We were hired as a Subcontractor to provide material and labor for CCTV surveillance at the entrance to the AFB in town and they still owe us $33,000.00. It's been about a year since the job was complete and originally I allowed then to make payments but they have since stop those payments and don't return my messages.
I've learned alot from this and won't make the same mistake twice. The customer does most of it's work for DoD and I just want them to know that they didnt pay their Subcontractor.
I agree with Tony. I'll also add that threatening to act as a whistleblower under the False Claims Act might lead to payment or at least convince the customer to pick up the phone. If a government contractor knowlingly submits a false claim for payment or if they make a false statement inducing the government to pay them (like claiming they've paid/are paying their subs and suppliers), the government contractor could quickly find themselves in hot water.
Levelset discusses the False Claims Act and how it can apply to federal construction projects here: The False Claims Act: What Construction Businesses Need to Know.