The aviation sector faces a major transformation as electric and hydrogen-powered aircraft introduce complex engineering and operational hurdles for maintenance, repair, and overhaul (MRO) providers. Traditional heavy turbine maintenance will decrease significantly, shifting revenue toward specialised support services, battery management, and high-voltage shop approvals. Mechanics must acquire entirely new proficiencies in electrical safety, cryogenic handling, and software-driven diagnostics to mitigate severe hazards like arc flashes and flammable gas leaks. Furthermore, facility infrastructure requires substantial upgrades, including roof-line gas detectors, climate-controlled storage, and heavy electrical service to handle increased utility demands. Ultimately, building early competency frameworks alongside original equipment manufacturers is essential for MROs to safely support next-generation fleets.