CNC Mastercam Programmer

Granite State Manufacturing•Nashua, NH

9d•Onsite

About The Position

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 large-format CNC machining, heavy fabrication and welding, assembly, inspection, and testing, and 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. 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.

Requirements

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)
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.
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

Nice To Haves

Experience working in a military, aerospace, or defense manufacturing environment

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