Hello Rajesh, normally in these circumstances if you are going for full time 2 year LLM program with on-campus requirements, you would require a sabbatical leave from your department or employer. As per high court ruling, officials can be granted permission to pursue full-time LLB/LLM courses by their superior. So once you get the application granted, you can easily pursue LLM or PhD (Legal) in your desired college. However, if your course is a long distance program, you can very well continue working in your respective office while parallely studying your course as an open student.