if you like some examples then,
You could design it many ways, one way could be,
1. Create an Organization unit say Service Team,
2. Create a Service_manager uid, or make any one of the Service Team member that.
If you have all Linux/Unix system, then you could have POSIX group called "ServiceTeam",
The ACL will look like this.
aci: ((target="ldaps:///ou=Service Team,dc=example,dc=com) version 3.0; acl "Support Manager"; allow (all) userdn="ldaps:///uid=support_manager,ou=people,dc=example,dc=come";)
Basically aforesaid ACI stating, if you login as uid=support_manager, you have allow(all) access to Service Team Organization unit.
I would recommend to use GUI and copy paste the ACI, because GUI does not allow all kind of ACIs.
Thanks,