There are a surprising amount of Top Secret facilities and offices, surprisingly, right here in River City, revealed by a Washington Post investigative series. Now, the Feds aren't talking about their TS-ness, but there were multiple Top Secret contractors found nearby:
iMove, in Portland
Jive Software, in Portland
PLEXSYS Interface Products, in Camas WA
S&D Eng. Sol., in Lake Oswego
Talent Scout Assoc., in Stayton
Thetus, in Portland