A Strategic Action Plan for Sustainability functions as a structured and forward-looking roadmap that enables organizations to systematically develop, implement, and communicate their sustainability commitments. As both a management and planning tool, it translates strategic intent into operational actions, guiding the integration of sustainability objectives across all levels of the organization. The purpose of this chapter is to outline the key steps involved in the formulation of a Strategic Action Plan for Sustainability, with a particular focus on the role of sustainability strategy consultants in facilitating this process. Consultants act as critical enablers, supporting organizations in aligning their sustainability ambitions with regulatory requirements, stakeholder expectations, and industry best practices. The chapter begins by introducing the ESG assessment process, which serves as the foundation for strategic planning. This involves evaluating the organization’s current ESG maturity, awareness, and performance across planning, reporting, and communication dimensions. Based on this diagnostic, consultants assist in defining clear sustainability targets and objectives, and in developing an actionable roadmap to achieve them. Subsequently, the chapter presents a benchmarking-based approach for identifying potential sustainability actions. This method allows organizations to compare their practices against peers and standards, uncovering opportunities for improvement and innovation. The prioritization of these actions is then addressed, taking into account budgetary constraints, strategic relevance, and stakeholder expectations. Finally, the chapter provides practical guidance on how to structure and communicate the Strategic Action Plan, ensuring it is both operationally viable and strategically aligned. This includes recommendations for internal governance, performance monitoring, and reporting mechanisms that support transparency and continuous improvement.