Hello Arnab,

After doing Masters in public administration there are much more career options. You need not to worry. You can study further. You can do Phd in it.
Here I'm sharing some job roles which goes with this subject.

Tax examiner.

Budget analyst.

Public Administration Consultant.

City Manager.

Mayor.

International aid/development worker.

Fundraising manager.

Except the above information on successful completion of Masters degree in Public Administration, a student can apply for theUGC-NETor JRF exam; the success in these exams makes teaching or research as good options.

The greatest scope after doing M.A. Public Administration is that it not only makes you eligible but also gives you a fairly better chance to qualify the Indian Civil Services exams but also many other options.

Hope it helps
All the best!

An MPA degree is similar to an MBA but deals with issues of governance. This degree is not common as compared to MBA, so career opportunities are limited. You will get to work with government or NGOs in the public domain and will be responsible for handling public welfare affairs. Here are a few posts in this domain:

• City or County Manager.
• Local Government Administrator.
• Policy Analyst.
• Charity or Foundation Manager or Director.
• Budget Director.
• Association or Nonprofit Executive.
• Economic or Business Development Director.

Opt for this course if you are interested in working for public rather than corporates. 

Wish you all the best.