Hindustan Aeronautics Limited HAL Jobs Recruitment 2020. Hindustan Aeronautics Limited (HAL), a Navaratna Central Public Sector undertaking, is a premier Aeronautical Industry of South East Asia, with 20 Production/Overhaul/Service Divisions and 11 co-located R&D Canters spread across the Country. HAL’S spectrum of expertise encompasses Design. Development, Manufacture. Repair, Overhaul and upgrade of Aircraft, Helicopters. Aero-Engines,