As you say that you have completed Diploma in E&C with 74%. There are many job opportunities in Government and Private sectors after completed Diploma in E&C. But because you are only diploma holder you can job in some small companies.

List of some organization where you can apply for job:

BSNL
Airtel
Idea
Reliance
Vodafone
Aircel
Docomo
Tata Indicom
Virgin India
Nokia India
IBM
HP
Oracle
Ashbee
Avadh Exports
Bionics
Continental Device
Deltron
Envoys Electronics
Genesis Forte Tech
Hitachi Trading
Maniktala
Pagaria Electronics
Salora
Star Antenna
OVM Group
Prosem Technology India Pvt Ltd
True Power International Ltd

Eligibility:

The applicant must have minimum of 60% in your Diploma without any backlogs.

The applicant’s age must be in between 21 to 30 years.

The applicant must have Good Communication skills.