dear aspirant, as per the data collecetd by me on the web some PSU's recruiting throught GATE having age limit more than 30 years are:-

1.NLC  2.PSPCL  3.cabinet secretriat  4.HAL  5.NHPC . 

all the age age limit is for general category students.for OBC-NCL category there is an age relaxation of 3 years and for SC/ST age relaxation is 5 years.

NOTE:- the above data is 4-5 months old, changes can be possible in data.

Hello

The different PSUs recruiting through GATE and the age limit for general candidate is given below:

BPCL- 25 Years

ONGC- 28/30 Years

MDL- 26 Years

GAIL- 28 Years

IOCL- 26 Years

OIL- 27 Years

PGCIL- 28 Years

HPCL- 25 Years

NLC- 30 Years

NTPC- 27 Years

WBSEDCL- 27 Years

NBCC- 29 Years

CEL- 27 Years

BHEL- 27 Years

PSPCL- 37 Years

NFL- 27 Years

Cabinet Secretariat- 35 Years

HAL- 37 Years

NHPC- 30 Years

BBNL- 28 Years

BSNL JTO- 28 Years

OBC candidates would get age relaxation of 3 years and SC/ST Candidates would get age relaxation would get 5 years.