Over its 36 months, GreenFORCE successfully delivered on its four objectives, generating significant technical and scientific outcomes. Under Objective 1, a Shared Strategic Research Agenda on Just Green Transition (13 themes) was finalised through workshops and RAB consultations. Major outputs include the forthcoming open-access Palgrave Handbook on Just Green Transitions in the Western Balkans and Beyond, a special issue in EUROPA XXI with 10 papers, and five policy briefs translated into local languages. All results are openly accessible in Zenodo, GERY, and the project website. For Objective 2, the RAB provided guidance through three meetings, while capacity-building included 15 teaching exchanges, 12 secondments, and three stand-alone teaching events in Turin, Belgrade, and Tirana, engaging 27 WB researchers and over 700 students. Three Summer/Winter Schools were also organised, and research units at Co-PLAN, CEA, and UB-GEF were consolidated. Under Objective 3, GreenFORCE developed a conceptual framework for JGT validated with 77 stakeholders, delivered five country mapping reports plus a regional synthesis, and completed five national research cases with datasets and cost–benefit analyses. Two comparative studies on governance and monitoring frameworks were produced, while co-assessment workshops with 90 stakeholders informed the Framework for Monitoring JGT in the WB. Finally, Objective 4 was achieved through strong dissemination, with findings presented at over 10 major international conferences (AESOP, RSA, European Week of Regions and Cities), and regional networking strengthened via TG-WeB, RCC, NALAS, and Nordic partners. These exchanges resulted in the Macro-Regional Pathways Report, reinforcing WB institutions as contributors to EU-level transition debates.