4M Sigma

We are a veteran-owned, small business having resided at this location since 1990. All design, electrical/electronic fabrication, assembly, calibration, and functional test are performed at Interbay. We also currently use 15 Boeing D1-4426-approved and mil-spec approved specialty processors within a 20-mile radius of Interbay. These sub-contractors have been carefully audited and selected by our Operations Management. All outside process work is consistently monitored via on-site visits and facility inspections. Approximately 175 piece part and raw material manufacturers & distributers round out our supply chain.

1900 W Emerson Pl
206.285.9181
Business type:

Mantec Services Inc

Mantec Services is an experienced contract manufacturing company, providing proprietary safety bumper and protection products and customized manufacturing services. Mantec offers engineering expertise and single-sourced project management solutions for the electronic, metal fabrication, casting, and composites industries.

We are a family-owned business located in the Seattle area supported by a dedicated and professional staff committed to meeting the needs of our clients by providing exceptional customer service. Mantec manufacturers exclusively within the United States.

4400 24th Ave W
206.285.5656
Business type: