advisor and expert.

Responsibilities:

• Lead the development and implementation of behaviour change campaigns for a diverse portfolio of clients, including major organisations in the public and non-profit sectors –  including from the Ministerie van OCW, Ministerie van BZK, De Douane, to clients such as ProRail and KWF.
• Collaborate with creative teams to ensure that the creative concepts are not only surprising and innovative but also align with the chosen behaviour change techniques.
• Conduct in-depth research into your target audience in collaboration with research agencies and identify the main drivers and barriers.
• Develop and refine advanced behaviour change strategies based on comprehensive analysis of key drivers and barriers, presenting these strategies convincingly to clients and internal teams. 
• Lead client presentations in which you convincingly convey the target audience analysis and behavioural strategy, and build long-term client relationships.
• Mentor and guide junior behavioural strategists, fostering their professional development and contributing to the growth of the behavioural strategy team

About You:

The Essentials:

• For this role, we are looking for someone with 4+ years of experience in behaviour change, behavioural research, and/or leading strategic campaign development.
• Fluency in Dutch.
• You have an interest in behaviour change - You want to understand why people behave as they do and think in solutions to achieve behaviour change.
• Exceptional ability to synthesise complex data and insights into clear, compelling narratives, effectively communicating strategic principles and the emotional drivers behind behaviour.

At .monks, we believe in fostering an environment where a diversity of perspectives can thrive. We proactively work to design hiring processes that promote equity and inclusion while mitigating bias. We celebrate diversity and are committed to building a team that reflects the communities we serve. We welcome and encourage qualified applicants, from all backgrounds, who are excited to contribute to our mission.

About Monks 

Monks is the global, digital-first, data-driven, unitary operating brand of S4 Capital plc. With a legacy of innovation and specialized expertise, Monks combines an extraordinary range of global Marketing and Technology Services to redefine how brands interact with the world. Through Monks.Flow, its flagship AI ecosystem for marketing orchestration, Monks transforms marketing into a growth engine, collapsing timelines and connecting brands to culture in real time. By deploying bespoke intelligent agents across disciplines and delivering culturally relevant, high-impact creative and digital solutions, Monks solves key critical business challenges across the entire brand enterprise to help brands sustain long-term impact.

Monks was named a Contender in The Forrester Wave™: Global Marketing Services, ranks among Cannes Lions' Top 10 Creative Companies (2022-25) and remains the only partner featured in AdExchanger’s Programmatic Power Players list every year (2020-24). Named Adweek’s first AI Agency of the Year (2023) and The One Show’s inaugural AI Pioneer Organization, Monks was also awarded Business Intelligence Group’s 2025 Excellence in Artificial Intelligence Award in both the Organizational and AI Product categories. As a trusted partner to cutting-edge innovators in tech, Monks earned titles such as Optimizely Experimentation Partner of the Year (2025), runner-up for the Adobe Firefly Partner Award (2024), and Workato’s AI Visionary Customer Impact Award (2024). Additionally, Monks achieved a record-breaking number of FWAs and continues to hold the most of any partner.

We are an equal-opportunity employer committed to building a respectful and empowering work environment for all people to freely express themselves amongst colleagues who embrace diversity in all respects. Including fresh voices and unique points of view in all aspects of our business not only creates an environment where we can all grow and thrive but also increases our potential to produce work that better represents—and resonates with—the world around us.