As you have asked about the vacancies in Power Grid Corporation of India Limited, I am giving you information about it, I have found following information

Recruitment for the post of Engineer (for Telecom functions), Assistant
Officer (Accounts) and Assistant Officer Trainee (Company Secretary) - Advt.
No. CC/04/2016 dtd. 30.04.2016

Recruitment of Executive Trainee - HR, Environment Mgt., Social Mgt. and
Assistant Officer Trainee- PR through UGC- NET-July 2016 - Advt. No.
CC/03/2016 dtd. 19.04.2016

Recruitment of Executive Trainee (Law) through CLAT-2016 (for LLM/PG) -
Advt. No. CC/02/2016 dtd. 08.03.2016

Recruitment of Vigilance Executives (CC/01/2016)

Recruitment for Dy. Mgr. (Finance & Accounts) and Officer (Company
Secretary)

Recruitment of ET 21st Batch through GATE 2016 in Electrical, Electronics,
Civil and Computer Science Disciplines (Advt. No. CC/05/2015 dtd.
15.09.2015)


To know more about it
Go to Power grid website
Place cursor on Careers
Click on job opportunities, the page open look like



Here you will get the information about the vacancies.