Energy is a critical element for any enterprise, regardless of its industry or size. Modern energy management (EMS) is not only a challenge but also an opportunity to improve efficiency and energy security. This article discusses the role of EMS systems in enhancing energy security, using three industrial plants as examples. The analysis focuses on identifying key factors affecting energy security, such as the availability of energy sources, diversification of supply, energy costs and efficiency, and the impact of energy policy. Using a simplified multi-criteria decision analysis (MCDA) method, the authors evaluate the impact of implementing EMS systems on improving the energy security of enterprises.