Compass is still headquartered in Chantilly VA (at least as of two days ago when I talked on the phone with somebody there...). I didn't get any indication that they were going to up and move their offices over the last two days, especially given the fact that they fall under the scope of the IAD FSDO and are right in the final stages of certification...
They might be setting up to do interviews in Eagan since it will be easier/cheaper to fly people on NWA to that location than to IAD. Especially given the changes that I have heard about their interview process.