You must be able to demonstrate that you are experienced.
I would like to hire someone who has the following experience.
1. Setting up and configuring of bulk dedicated and VPS email servers
2. Configure multiple threads and multiple rotating IP address / proxies
3. Setup and configure software example Interspire or Mailer King
4. Setup and configure DNS, DKIM, Postfix ......
And the final step will be to maintain servers making sure they are UP and running 24/7
This role is on going and I expect that there will be 10-20 hours per week.