Dear aspirant , 

Yes it is possible for you to get good PSU as you have MTECH degree from IIT which is the best achievement for an engineering student . The salary will vary from person to person , as it depends upon what knowledge you have for the job which you will apply for . The package can vary from 5 LAKHS TO 12 and may be upto 18 LAKHS PER ANNUM.  PSUs also give you nice increment in salary after like 1 or 2 years.