Economies in transition (EiTs) (e. g. Ukraine (UA), Belarus, Moldova, etc.) are signifi cantly dependent on energy imports, and require revitalization of their agricultural sectors and improvements in the state of the environment. Development of national bioenergy potentials can contribute to the solutions to these problems. However, EiTs face technical, political, fi nancial, and capacity-based constraints in their transition to bioenergy.Biomass can potentially deliver 18% (1 EJ yr-1) in UA's energy balance while the current fi gure is only 0.7%. The bioenergy sector is not established in UA. This work identifi es facilitating and constraining factors for the transition to agro-bioenergy in UA, and suggests strategies to pursue such transition.A conceptual framework -agro-biomass framework for organisation and action (ABF) -developed by the author applies a technology innovation system (TIS) approach, which is expanded to include four categories of analysis: actors and networks, natural resources, technical resources, and non-technical components. Seven TIS functions are analyzed in relation to each category within UA's bioenergy sector. The results are presented as constraining and facilitating factors for bioenergy in UA in relation to these functions. Strategies for the enhancement of each function are formulated, and recommendations to a variety of stakeholders to facilitate the transition to agro-bioenergy in UA are made.This work establishes pre-requisites for a legitimate agro-industrial bioenergy sector in UA and is unique for the UA and EiT context. New ABFs can be further applied in a variety of settings for the analysis of bioenergy initiatives and the degree of bioenergy development.Belarus, Moldova, etc.) are characterized by signifi cant dependence on energy imports, and require revitalization of their agricultural sectors and improvements in the state of the environment. 1-3 Th e development of the countries' biomass-to-energy potentials could help resolve these problems via leveraging economic, social, and environmental bioenergy co-benefi ts. [3][4][5] Bioenergy co-benefi ts can contribute to the alleviation of such challenges as energy insecurity, unemployment, rural depopulation and poverty, poor state of the environment, etc. However, EiTs face technical, political, fi nancial, and