there's no such places where you can apply as bounty manager because ICOs and Crypto developers have bounty managers already as part of their future plans and road maps.
there are already more bounty managers in this forum but I don't think good ICOs or good projects are hiring new bounty managers except the veterans like Sylon, Needmoney, Arteezy etc.
Bounty hunters won't trust new managers as well especially Lowe ranked members.