CNC Mastercam Programmer

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 (MIG, TIG, FCAW, SAW) Assembly, inspection, and testing 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 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…