Dr.techn. Karthik Subramanya Bhat, M.Sc., is a Researcher/Lecturer at the University of Applied Sciences Technikum Wien, Vienna, Austria, who is affiliated with the Competence Centre ‘Resilient Energy Systems’ within the Renewable Energy Systems research focus group. He holds a PhD (Dr.techn.) in Electrical Engineering with a specialization in Energy Economics from Graz University of Technology, Austria. He obtained his Master of Science in Power Engineering from the Technical University of Munich, Germany, focusing on renewable energy system modeling, and a Bachelor of Engineering in Mechanical Engineering from R.V. College of Engineering, Bengaluru, India (VTU). Dr. Bhat has extensive experience in techno-economic modeling and simulation of renewable, resilient, and smart energy systems, as well as renewable energy communities. His work includes active participation and management of several international/ Pan-European research projects addressing energy communities, smart energy systems, and e-mobility. His current research interests focus on integrated energy systems, sector coupling, and climate-neutral urban energy solutions. He serves as the Operating Agent for the IEA Cities TCP Task 4 “Climate Neutral Districts,” contributing to international efforts toward sustainable and resilient urban transformations.