Can I pursue Ph.D. in management from IIM? I have done integrated degree B.Tech+MBA and currently working in an MNC as PDT manager.

Yes, although IIMs are currently societies, they are unable to offer a formal doctorate, but there exists an FPM (Fellow Programme). This is analogous to the relation between PGP and MBA. It is well-regarded in India and outside as well. And, you will be able to get the best jobs and academic posi