Datacenters certainly provide many construction jobs during that phase of the project.

During normal operations though, you would have a handful of technicians, probably a facilities manager and frequent contractor visits, probably onsite security.

The facilities contractors may come from far away for maintenance projects, so maybe you help support local hospitality businesses.

Most of the highly paid work at the datacenter will happen remotely.

Every so often, there will be a hardware refresh, but you probably bring in people from elsewhere to do those, if it doesn't make sense to have the onsite techs do it little by little.

Certainly, there's a lot of equipment installed, and any locality with property tax on business equipment should get value from that. But otherwise, almost any other light industrial business would have more employees.