Thats legit so obvious, who in their right mind who have more than one person have a job that only allows one person to use it at a time.
That's just how you guys are running Ghost Company, that doesn't mean its a server rule or something that Ghost Company Leaders are required to be ARC trained. Who knows, maybe the next BCMD may change that requirement that all GCL have to be ARC trained, there's nothing stopping that possibility. But that doesn't mean it is an ARC job. That's just how you structure your battalion and the requirements for certain positions.