Magistrate

Noun

1. A judicial officer with limited authority to administer and enforce the law. A magistrate's court may have jurisdiction in civil or criminal cases, or both.
2. A high official of the state or a municipality in ancient Greece or Rome.
3. A comparable official in medieval or modern institutions.

   "Like other civil servants, Ashok Kumar started his career as an Assistant Collector cum Sub-divisional Magistrate."

4. A master's degree.