Many of the most significant challenges facing Europe, from climate change to social shifts, require active public involvement in decision-making to build trust and prevent polarisation. Citizen Science (CS), the active participation of the public in scientific research, offers a powerful bridge between the scientific community, policy-makers, and civil society. Despite strong public interest, a gap remains between the desire to contribute and the institutional opportunities to do so. The IMPETUS Program: A Unique Approach The IMPETUS project (funded by Horizon Europe) was designed to address systemic barriers such as fragmented funding and limited formal recognition. Through its Accelerator programme, it provided €2.55 million in tiered grants to 129 citizen science initiatives (CSIs). What made IMPETUS unique was its focus on: ● Tiered financial support: Differentiated grants (kick-start vs. sustaining) ensured accessibility for grassroots initiatives while supporting the growth of mature projects. ● Non-financial capacity building: Projects received intensive mentoring (avg. 14 hours), "bootcamps," and training in data quality (FAIR principles), impact reporting, and strategic advocacy planning. ● Innovative engagement: Rather than relying solely on written briefs, IMPETUS utilised Data Walks (on-site discussions between citizens and officials) and Backcasting Workshops using future scenarios to envision the citizen science landscape of 2030. ● High-level recognition: The project coordinated the European Union Prize for Citizen Science to validate citizen science achievements and their relevance to policymaking.