Great Lakes Sound and Vibration (GLSV) in Calumet recently celebrated the completion of an $8.5 million, 26,000-square-foot expansion. The project that was supported by a grant from the Michigan Strategic Fund, which was part of a $10 million private-public investment in the county’s defense manufacturers.
“We’re very grateful for the support from the community. You can see it in the attendance we have here today. Getting the legislators here. And we appreciate the chance to play a role in the growth of the community,” said GLSV CEO Steven Mattson.
GLSV creates solutions to insulate sound coming from the Navy’s ship engines. The company has also supplied the U.S. military with parts used in manufacturing of Humvees and tanks. Over the next five years GLSV will add another 32 employees and bring the team up to 100 full time workers in the copper country.
“The expansion behind us, area for working, gives us a lot of additional square footage underneath a heavier duty crane with more capacity to lift and more height to lift,” said Mattson. “So, our ability to do projects for the Navy, for instance, large projects, large hardware, and capacity has increased almost an order of magnitude for us. Our ability to do more work faster. Help solve the nation’s challenges in building ships.”
The Keweenaw Peninsula is home to a growing technology and manufacturing sector that works closely with branches in the military. Along with the $400,000 grant GLSV received in 2025, Loukus Technologies received $300,000. Mattson thanked several organizations and individuals for their assistance in completing the expansion, reserving special recognition for his employees who keep the ship running smoothly.