The BOOST project addresses the significant disparities in innovation capacity among the EU Widening Countries, primarily in Eastern Europe. Although these nations excel in academic research, they struggle to translate their achievements into commercially viable products and services. This gap negatively affects the social, financial, and environmental sustainability of these regions, limits economic growth, and exacerbates issues like brain drain and low career opportunities for researchers and innovators. BOOST aims to strengthen the R&I capabilities of Widening Countries by fostering collaboration between academic and non-academic sectors. It focuses on enhancing career opportunities and entrepreneurship by providing researchers with the skills needed to succeed in both academic and industrial settings. A key element is the creation of the BOOST Learning Environment, which will facilitate knowledge exchange and collaboration among organizations across Europe, giving access to a rich database of tools, resources, and learning modules. Central to the project is the implementation of the BOOST ERA Talents Scheme, which provides 12-month mobility opportunities for 60 researchers, improving their practical skills through placements in industry settings. The scheme also includes five tailored learning modules, and each participant will receive a Personal Career Development Plan to support long-term career advancement. The project ensures that at least 30% of mobility participants will be women or individuals from underrepresented groups, addressing the imbalance that persists in R&I fields. BOOST provides broad sectoral expertise through its consortium partners. By focusing on skill development, practical training, and cross-sector collaboration, the project will create a sustainable impact that extends beyond its duration, helping Widening Countries improve their R&I capabilities and compete on the global stage.