Ya there's a lot of scope for the sub philosophy in UGC Universities & abroad also but you have to carry on regular/continous study/ research after PhD also.Jay Hind

(B) Epistemological problems or the problems of the theory of knowledge.Within the scope of the epistemological philosophy come the questions on the origin and the nature of knowledge, its possibilities and limits and method of acquiring knowledge and the scope and validity of knowledge.

Thanks,
Azim