Integrated Manufacturing Solutions
That Drive Value
Improve Product Quality Enhance Functionality Reduce Costs Speed Up Cycle Times
We Excel at the Most Demanding Projects Complex assemblies Large components Precision tolerances Multiple Processes Complete OEM services ITAR Registered An 80-Year Track Record of Success Aerospace & Defense Medical Equipment Robotics Cable Handling Systems Semiconductor Equipment

Welcome to Granite State Manufacturing!

GSM, your strategic small business partner for complex manufacturing, is a leading provider of integrated manufacturing solutions with over 80 years of experience.

Concept-to-Product Manufacturing Solutions

GSM provides end-to-end manufacturing services that meet the demanding standards of the aerospace, defense, medical equipment, and other industries.

As a small business, we partner with our customers to achieve extraordinary outcomes, improving product quality and functionality and reducing cost and cycle times.

Critical equipment made here at GSM is on every US submarine in the fleet.

Our staff includes expert Program Managers, Project Engineers, Procurement Specialists, Manufacturing Engineers and Production Control personnel.  Our Visual Manufacturing System and CAD-CAM capabilities provide best-in-class service.


  • Design for manufacturing
  • Program management
  • Value engineering
  • Fabrication
  • Assembly
  • Welding
  • Painting
  • Testing
  • Packaging & finishing

Why Choose GSM?

We are experts at jobs that require multiple manufacturing processes, complex assemblies, and high tolerances. We also excel at manufacturing sophisticated products that include moving parts, electromechanical systems, and even robotics. With our staff’s wide range of skills and expertise combined with our full suite of manufacturing equipment, we meet the highest standards for the most challenging projects.

More than just a contract manufacturer, we provide value engineering, design for manufacturability, program management, and other value-added services. We can help you reduce product cost, increase throughput, and avoid costly mistakes. We take pride in partnering with our customers to make a lasting, positive impact.

For over 80 years, we have served some of the world’s top companies in defense, aerospace, medical equipment, semiconductors, and other industries. We have deep product experience in robotics, cable handling systems, industrial equipment, medical diagnostic equipment, among others. We can manage a product from concept to design to sourcing to full production.
We are ISO9001 and AS9100 certified. We also have certifications for soldering, welding and painting. Top companies in the most demanding industries count on GSM to deliver product on time, on budget and to the highest quality standards.


  • Thanks to you and your team for your efforts on the advanced unit. We asked a lot of you, and really challenged you to produce under great schedule pressure. It was a difficult task, but you came through for us. Please pass my deep appreciation on to your team, and let them know their efforts were a great help to us in getting much needed hardware ready for our customer.

    UTC Aerospace Systems
Call Us at 1-800-GO-GSM-GO (1-800-464-7646)

Or send us an e-mail by using our Contact Us form, and we will reach you as soon as possible.