NPO Energomash is a Russian manufacturer, which focuses primarily on the development and production of liquid propellant rocket engines.
NPO Energomash is based in Khimki, Moscow state, with satellite facilities in Samara, Perm, and St. Petersburg, and employs close to 5500 workers. Originally founded in 1946 as OKB-456, the company is noted for its long history of large scale LOX/Kerosene engine development, notably the RD-107, RD-170, and RD-180 engines, as well as UDMH/N2O4 engines RD-253 and RD-275 used on the Proton rockets. These engines have functioned as prime movers for such vehicles as R-7, Proton, Soyuz, Energia, Zenit and Atlas V.
NPO Energomash acquired its current name on May 15, 1991, in honor of its chief designer.