Slovenské energetické strojárne a.s. (SES) is a Slovakia-based joint-stock company primarily engaged in the design, manufacture and assembly of power engineering equipment.

The Company provides boilers for combustion of coal, oil, gas and biomass and determined for thermal power plants or combined heating and power plants as well as incinerating plants. In addition to equipment for power engineering, the Company produces equipment for the oil, gas, metallurgy and consumer goods industry. It also provides services in power engineering: development, designing, manufacture, assembly and commissioning. Its products are divided in five segments: power plants; boilers; condensers, heat exchangers and pipelines; steel constructions and other equipment.

It is operational through a number of subsidiaries, including SES Hungaria Kft., based in Hungary, SES Bohemia sro, based in the Czech Republic and SES Chile, based in Chile, among others.