The destruction of infrastructure and industrial facilities, which directly affects the livelihood of society, does not allow businesses to plan their investments confidently. The post-war reconstruction of Ukraine will require mobilising significant resources and efforts and searching for effective ways and tools to emerge from the crisis. In this regard, exploring ways to develop Ukraine’s investment climate under wartime conditions is necessary. The research aims to assess the destruction of infrastructure during the war and its impact on Ukraine’s investment attractiveness. Potential challenges to the project management system and the coordination of domestic and international investments in the post-war period caused by the destruction of infrastructure are outlined. The necessity for the transformation of management structures at the local and regional levels, as well as the improvement of regulatory and legal support for infrastructure functioning under potential military threats, has been identified. The foundations of adequate energy security in integrating into the single European energy space, sustainable energy independence, and the engagement of renewable energy potential have been analysed. The prospects for optimising the state of critical energy infrastructure in Ukraine are considered, including the diversification of supply, the modernisation of the energy system, and improving legislation by European requirements. Directions for developing the investment climate in Ukraine and attracting foreign investors during wartime and post-war periods have been identified. It has been proven that the vulnerability of critical energy infrastructure causes price instability in the energy market, destructive environmental impacts, geopolitical risks, and socio-economic instability, synergistically leading to a decrease in the country’s investment attractiveness. Improving strategies and approaches to ensuring infrastructure security during

wartime will allow for optimising the investment climate and integrating effective methods to ensure sustainable development during the post-war recovery period.