MS AD certification and experience for a role in my project

I would like some help with defining the required Microsoft Active Directory certification and experience for a role in one of my projects.

We require two roles, a manager and senior associate:
The manager is responsible for overseeing day-to-day activities of the senior associate, some architecture knowledge (specifically for microsoft) is also great. The Manager is also responsible for interacting with other stakeholders for required implementation and integration (for example, if a new agent needs to be installed on the domain controller or distributed to the environment, sending DC logs to a syslog...etc)

The senior associate will be the executor as per the manager's assignments.

Can someone please help me by suggesting what certification should I be requiring for both roles, years of experience and other skills (like PowerShell ...etc)