Granite State Manufacturing

What Granite State Manufacturing does

Granite State Manufacturing (GSM) is a family-owned, AS9100D- and ISO 9001-certified precision contract manufacturer founded in 1937 and headquartered in Manchester, New Hampshire. The company produces tight-tolerance CNC-machined and large-format-welded components exclusively for U.S. Navy submarine programs, including the Virginia-class (Block V) and Columbia-class platforms, with systems installed on every submarine in the fleet. Core manufacturing capabilities include five-axis machining (Doosan DVF 5000/8000), horizontal machining centers (Soraluce, Doosan, Kuraki, Mori), wire EDM (Makino U1310), and large-format welding of structural assemblies up to 30 feet, held to tolerances within a few thousandths of an inch and certified to SUBSAFE and NAVSEA standards. Selected components are life-critical, enabling sailors to breathe, listen, and communicate on submarine missions.

GSM operates two New Hampshire facilities: the 124 Joliette Street headquarters in Manchester (housing approximately 150 employees as of 2021) and a 120,000-square-foot Nashua plant opened in September 2021 with more than $6 million in advanced manufacturing equipment, currently utilizing roughly half its footprint, with an adjacent 27-acre parcel acquired for further expansion. The company sells through two channels: direct contracts with the U.S. Navy and subcontract relationships with the two U.S. submarine prime builders, General Dynamics Electric Boat and HII Newport News Shipbuilding. Revenue mechanics are project-based, multi-year defense contracts tied to Virginia- and Columbia-class production rates, with pricing negotiated and not publicly disclosed.

The business is deliberately concentrated on a single end market and a single customer ecosystem, and its competitive position rests on certifications, an 85-year track record on Navy platforms, and a workforce-development moat built through partnerships with Nashua Community College, Manchester Community College, SENEDIA, and the New Hampshire Job Corps — including U.S. Navy-funded precision manufacturing and welding boot camps. The company is privately held, led by CEO John R. Allard and President Joe Foster (a Navy veteran), with no disclosed institutional investors or parent entity.

Name

Granite State Manufacturing

Legal name

Granite State Manufacturing

Website

https://granitestatemfg.com

Company type

Private

Founded year

1937

Operating status

Operating

Headcount range

101–250 employees

Short description

Granite State Manufacturing is a family-owned, AS9100D-certified precision contract manufacturer in Manchester and Nashua, NH, producing tight-tolerance CNC-machined and large-format-welded components exclusively for U.S. Navy Virginia-class and Columbia-class submarine programs.

Ownership category

akta.pro rank

Product category

Defense Contract Manufacturing

NAICS

Plate Work Manufacturing (332313), Plate Work and Fabricated Structural Product Manufacturing (33231)

SIC

Fabricated Plate Work (Boiler Shops) (3443), Sheet Metal Work (3444)

akta.pro primary industry

Submarine Hull, Pressure Vessel & Structural Module Fabrication (IMAJAOAE)

Keywords

• Precision CNC machining
• Defense contract manufacturing
• Submarine component fabrication
• Large-format welding services
• Five-axis machining

Headquarters

HQ city

Manchester

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Infrastructure

Revenue model

1. Defense Manufacturing Contracts: GSM generates revenue through direct contracts with the U.S. Navy for submarine component manufacturing. The company has been awarded over $25 million in contracts supporting Virginia-class Block V and Columbia-class submarine programs. Revenue is project-based, tied to production requirements for specific submarine programs with multi-year commitments.
2. Subcontractor Work: As a supplier to prime contractors General Dynamics Electric Boat and HII's Newport News Shipbuilding, GSM manufactures components integrated into larger submarine assembly programs.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Granite State Manufacturing provides contract precision CNC machining, five-axis machining, and large-format welding services for the U.S. Navy submarine industrial base. The company manufactures tight-tolerance mechanical components, complex weldments, and life-critical submarine systems for Virginia-class and Columbia-class submarine programs. GSM operates as both a direct Navy contractor and a subcontractor to prime shipbuilders such as General Dynamics Electric Boat and HII Newport News Shipbuilding.

Product overview

Granite State Manufacturing is a precision manufacturing company operating as a single unified offering focused on defense manufacturing for U.S. Navy submarine programs. The company's core products include CNC Machining Services, Large-Format Welding, and Five-Axis Machining, which together produce precision components for Virginia-class and Columbia-class submarines. Supporting services include Engineering Review and Program Management. The company manufactures complex mechanical assemblies, large structural weldments (up to 30-foot assemblies requiring 30-ton cranes), and life-critical submarine systems that are installed on every U.S. Navy submarine. GSM operates two facilities in Manchester and Nashua, NH, and holds AS9100D and ISO 9001 certifications for aerospace and quality management.

Differentiator

Problem solved

Functional benefit

Products and services

• CNC Machining Services Precision CNC machining services for submarine components, featuring multi-axis machining centers, horizontal machining equipment, vertical machining centers, and turning equipment capable of tight-tolerance work on stainless steel and specialty alloys. Sold to defense customers including the U.S. Navy and prime shipbuilders.
• Large-Format Welding Large-format welding services for submarine structural assemblies and complex weldments, including SUBSAFE and NAVSEA certified welding on stainless steel and specialty alloys. Capable of welding structural assemblies up to 30 feet requiring 30-ton cranes to move.
• Five-Axis Machining Five-axis machining capability for complex submarine components, including large-format five-axis mills with pallet shuttle systems and mill-turn equipment such as Doosan DVF 5000 and DVF 8000 T machines.
• Life-Critical Submarine Systems Precision-manufactured life-critical systems for U.S. Navy submarines that enable crew safety systems including breathing, listening, and communication capabilities. GSM-manufactured systems are installed on every submarine in the Navy fleet.

Quantifiable outcome

• GSM parts are on every submarine in the U.S. Navy fleet
• +2 more outcomes

Named customers3 records

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Nashua Community CollegecoreStrategic or Co-development Partner · 29 March 2024Partnership delivers U.S. Navy-funded 10-week Precision Manufacturing Boot Camp training machinists for submarine industrial base careers. The program covers manual machining, Mastercam and SolidWorks software, G&M coding for CNC programming. GSM reviews curriculum and hires program graduates. Multiple cohorts have graduated with NH Signing Day celebrations.
• Manchester Community CollegecoreStrategic or Co-development Partner · 10 September 2021Workforce development partnership to train precision machining and welding professionals for submarine manufacturing. GSM contributed to curriculum development and hires graduates directly into manufacturing roles. MCC launched a free 12-week accelerated welding boot camp in 2024 in partnership with GSM and SENEDIA.
• SENEDIA (The Alliance for Defense Tech, Talent and Innovation)coreStrategic or Co-development PartnerRegional defense industry alliance providing technical support for workforce training programs. SENEDIA connects GSM with DoD Innovation, Capability, and Modernization contracts to fund training programs at community colleges. Powers curricula for precision manufacturing and welding boot camps.
• New Hampshire Job CorpsminorStrategic or Co-development PartnerWorkforce development partnership to identify and train potential employees for manufacturing positions at GSM facilities.
• U.S. NavycoreOthersPrimary customer and contract source. GSM holds direct contracts with the Navy for submarine components and participates in Navy-funded workforce training programs. The Navy's Submarine Industrial Base Program Office (established April 2026) coordinates with suppliers like GSM.

Scale indicators5 records

Recent moves7 records

Expansion highlights4 records

Direct peers

• Curtiss-Wright Corporation: Defense and industrial manufacturer with a substantial naval segment supplying precision components, nuclear reactor hardware, and submarine-related systems. Highly comparable to GSM in naval defense manufacturing focus.
• Ducommun Incorporated: Public aerospace and defense contract manufacturer offering precision machining, welding, and assembly for defense platforms. Closely comparable business model to GSM, with broader end-market exposure across fixed-wing, rotorcraft, and space.
• Triumph Group: Aerospace and defense manufacturer of complex structural assemblies and precision components, including welding and machining for military platforms. Directly comparable in services and customer mix to GSM.
• BWX Technologies: Specialty manufacturer of nuclear components, including naval nuclear reactors that power U.S. Navy submarines. Most directly comparable peer in submarine-specific manufacturing scope.
• HEICO Corporation: Aerospace and defense parts manufacturer producing FAA-approved components and specialty parts for defense and commercial platforms. Comparable precision component manufacturing model with strong defense franchise.
• Moog Inc. Precision motion control and components manufacturer serving aerospace and defense markets, including naval platforms. Comparable precision manufacturing capability for defense customers.

Broad incumbents

• General Dynamics Electric Boat: Sole U.S. prime contractor designing and building Virginia- and Columbia-class submarines. Direct customer of GSM; included as comparable because it defines the program requirements and supplier ecosystem GSM serves.
• Precision Castparts Corp: Berkshire Hathaway-owned manufacturer of complex metal components for aerospace and defense, including investment castings and machined parts. Much larger than GSM but operates in adjacent precision defense manufacturing.
• TransDigm Group: Designer and producer of proprietary aerospace and defense components, including proprietary parts for naval platforms. Adjacent in the defense manufacturing value chain with similar sole-source characteristics.
• Huntington Ingalls Industries: Parent of HII Newport News Shipbuilding, the other sole U.S. prime for Virginia- and Columbia-class submarines. Direct customer relationship with GSM and architect of submarine production schedules.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/gogsmgo
• LinkedInlinkedin.com/company/granite-state-manufacturing
• Instagraminstagram.com/granitestatemfg
• Xx.com/gogsmgo

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Granite State Manufacturing