Without giving away too much details but still enough to get help:
Recently I was on TDY with Army, Marines, Navy in Washington State. In total was approximately 38 members that were part of this operation, but I worked directly with 18 members (6 Air Force, 2 Marines, 10 Navy). Myself and a Navy member were the highest rank (E-6) between the 18 we directly worked with. Nobody knew each other prior to this TDY (3 weeks).
Everyone there was an absolute legend. They needed little to no supervision, and assisted the home unit (mostly civilian) in the operation we were on. Everyone impressed, at least two letters by permanent civilians sent to me praising the team.
I have the numbers for bullets but wont get into those details here.
What can I do, to give them credit for work accomplishments, but more importantly adding something to their file that will help them when it comes time to promote, etc. Is there any award that can be given, a letter I can write to their command, that will have an impact beyond being just a piece of paper with no PIF value? Anything I can petition to have added to their PIF. At my level can I write a letter of appreciation that will have any value?
I would feel terrible if there was nothing I could do for them beyond an email saying thank you. I am NOT well versed in this sort of thing. The POC and NCOIC have not been helpful in this quest.