As a GS, I've found that if you push back managers almost always back off. I've filed complaints and while it may feel like you're marked to be passed over etc. the reality is you're marked as the guy they don't want to f*ck with.
My command has been great, but I work under a civ + mil department head and a real chain of command. I've found orgs with legit mil department heads not only treat their civ guys well, you get a bit more leeway being a commissioned reservist.
I do know some folks who work for a DoD org up in Maryland that is almost entirely civ ran except for a token mil department head (O-6 billet) and they're quite toxic. It seems the difference is if you've got actual mil leadership or its a bunch of civ's who most likely never served outside of their GS desk riding.
My old boss was convinced that he warranted the same customs and courtesies of an O-6 because he was a GS-15. He never spent a day in uniform but somehow thought he was equal to the O-6 in the front office.
I wish a GS-15 would pull that with me, I'd go right to his/her mil counterpart make sure they were educated. No GS can give a military member a lawful order. That's why .. well from my 10ish years as a GS I've always had civilian supervisors with military counterparts who had the final say.
One last thing ..
As a GS the "proper" route would be to go to your supervisor, you need to re-organize your DPMAP elements etc to facilitate proper job performance and your reserve duties. If you're meeting your DPMAP elements then they can't do a single thing. If you need to re-write them do so and remember to give yourself leeway. Don't put down 99.9% of "Metric A", go for 90% instead so you've built in some realistic leeway.
If your supervisor is the one giving you trouble, you'd want to reach out to HR for arbitration, you can also check TWMS and see if you have a bargaining unit. The union would eat this stuff up! Just be sure to save emails, if you have a trustworthy co-worker just email them the results or any meetings etc. Then print them out - those are now official government documents.
Finally if your region HR won't help and the union isn't responding your main go-to is OPM. They have the absolute final say and more then likely there is some small gov agency just below OPM they'll refer you to who... will quickly remedy any issues. For example I had an issue with my PD's grading, went through the chain up to OPM who referred me to a DoD office who's only job is to review PD grading issues I had never heard of. Within a week my PD was re-graded at the correct level.
Once the dust settles as aforementioned you'll simply be the guy management knows never to f*ck with.
