
Air America was an American passenger and cargo airline established in 1946 and covertly owned and operated by the Central Intelligence Agency (CIA) from 1950 to 1976. It supplied and supported covert operations in Southeast Asia during the Vietnam War, including providing support for drug smuggling in Laos.

Asgaard – German Security Group is a German private military company.

Columbia Helicopters, Incorporated (CHI) is an aircraft manufacturing and operator company based in Aurora, Oregon, United States. It is known for operating tandem rotor helicopters; in present times, exclusively the Boeing Vertol 107 and Boeing Vertol 234. These helicopters are used in stream restoration and forestry including heli-logging, aerial firefighting, oil exploration, construction, government support, film production, disaster response and many other activities. In addition the company operates a large FAA repair station supporting customers around the world.

DynCorp, formally DynCorp International, was an American private military contractor. Started as an aviation company, the company also provided flight operations support, training and mentoring, international development, intelligence training and support, contingency operations, security, and operations and maintenance of land vehicles. DynCorp received more than 96% of its more than $3 billion in annual revenue from the U.S. federal government. The corporate headquarters were in an unincorporated part of Fairfax County near Falls Church, Virginia, while the company's contracts were managed from its office at Alliance Airport in Fort Worth, Texas. DynCorp provided services for the U.S. military in several theaters, including Bolivia, Bosnia, Somalia, Angola, Haiti, Colombia, Kosovo and Kuwait. It also provided much of the security for Afghan president Hamid Karzai's presidential guard and trained much of the police forces of Iraq and Afghanistan. DynCorp was also hired to assist recovery in Louisiana and neighboring areas after Hurricane Katrina. The company held one contract on every round of competition since receiving the first Contract Field Teams contract in 1951.

Executive Outcomes is a private military company (PMC) founded in South Africa by Eeben Barlow, a former lieutenant-colonel of the South African Defence Force, in 1989. It later became part of the South African-based holding company Strategic Resource Corporation. The company was reestablished in 2021.

Joshua Olav Daniel Hodne French is a Norwegian-British man who was convicted of murder in the Democratic Republic of the Congo. He worked as a security contractor with his friend Tjostolv Moland when they were arrested in May 2009, and he was later convicted of attempted murder, armed robbery, the formation of a criminal association and espionage for Norway, of which he and Moland were found guilty and sentenced to death. In 2014 he was also convicted of the murder of Moland. He was released in 2017 after serving 8 years of his sentence, and returned to Norway.

KBR, Inc. is a U.S. based company operating in fields of science, technology and engineering. KBR works in various markets including aerospace, defense, industrial and intelligence. After Halliburton acquired Dresser Industries in 1998, Dresser's engineering subsidiary, the M. W. Kellogg Co., was merged with Halliburton's construction subsidiary, Brown & Root, to form Kellogg Brown & Root. KBR and its predecessors have received many contracts with the U.S. military including during World War II, the Vietnam War, and the Iraq War. Democratic Congressman Lyndon B. Johnson, later President of the United States, was instrumental in providing government contracts for Brown & Root, in exchange for the company funding his campaigns and otherwise providing money to him.

A mercenary, sometimes known as a soldier of fortune, is a private individual, particularly a soldier, who takes part in military conflict for personal profit, is otherwise an outsider to the conflict, and is not a member of any other official military. Mercenaries fight for money or other forms of payment rather than for political interests. Beginning in the 20th century, mercenaries have increasingly come to be seen as less entitled to protections by rules of war than non-mercenaries. The Geneva Conventions declare that mercenaries are not recognized as legitimate combatants and do not have to be granted the same legal protections as captured service personnel of a regular army. In practice, whether or not a person is a mercenary may be a matter of degree, as financial and political interests may overlap.

Michael-Bruno, LLC is an American architectural design, engineering service and construction management firm. The company is headquartered in Wilmington, Delaware, with operations in Europe, Africa, and the Middle East. Founded in 2003, they run multiple overseas operations. Michael-Bruno, LLC has won multiple contracts with NATO and the U.S. military, including the Navy.

MVM is a company headquartered in Ashburn, Virginia, United States. It is a private security contractor that provides security contractors, staffing, training, translation and related services to U.S. Government clients including being a contractor for detaining children who are subject to immigration proceedings.

The Private Security Company Association of Iraq (PSCAI) was a not-for-profit organization formed and maintained to discuss and address matters of mutual interest and concern to the industry conducting private security functions in Iraq. The PSCAI worked closely with the Iraqi Government, Coalition Provisional Authority and Coalition forces to promote transparency, legitimacy, and accountability for the private security company industry. The PSCAI was dissolved on December 31, 2011.

Sandline International was a private military company (PMC) based in London, established in the early 1990s. It was involved in conflicts in Papua New Guinea in 1997 and had a contract with the government under then-Prime Minister Julius Chan, causing the Sandline affair. In 1998 in Sierra Leone Sandline 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. Sandline ceased all operations on 16 April 2004.

Triple Canopy, Inc., is an American private security company that provides integrated security, mission support and risk management services to corporate, government and nonprofit clients. The firm was founded in May 2003 by Army Special Forces veterans, including former Delta Force operators. In June 2014, the firm merged with rival security contracting firm Academi, formerly Blackwater, to form Constellis Group, with Craig Nixon, the former CEO of Academi, becoming the CEO of Constellis Group, and training facilities being consolidated at the existing Academi training facility in North Carolina. It was staffed by, among others, a number of former Army Special Operations personnel, Green Berets, Rangers, SEALs, MARSOC Critical Skills Operators, other special operations personnel, and several law enforcement officers. At the time of the merger, over 5,000 employees were working for Triple Canopy.

The Turan Group is a fake Muslim Russian private military company in Syria. For unknown reasons, the existence of Turan was fabricated by a Russian journalist and others through staged photographs and Photoshop. It is described as a hoax.

Unity Resources Group is an American-owned private security company headquartered in Los Angeles, USA.

Chatham Roberdeau Wheat was a captain in the United States Army Volunteers during the Mexican War, Louisiana State Representative, lawyer, mercenary in Cuba, Mexico, and Italy, adventurer, and major in the Confederate States Army during the American Civil War.