publicist

noun3

1. •
   A person whose job is to publicize information or events; a publicity agent; a public relations agent or worker.

   • Legendary soul singer Bobby Womack died Friday, Womack’s publicist said. He was 70. — 2014
2. •
   A journalist, often a commentator, who focusses on politics.
3. •
   (no longer used) A scholar, of public or international law.