Contractors

A private military company (PMC) provides specialized expertise or services of a military nature, sometimes called or classified as mercenary ("soldiers for hire"). such companies are equally known as Private Military Contractors, Private Security Contractors (PSCs), Private Military Corporations, Private Military Firms, Military Service Providers, and generally as the Private Military Industry.
The services and expertise cover those typically found in governmental military or police forces, but most often on a smaller scale. While PMCs often provide services to train or supplement official armed forces in service of governments, they are also employed by private firms. However, contractors who use offensive force in a war zone could be considered unlawful combatants, thereby referring to the "concept" being implicitly mentioned in the Geneva Convention and explicitly specified by the Military Commissions Act.
Private military companies supply bodyguards for the Afghan president and pilot armed reconnaissance planes and helicopter gunships to destroy Coca crops in Colombia.They are licensed by the State Department, they are contracting with foreign governments, training soldiers and reorganizing militaries in Nigeria, Bulgaria, Taiwan, and Equatorial Guinea. The PMC industry is now worth over $100 billion a year
PMCs are also known as security contractors, although this term usually refers to individuals employed or contracted by PMCs. Services are mainly rendered for other business corporations, international and non-governmental organizations, and state forces.Private military companies are sometimes grouped into the general category of defense contractors. However, most defense contractors supply specialized hardware and perhaps also personnel to support and service that hardware, whereas PMCs supply personnel with specialized operational and tactical skills, which often include combat experience.