Dr. Hakan İbrahim Tol is a Scientific Researcher specializing in district heating and cooling, energy system optimization, and renewable energy integration. With nearly 15 years of experience in low-temperature district heating and next-generation heating and cooling networks, he has expertise in thermal-hydraulic modelling, optimization-based system design, and digitalization of district energy infrastructure. Dr. Tol earned his PhD from the Technical University of Denmark in low-energy district heating, focusing on network optimization, renewable heat integration, and operational strategies. He has led research on district heating network design, demand-side management, control strategies, heat storage, and multi-energy system coupling. His technical expertise includes Python, MATLAB, VBA, QGIS, and energy system modelling tools. He has developed custom computational tools for pipe dimensioning, system-wide performance analysis, and techno-economic assessments. Dr. Tol has actively contributed to international research projects, driving innovation in thermal networks, energy-efficient urban heating solutions, and sector coupling. His work supports the transition to climate-neutral, smart district heating and cooling systems, with a strong focus on multi-energy integration and sustainable urban energy planning.