MOESK PAO, formerly Moskovskaya obyedinennaya elektrosetevaya kompaniya OAO (MOESK OAO or MOESK JSC), formerly Moskovskaya oblastnaya elektrosetevaya kompaniya OAO, is a Russia-based company mainly involved in the transmission and distribution of electric energy. Its other services comprise the design, building, development and reconstruction of electrical networks, connection to electrical networks and their maintenance. The Company is also engaged in provision of infrastructure for electric transport. MOESK OAO manages approximately 600 high voltage substations. The Company operates through several branches and wholly owned subsidiaries. It operates in the city of Moscow and the Moscow Region.