PMC since 1999

The USEC private military company was established in 1999 after the merger of two companies: KerniSEC and Safe Sea. In 2004, an agent of Terra Group international holding made contact with USEC, which have consecutively become, essentially, a private army of the holding, with offices all around the world and over 7500 strong of staff. Over the Contract Wars, the offshore-established PMC employed by Terra Group Labs as a security subcontractor was attempting to destroy the evidence of any potentially illicit activity of the employer and protect its property from being captured by BEAR, the PMC hired by the Russian government to investigate the Terra Group operations.

USEC wiki[escapefromtarkov.gamepedia.com]