List of PSUs recruiting through GATE 2014. HPCL – Graduate Engineers. NHPC – Trainee Engineers. Powergrid – Executive Trainee. Complete List of Public Sector Undertakings recruiting through GATE are HPCL, NHPC, National Fertilizers Ltd, Neyveli Lignite Corporation, Powergrid, GAIL India Ltd, Central Electronics Ltd Recruitment and Mazagon Dock Ltd