Rising energy prices and climate policy goals in Western Europe and East Asia, in addition to growing customer awareness for sustainability, have led the automotive industry to increasingly recognize energy as a decisive competitive factor. As a result, many companies have not only set ambitious targets for reducing energy consumption and CO2 emissions during the use phase, but also the production of vehicles. Since most so-called "low-hanging fruits" for energy conservation have already been harvested in recent years, more comprehensive energy management systems for the production environment are required in order to be comply with the ever-demanding targets of the future. The ambitious goal of this master thesis is to investigate possibilities to extensively integrate an energy management system into the structures of the mechanical production of the BMW Group Plant Steyr in order to leverage further potentials of reducing energy consumption for the production of powertrain components. The theoretical section contains a comprehensive literature analysis, in the course of which a combination of the energy management system according to ISO 50001 and the Energy Pentagon Model of Posch was selected as the central basis for the design of the integrated energy management system. In the practical part of the thesis the gained knowledge is applied to the framework conditions of the mechanical production of the BMW Group Plant Steyr to design an integrated energy management system on the production level which complements the general energy management on the plant level. The main focus lies on the distribution of responsibility for energy consumption to the different functional groups in production according to use and leverage, thus ensuring an active control of the production factor energy within the existing management structures. Continuous energy data collection at production line level has been identified as the most crucial enabler for the successful implementation of energy management on production level. Thus, a holistic energy monitoring strategy for all energy carriers was introduced. In addition, the proposed structured distribution of energy management tasks to the functional groups of plant operator, maintenance, technical planning and facility management is bound to facilitate a targeted reduction of energy consumption per produced powertrain component while simultaneously minimizing additional expenses.