Effective energy management has become increasingly crucial for companies due to the need to enhance competitiveness in the face of resource scarcity. By investing in energy management (EM), companies can reduce energy consumption and costs. One way to achieve this is by implementing an energy management system (EnMS), which can serve as a blueprint for companies looking to incorporate EM practices. However, integrating EnMS with digital technologies can be challenging. To help organizations structure their EnMS with the support of digital technologies, this paper proposes guidelines based on a thorough content analysis of literature and expert interviews. In total, 23 guidelines were proposed across four dimensions, and they were refined by specialists with at least five years of experience in the industry, consulting, or academia. These guidelines can help organizations of any size or sector optimize their EM practices by effectively integrating EnMS and digital technologies. The guidelines were successfully applied in three departments of an automotive company and related to the company's current practices. By implementing them, organizations can reduce their energy consumption and costs while enhancing their competitiveness.