Introduction - a general view of the centrality of energy in human existence and the energy engineering regime. Review of the spectrum of processes related to the exploitation of energy resources and their engineering aspects. Definition of energy generating and utilizing systems. Discussion of energy quality. The state of energy in the world will be reviewed in the macro-economic aspects and future implications will be elaborated. The interactions between, energy generation and the environmental quality, the principles of sustainability, as they are implemented in the production and utilization of energy. A summary review of energy conversion and process efficiency. The roles of the energy engineer and his scope of activities in an organization. Actual examples in industry and Israeli cases will be used to demonstrate issues, including site tour/s and meetings with experts.