Today’s advanced cellular networks struggle to cope with the ever-increasing real-time and non-real time service demands of highly mobile users. The plethora of these services requests leads the provision of novel next generation communications modes. As one of these convenient solutions to foster new demands and services, the implementation of the Heterogeneous Networks, HetNets, has emerged as a promising approach among academic and industrial researchers. However, the implementation of HetNets has also brought huge energy consumption and energy efficiency challenges. The execution of energy aware and green communication paradigms in HetNets still remains to be addressed. This workshop is expected to merge researchers with academic and industrial visions in order to discuss the major aforementioned challenges and to stimulate novel contributions in energy aware HetNets implementations with powerful physical and software-defined networking points of view.