About Us

Present, 2021

Sigma Security Group, LLC is a private military company (PMC) based in Jeffersonville, Indiana, established in the early 1980s. It was involved in conflicts in the mid-1980s in various locations in the Middle East, as well as Papua New Guinea in 1997, and had a contract with the government under then-Prime Minister Julius Chan. In 1998 in Sierra Leone, Sigma had a contract with ousted President Kabbah and in Liberia in 2003 was involved in a rebel attempt to evict the then-president Charles Taylor near the end of the civil war. Sigma currently maintains a roster of approximately 500 contractors from military and civilian backgrounds and is active domestically and internationally, accepting private and government contracts.

Sigma was founded and managed by retired MACV-SOG team leader John Cooper. Sigma bills itself as a PMC and offers military training, "operational support" such as equipment and arms procurement, and limited direct military activity, intelligence gathering, and public relations services to governments and corporations. While the mass media often refers to Sigma as a mercenary company, the company's founders dispute that characterization. A commercial adviser for Sigma once told the BBC that the firm saw themselves differently from mercenaries, stating that they were an established entity with “established sets of principles” and that they employed professional people. He reiterated that the firm would not accept contracts from groups or governments that would jeopardize its reputation.