CNC Mastercam Programmer

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
Program 3-axis, 4-axis, and 5-axis CNC milling machines using Mastercam
Program CNC lathes and mill-turn machines
Develop, optimize, and troubleshoot complex toolpaths for tight-tolerance parts
Interpret and work from complex blueprints, GD&T, and military specifications
Set up and prove out new programs on the shop floor
Select appropriate tooling, fixtures, and cutting strategies for high-efficiency machining
Collaborate with engineers, machinists, and quality control personnel
Maintain program documentation and revision control
Improve cycle times while maintaining quality and safety standards
Support continuous improvement initiatives in a high-mix, low-volume environment
Requirements
QUALIFICATIONS, SKILLS, AND ABILITIES
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
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
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
High-paced, deadline-driven military manufacturing environment
Strict adherence to quality, documentation, and compliance standards
Team-oriented shop floor with cross-functional collaboration
Emphasis on precision, repeatability, and mission-critical reliability
Key Competencies
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
Granite State Manufacturing offers a comprehensive benefits package to all GSM employees.
Paid time off
Floating holidays
Paid holidays
401(k)
401(k) company matching
Dental & Vision insurance (Company paid)
Disability benefits
Employee assistance program
Flexible spending account
Competitive health insurance
Health savings account
Life insurance
Voluntary benefits
Referral program
…and much more.