The Stakeholder Engagement Plan for the LIFE CHANDELIER project outlines a strategic framework to ensure effective collaboration, knowledge transfer, and dissemination of project outcomes. It classifies stakeholders based on their level of influence and interest, ensuring tailored engagement strategies for key groups such as policy makers, industry representatives, waste management companies, research institutions, and local communities. The plan defines the roles and coordination mechanisms among project partners, ensuring a structured and coherent approach to communication. It also incorporates strict compliance with data protection regulations (GDPR) to safeguard stakeholder information and maintain transparency. Additionally, measures to prevent conflicts of interest are established, ensuring impartiality and ethical decision-making throughout stakeholder interactions. By implementing this plan, the LIFE CHANDELIER project aims to maximise impact, foster strong stakeholder relationships, and promote the adoption of innovative biomethane solutions. Through structured engagement, the project will enhance knowledge exchange, policy alignment, and industry collaboration, ultimately contributing to a more sustainable and circular bioeconomy.