Wärtsilä is a Finnish corporation which manufactures and services power sources and other equipment in the marine and energy markets. The core products of Wärtsilä include large combustion engines. Wärtsilä sees the growth in smart power market, oil and gas industry, lifecycle solutions and in environmental solutions. The company employed 17,913 workers in more than 70 countries at the end of 2011, and its headquarters are located in Helsinki.

In 2011, Wärtsilä’s net sales totalled EUR 4.2 billion with approximately 18,000 employees. The company has operations in nearly 170 locations in 70 countries around the world. Wärtsilä is listed on the NASDAQ OMX in Helsinki, Finland.

Wärtsilä powers one in three ships and services one in two ships sailing the world's seas.

The company services the merchant, offshore, cruise & ferry, naval, and special vessel markets globally, and the offering includes ship design, main and auxiliary engines, auxiliary power systems, electrical and automation packages, propulsors (such as water jets, thrusters, propellers and nozzles), seals, bearings, gears, rudders, scrubbers, boilers and all related services, such as repair, configuration, upgrading, training, maintenance and environmental services.