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Trusted Experience. Unparalleled Performance.

In 1989, David Grilli and Bob Joy purchased the magnetic shielding division of the Gloucester, Massachusetts company BOMCO. David and Bob had experience running the division as the magnetic shielding applications engineer and plant operations manager (respectively) and were now the principal owners of the newly formed MuShield Company. Eventually, David and Bob moved the company to Goffstown, New Hampshire, and within 10 years, had turned the five-person business into a successful 20+ person magnetic shielding solutions and precision metal forming shop.

By the early 2000s, MuShield saw incredible company growth and outgrew their Goffstown building. In 2004, MuShield purchased a 19,000 sq. ft. building in Londonderry, New Hampshire. This additional plant space enabled the company to invest in larger machines such as an IPG LaserCube, Cincinnati Hydroform, Trumpf 5 Axis laser, Multi Axis Hurco Milling Center and a second hydrogen furnace (among other machines). The increase in floor space led to increased work capacity and allowed for MuShield to become more involved with larger and more diverse magnetic shielding applications.

Since the company’s inception, David and Bob have welcomed their sons Luke Grilli and Brett Joy into management roles. Following in their fathers’ footsteps, MuShield is a true family business.

MuShield and its principals have been an industry leader in magnetic shielding solutions for 40+ years and will continue and build on their tradition of success for decades to come.

MuShield was the first in the magnetic shielding industry to be ISO 9001 certified more than 10 years ago. With our latest ISO9001:2015 and AS9100D certifications, MuShield’s manufacturing operations are reliable, repeatable, and efficient.

MuShield's Quality Engineering provides: