Welcome to Granite State Manufacturing!

GSM, your strategic small business partner for complex manufacturing, is a leading provider of integrated manufacturing solutions with over 75 years of experience.

Mine Hunter Cradle with stands


SPS 10 machining 300 x 225

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.

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 75 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 AS9100C 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.


  • GSM was able to take a complex product line and bring it into their production facilities, while identifying ways to improve our products and reduce our costs

    Eric Golden
    CEO, Equipois Inc.
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.