This article considers the main directions of the activities of Western private military companies (PMCs) in the post-Soviet space. The end of the USSR and the Warsaw Pact led to the creation of an extensive arms market. The collapse of the Soviet army and the prolonged economic crisis frustrated a large number of former military personnel and made them ready to offer their professional skills to almost any solvent customer. The decay of the bipolar system of international relations has created vast zones of instability, mostly localized in Africa, the Balkans, and in the Middle East. The military security function no longer prevails in the largest Western PMCs. These corporations have significantly diversified their activities, thoughtfully excluded the word “military” from their names, and today provide customers with a wide range of services from cargo transportation and consulting to construction and geological exploration. Unlike Iraq and Afghanistan, the post-Soviet space does not provide Western PMCs with any broad field for participation in peacekeeping and counter-terrorism operations. Their contribution to the combat training of the armed forces of Georgia, Ukraine and Azerbaijan was limited to only a few episodes. However, the gradual penetration of Chinese military companies into the Central Asian region has become a fundamentally new phenomenon.