"This new site will support operations in the design and manufacturing of power technology systems, and is expected to be operational within two years to serve customers in commercial and defence markets," the release said.
The release provided few details, however, the term "power technology systems" typically refers to equipment to generate and store electricity.
Raytheon, a leading US defence contractor, employs 1,700 people and supports 9,000 jobs in the UK, including 700 workers at an existing factory, the release said.
The new factory in the town of Livingston will provide Raytheon with a second, state-of-the-art high-technology manufacturing facility in Scotland, according to the release.