Why Spirent Federal? Spirent Federal Systems Inc. is the leading provider of positioning, navigation, and timing (PNT) test equipment to the U.S. Government and prime contractors. When you choose Spirent Federal as your test partner, you will work with some of the most passionate and knowledgeable subject matter experts in the industry. We have the soul of a startup—a non-bureaucratic , innovative working environment—but because of the independent proxy relationship with our parent, we also have the resources and support of a large corporation. We embrace a culture where differences are valued, and mutual respect, collaboration, and fairness are fundamental.