MARQUETTE — Great Lakes Sound and Vibration has completed the expansion at its Calumet facility, adding 26,000 square feet and increasing capacity for large-scale defense manufacturing work.

Supported in part by the Michigan Economic Development Corporation’s Michigan Strategic Fund grant awarded in 2025, the project was part of a broader $10 million public-private investment tied to Houghton County defense manufacturers.

The added space will allow GLSV to take on larger U.S. Navy-related projects and move work faster, with plans to add 32 employees over the next five years. This expansion will also help keep the Keweenaw’s growing role in advanced manufacturing tied to national defense moving forward.