I'm guessing you mean like
http://www.pejn.com and the like, where you have a specific place for employers and jobseekers alike that are looking for expertise or work with a certain platform.
I'd say this forum would count... maybe add another forum section just for the purpose?
Of course, Alibre being so easy to pick up, having Alibre-specific experience may not be as advantageous as having good general solid modeling skills. I can understand needing to find someone with 5000 hours of Catia experience, but anyone with any 3-D CAD under their belt would do just fine picking up Alibre.
My $0.03, anyways. (I'm Canadian, I have to account for the exchange rate.)