The projects took place in the De Pere, D.C. Everest, Marathon, Abbotsford, and Waunakee school districts between 2003 and 2008.
Miron also agreed to change some of its accounting practices and operate with oversight from an independent monitor.
The U.S. Attorney's office on Wednesday announced a "non-prosecution" agreement that was signed in February with Miron officials.
The three-year agreement says neither Miron nor the two top executives who signed the pact admit or deny the allegations.
U.S. Attorney James Santelle says his office agreed to the deal in part to protect the Wisconsin company's workers. Miron employs about 1,200 people.
Miron says at issue was language contained in industry-standard contracts for projects completed between 2003 and 2008.