What can a senior officer do if they are being harassed by a civilian government employee?

MAJ (Join to see) Document all interactions. Build a case for toxic work environment. Escalate through organization chain of command, and document, document, document. Good luck.

Office of the EEO

Treat it similar as you would anyone else in the Command. Civilian Gov Employees are expected to act just as civil and responsible as anyone else. They also have a rank and are expected to act accordingly. I started out as a GS in a Military Command and there are more similarities than differences. Report it up the chain to your leadership and you should also have an EO or HR office you can utilize. If this is a personal beef I would go that route. If it is more an issue with customer service from this individual or their shop/division/section you could also use a customer service/QA or employee advocacy office if you have one. If the Command or leadership already completed action on it there should be quick action to resolve and mediate.