Not sure how a job change is approached in India as far as expats are concerned. I think there is a 6 month no compete clause in most contracts for expats in India. If you leave a carrier you must wait 6 months to join another. As far as the NOC (no objection certificate) I guess you can approach the carrier you wish to apply with. The Indian civil aviation market is still a relatively small one. I can bet you that most checkpilots and management pilots know each other from the military or previous airlines. We lots of ex Air Sahara, Jet, etc etc guys. As they say have your people call their people and see what happens. As long as you have a good record and reputation at your current place there should be no problem getting a NOC I would think. Ofcourse, you would have to go elsewhere for 6 months to comply with the contract.