affiliate

Hello!
I'm drafting a formal certificate for the organization I work for, to certify our temporary staff's participation.
I was going to put "(staff) affiliated to Department A", while my dilemma is, affiliate intends to suggest that they're members of the organization, which on the contrary they're not. (They're temporary recruited for a special event.)
Hence I can't decide which expression to use here. affiliated/ subject to/ assigned/ subordinated, etc? What would you suggest? Which seems more appropriate to you? (and doesn't sound less formal)
Thanks a lot.

Does "attached" work for you?

I've also thought about that. It actually works here.
It's just, since most of them are not native speakers, and "attach" can mean a lot more, I'm a little concerned that they might misunderstand this expression...
Am my being so picky?

I don't think you're being picky -- like sdgraham, I thought about "attached," but it's one of several meanings and a term often associated with the military. And "assigned" works, but sounds less than wonderful, like being assigned latrine duty. Perhaps "staff associated with Department A." Or just "This certificate recognizes the work of Drew Barrymore as an associate in Department A." The entire statement would probably help us.

I think "associate" will do! Can't believe it eludes my mind earlier.
A thousand thanks to both of you! =)