CNC Mastercam Programmer
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Before you apply
LocationNashua, New Hampshire, United States
Work modeon-site
Typefull-time
SenioritySenior
Experience10+ yrs
DepartmentManufacturing
Company size51–200 people
PostedSep 25, 2026 · 1mo ago
Verified live1d ago
At a glanceSummarised by Seekless from the posting.
5 years of Mastercam programming experience
10+ years of machining experience
5+ years of Mastercam programming experience
Strong experience with 5-axis simultaneous machining
Experience with 3-axis mills, CNC lathes, and mill-turn equipment
Deep understanding of feeds, speeds, tooling, and work holding
Proficiency in reading blueprints and applying GD&T
Advanced Mastercam proficiency (multi-axis toolpaths, dynamic milling, multi-surface programming)
G-code knowledge and editing capability
Fixture design input and setup strategy development
Strong knowledge of tight-tolerance machining (±.0005”)
Experience machining high-strength alloys (titanium, Inconel, hardened steels, aluminum alloys)
Strong problem-solving and analytical skills
Attention to detail and quality-focused mindset
Ability to prioritize and manage multiple jobs simultaneously
Effective communication with production and engineering teams
Commitment to safety and continuous improvement
Experience working in a military, aerospace, or defense manufacturing environment
Ability to obtain or maintain required security clearance (if applicable)
Due to the nature and importance of GSM’s work, our positions require access to export-controlled information. Therefore, all candidates must qualify as a U.S. Person under applicable export-control/ITAR regulations or otherwise be authorized to access such information under U.S. law.
Skills
Mastercam
CNC
G-code
MIG
TIG
FCAW
SAW
Benefits
Medical insurance
Dental insurance
Vision insurance
Life insurance
Disability benefits
401(k)
401(k) matching
Paid time off
Holidays
Flexible spending accounts
Health savings account
Referral program
Training and career growth
Employee assistance program
About the company
Granite State Manufacturing is a leading contract manufacturer of large, complex, precision machined and welded components, supporting the US Navy in building submarines.
We specialize in high-mix, low-to-medium volume production, delivering precision, quality, and on-time performance on custom-engineered products. Our capabilities include:
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Large-format CNC machining
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Heavy fabrication and welding (MIG, TIG, FCAW, SAW)
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Assembly, inspection, and testing
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Program management for complex builds
We are known for handling tight tolerances, complex geometries, and demanding customer specifications.
Our work environment is supportive, providing what our people need to do great work.
POSITION SUMMARY
We are seeking an experienced CNC Programmer / Mastercam Programmer with 10+ years of machining experience and 5+ years of Mastercam programming experience to support high-precision manufacturing operations in a fast-paced military production environment. This role requires expertise in multi-axis machining, strong technical problem-solving skills, and the ability to produce mission-critical components with strict quality and compliance standards.
ESSENTIAL FUNCTIONS AND RESPONSIBILITIES
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Program 3-axis, 4-axis, and 5-axis CNC milling machines using Mastercam
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Program CNC lathes and mill-turn machines
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Develop, optimize, and troubleshoot complex toolpaths for tight-tolerance parts
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Interpret and work from complex blueprints, GD&T, and military specifications
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Set up and prove out new programs on the shop floor
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Select appropriate tooling, fixtures, and cutting strategies for high-efficiency machining
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Collaborate with engineers, machinists, and quality control personnel
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Maintain program documentation and revision control
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Improve cycle times while maintaining quality and safety standards
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Support continuous improvement initiatives in a high-mix, low-volume environment
Requirements
QUALIFICATIONS, SKILLS, AND ABILITIES
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5 years of Mastercam programming experience
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Strong experience with 5-axis simultaneous machining
•
Experience with 3-axis mills, CNC lathes, and mill-turn equipment
•
Deep understanding of feeds, speeds, tooling, and work holding
•
Proficiency in reading blueprints and applying GD&T
•
Experience working in a military, aerospace, or defense manufacturing environment preferred
•
Ability to obtain or maintain required security clearance (if applicable)
•
Due to the nature and importance of GSM’s work, our positions require access to export-controlled information. Therefore, all candidates must qualify as a U.S. Person under applicable export-control/ITAR regulations or otherwise be authorized to access such information under U.S. law.
Technical Skills
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Advanced Mastercam proficiency (multi-axis toolpaths, dynamic milling, multi-surface programming)
•
G-code knowledge and editing capability
•
Fixture design input and setup strategy development
•
Strong knowledge of tight-tolerance machining (±.0005” )
•
Experience machining high-strength alloys (titanium, Inconel, hardened steels, aluminum alloys)
Work Environment
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High-paced, deadline-driven military manufacturing environment
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Strict adherence to quality, documentation, and compliance standards
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Team-oriented shop floor with cross-functional collaboration
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Emphasis on precision, repeatability, and mission-critical reliability
Key Competencies
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Strong problem-solving and analytical skills
•
Attention to detail and quality-focused mindset
•
Ability to prioritize and manage multiple jobs simultaneously
•
Effective communication with production and engineering teams
•
Commitment to safety and continuous improvement
EEO STATEMENT
Granite State Manufacturing (GSM) is an equal opportunity employer. GSM does not discriminate on the basis of race, color, religion, sex, gender, gender identity or expression, national origin, citizenship, veteran status, age, physical or mental disability, genetic information, marital status, sexual orientation, or any other consideration made unlawful by applicable federal, state, or local laws in its programs, activities, or employment.
Benefits
Compensation & Benefits
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Competitive salary
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Medical insurance
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Dental & Vision, Life insurance (Company paid)
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Disability benefits (Company paid)
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401(k) & 401(k) company matching
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Paid time off and holidays
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Flexible spending accounts
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Health savings account
•
Referral program
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Overtime opportunities (if applicable)
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Training and career growth in advanced manufacturing
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Employee assistance program
Why Join Us?
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Work on large-scale, one-of-a-kind projects
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Stable industry with strong customer demand
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Opportunity to grow in a flexible, high-skill environment
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Collaborative team focused on quality and craftsmanship
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