Verified Nov 2026
Electronics & Software
·
Manchester, New Hampshire
·
Since 1937
Granite State Manufacturing is a family-owned contract manufacturer headquartered in Manchester, New Hampshire, founded in 1937. With 100–200 employees and estimated revenue of $10–50 million, the company serves automotive, electric-vehicle, electronics, medical, military-defense, and plumbing-hardware sectors. GSM specializes in precision machining, welding, assembly, and testing for performance-critical electromechanical systems, including submarine and maritime applications.
Granite State Manufacturing at a glance
Revenue
$10-50M
Est. band
Employees
100-200
Founded
1937
Headquarters
Manchester, New Hampshire
Certifications
AS9100 · ISO 9001 · ITAR registered
Industries
Automotive
Electric Vehicles
Electronics
Medical
Military & Defense
Plumbing & Hardware
STABILITY SIGNALS
Established & active
89 years in operation (founded 1937).
Holds AS9100, ISO 9001, ITAR registered certification(s) per public sources.
Overview
Granite State Manufacturing is a family-owned contract manufacturer headquartered in Manchester, New Hampshire, founded in 1937. With 100–200 employees and estimated revenue of $10–50 million, the company serves automotive, electric-vehicle, electronics, medical, military-defense, and plumbing-hardware sectors. GSM specializes in precision machining, welding, assembly, and testing for performance-critical electromechanical systems, including submarine and maritime applications.
At a glance
Attribute | Detail |
|---|---|
Founded | 1937 |
Headquarters | Manchester, New Hampshire |
Employees | 100-200 |
Revenue | $10-50M (estimated) |
Primary capability | Electronics & Software |
Certifications | AS9100 · ISO 9001 · ITAR registered |
What Granite State Manufacturing makes
GSM holds AS9100, ISO 9001, and ITAR registration; capabilities include CNC machining, precision welding to military specifications, NDT inspection, and electromechanical assembly.
Products and capabilities described on the company's own site include Machining, CNC Machining, Welding (source: granitestatemfg.com).
Certifications
Granite State Manufacturing is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
AS9100 — granitestatemfg.com
ISO 9001 — granitestatemfg.com
ITAR registered — robottoday.com
Latest developments
2026-09-25 — This week, the Rising Tide team had the pleasure to visit our client Granite State Manufacturing in Nashua along with Rep. Maggie Goodlander. Rep. Goodlander saw firsthand how GSM’s continued investment in … (linkedin.com)
2026-05-21 — Submarine Industrial Base Program Office | Granite State Mfg (granitestatemfg.com)
2026-04-14 — The Maritime Industrial Base Needs 250,000 Skilled Workers (granitestatemfg.com)
2026-03-06 — In partnership with the Maritime Industrial Base Program, GSM has been able to co-invest in our capacity, leverage our community colleges, and contribute to a mission bigger than any one company. | Granite State Manufacturing (linkedin.com)
2026-02-27 — Granite State Manufacturing continues to build out the 2nd shift in our Manchester, NH facility - because the mission can't wait. | Granite State Manufacturing (linkedin.com)
2025-11-20 — Granite State Manufacturing has seen firsthand the impact of these DoD workforce development investments — and we’re thrilled to see this new four-year agreement in place. Congratulations to SENEDIA on continuing this … | Granite State Manufacturing (linkedin.com)
Facilities
Granite State Manufacturing is headquartered in Manchester, New Hampshire. Public sources also reference these locations:
Manchester, New Hampshire — robottoday.com
Company details
The company operates a secondary facility in Nashua, New Hampshire, and participates in the Maritime Industrial Base Program to expand skilled workforce capacity. Granite State Manufacturing was founded in 1937, has an estimated 100-200 employees, and is headquartered in Manchester, New Hampshire. On the LightSource stability read it is rated "Established & active": 89 years in operation (founded 1937). Holds AS9100, ISO 9001, ITAR registered certification(s) per public sources.
Frequently asked questions
What does Granite State Manufacturing make?
Granite State Manufacturing is a family-owned contract manufacturer headquartered in Manchester, New Hampshire, founded in 1937. With 100–200 employees and estimated revenue of $10–50 million, the company serves automotive, electric-vehicle, electronics, medical, military-defense, and plumbing-hardware sectors. GSM specializes in precision machining, welding, assembly, and testing for performance-critical electromechanical systems, including submarine and maritime applications.
Where is Granite State Manufacturing headquartered?
Granite State Manufacturing is headquartered in Manchester, New Hampshire (124 Joliette Street, Manchester, New Hampshire, 03102).
When was Granite State Manufacturing founded?
Granite State Manufacturing was founded in 1937.
How big is Granite State Manufacturing?
Granite State Manufacturing has an estimated 100-200 employees, with revenue in the $10-50M range (estimated).
What certifications does Granite State Manufacturing hold?
Granite State Manufacturing lists AS9100 · ISO 9001 · ITAR registered on its website. Confirm the certified scope for the specific plant producing your part.
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Last verified Nov 2026. Is this your company? Request a correction.
Location & contact
Phone
+1 800-464-7646
Certification
AS9100 · ISO 9001 · ITAR registered
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