Ph.D

If your PGDM degree is approved by AIU as equivalent to MBA then you are eligible for appearing in UGC NET or doing Ph.D.

On completion of Ph.D you can use Dr. in front of your name. But you can not become a medical doctor and practice medical profession.

MBA and PGDM are equivalent course. Why do you want to do PGDM after MBA. It is recommended that you opt for PhD if you to study further in the field of Management.

Hi
Shortlist the universities to which you wish to apply. They do look for work experience but if you have certain publications or researches, you do have a chance of getting admission. Here is the link to help you further.

A Ph.d is generally done to take up a job in research or education and with civil engineering, ppl pursue MBA in construction management as there is a need of well trained professional in it. Other good options are Transportation Engineering, Structural Engineering, Water Resource Engineering, Geo-Technical engineering, Environmental Engineering etc.

You can do PhD in management by distance learning from IGNOU or AIMA-AMU.

Fellowship program of legacy IIMs which is equivalent to PhD is the best option for doing PhD in Management or Commerce. You may also evaluate FMS Delhi University for same .