Hassam Ur Rehman (D.Sc.) has completed a Ph.D. in the field of Energy Engineering from Aalto University, Finland. Presently, he is working as a senior scientist at the VTT Technical Research center of Finland. He is also a Postdoctoral researcher fellow at the Research Council of Finland (Suomen Akatemia) and a PI. To these roles, he brings the experience in building energy simulation, energy system design for buildings, community-sized energy systems, energy storage, electric vehicle, and multi-objective optimization for the planning of a stable and carbon-neutral society. Currently, he is involved in developing positive energy building concepts and energy resilience at the national and European level, along with technical, social, and business-related studies. He is representing Finland in the International Energy Agency (IEA), Energy in Buildings and Communities (EBC) as an Executive Committee member, leading the Annex on Energy resilience (operating agent), and coordinating IEA EBC Annex83.