If you don't know where to start you could create your own ANN thread (bounty management) on the
Services section.
I'm not a bounty manager but with a quick observation you'll notice that most bounty managers have past experiences and those who are new either have a decent reputation here in the forum or team member of a project.
Thank you for this information. I thought that I found a bounty management team and worked with them. Because I think bounty campaign is managed by team better than individual. It seems that is hard to join the major bounty teams now.