Virginia has statewide preemption. IANAL, but it would seem to me that the worst you would have to deal with would be illegal harassment. They couldn't throw anything real at you. The real deal would be checking with your company to see if they have any restrictions.
Correct me if I misunderstood your question.
EDIT: Uh... do you mean you install locks in Federal Buildings and/or Courthouses? Because that would be a problem.