Companies like General Electric, Honeywell, Eaton, Seimens recruit power electronics engineers mostly in R&D. You have to keep track of their off campus placements .
Government sector jobs like BHEL, Indian Railways, Indian Armed Force, HAL, BSNL, State wise Electricity Board, DRDO, Thermal Power Plants are prime recruiters.
Electrical goods manufacturing, telecommunications sector, Industries involved in production and manufacturing, energy sector etc. Are the prime recruiters, when it comes to private sector enterprises.
You can also gor for teaching profession, or going for PhD will be good.