Give me name of some best core companies are situated in India that offer better job opportunities for Electronics and Communication engineering ?

Here I am giving you name of some best core companies are situated in India that offer better job opportunities for Electronics and Communication engineering .

ISRO(Indian Space and Research Organisation)
SAIL(Steel Authority of India)
BHEL(Bharat Heavy Electronics Limited)
NTPC(National Thermal Power Corporation)
BSNL(Bharat Sanchar Nigam Limited)
BEL (Bharat Electronics Limited)
ONGC(Oil and Natural Gas Corporation)
BARC(Bhabha Atomic Research Centre)
IOCL(Indian Oil Corporation Limited)
PGCIL(Power Grid Corporation of India Limited)
CIL(Coal India Limited)
NHPC(National Hydel Power Corporation)
DRDO(Defence Research and Development Organisation)
Gas authority of india limited
Hindusthan petroleum corporation limited
National thermal power corporation
Larsen & toubro
Tata motors
Hindusthan aeronautics limited