HAL Jobs Recruitment 2021 MO Posts. HAL Jobs Recruitment 2021 | Medical Officer, Sr Medical Officer posts | Walk in : 08-05-2021. HINDUSTAN AERONAUTICS LIMITED (HAL), a Navaratna Company, is a Premier Aeronautical Industry of South Asia, with 19 Production Divisions and 10 R&D Centres spread across the Country. HAL’s spectrum of expertise encompasses design,