A bit of necroposting here, but just to get this on a Google Search, which is how I found this thread. (I am in no way an attorney, go get an attorney and maybe this post helps someone)
Protective Orders are reported to the FBI under its administration of the National Crime Information Center registry. Several laws require this reporting. Yes, the employer will know about the order if they look. Worse, Customs and Border enforcement is notified as is the FAA. The government agencies will look. Expect to meet a few extra Officers at your next border crossing.
There are specific codes for Ex-Parte (a legal term meaning the Order was granted on just one person's allegation with no hearing) Protective Orders. These are supposed to be updated to show the disposition of the Order. Here is the training the FBI receives (which also came up via a Google search):
https://www.bwjp.org/assets/document...fc-webinar.pdf
TPOs are getting thrown around for any and everything these days. Too easy to get with zero accountability.