From Halopedia, the Halo wiki
During the Human-Covenant War, it manufactured the MJOLNIR Rogue armor. However, after Tribute was destroyed in 2552, production of the armor was taken over by Hannibal Weapon Systems in 2555. By 2558, they manufactured the VIPER-class Mjolnir.
The company had facilities in the following cities and locations:
List of appearances