Quantum computing hardware continues to advance rapidly, becoming increasingly accessible to the public. Theoretical evidence suggests that quantum computing exhibits exponential advantages in various domains, including optimization, materials research, and drug discovery, among others. The energy sector is projected to be among the initial industry sectors to experience long-term advantages from quantum computing methods. The future energy systems domain, which includes transportation, low-carbon fuels and decarbonization, sustainable building design, smart grids, and electricity, is examined in this chapter along with possible use-cases of quantum computing technologies. © 2025 selection and editorial matter, Mohammad Hammoudeh, Clinton Firth, Harbaksh Singh, Christoph Capellaro, and Mohamed Al Kuwaiti; individual chapters, the contributors.