The Brazilian forest-based sector (FBS) has a complex and important role in leading local and global bioeconomy and sustainable development initiatives. Among these tasks is the improvement and achievement of the Sustainable Development Goals (SDGs). However, key actors in the FBS still have different perspectives regarding their contributions to the implementation and achievement of the SDGs, and this shortage of understanding and complex problem structure may result in misleading strategic planning, which must be improved to increase and strengthen their participation. This study proposes a participatory assessment to comprehend the perceptions of the Brazilian forest-based sector’s key actors and their contributions to achieving the SDGs by using a problem structuring method (PSM). Strategic Options Development and Analysis (SODA), a method from PSM and soft operational research, was used to support the strategic decisions and assist in formulating the strategies. Following the SODA approach, this study interviewed 13 key actors from different forest sector institutions in Brazil and listed strategies to improve their contributions to the SDGs. As a result, 29 main goals and 68 strategic options were mapped. The goals reflect the key actor’s understanding of the main contributions of the Brazilian FBS to the SDGs, and the strategic options represent the main strategies that can be implemented to strengthen the participation and positioning of these institutions in Agenda 2030.