Senior Machinist

TibaRay is developing the Galactica™ linear accelerator platform to bring FLASH radiotherapy—cancer treatment delivered in a fraction of a second—to patients worldwide, with applications across healthcare, non-destructive testing, and security imaging. Our machine shop builds the precision components at the heart of this technology, and we’re looking for an experienced machinist to help us deliver high-quality parts that move our mission forward. We’re hiring a Senior CNC Machinist to set up, program, and operate CNC mills producing precision components to tight tolerances. You’ll work from technical drawings, recommend tooling and machining strategies, run and inspect parts, and help prepare assemblies for hydrogen brazing. This is a hands-on role in a high-mix/low-volume environment for an experienced machinist who can take full ownership to independently program, set up, and run complex parts from start to finish. WHAT YOU'LL DO: Review new projects and technical drawings to set up and program CNC machines. Adjust machine cutting paths and settings to optimize production while maintaining high-quality standards. Research and recommend tools necessary for cutting specific materials, and program machines accordingly. Conduct test runs and operate machines as needed to ensure quality production. Inspect parts and perform first-article checks to confirm they meet print and tolerance requirements. Assist in prepping assemblies for hydrogen braze and loading the furnace. Support general shop activities: preventative maintenance, ordering tooling, prepping material, and small manual machining. WHO THRIVES HERE: Curious and detail-oriented with a strong quality and safety mindset. Able to work independently with minimal supervision and juggle multiple jobs. A natural troubleshooter who solves problems under tight tolerances. Reliable, with good attendance and clear, early communication when issues arise. A team player who takes ownership and looks for ways to improve the process. REQUIRED EXPERIENCE & SKILLS Minimum 10+ years setting up, programming, and operating CNC mills(Fanuc preferred) 3+ years of Mastercam experience. Other software considered depending on programming experience. Must have manual machining experience(mill and lathe) for small jobs and/or modify tooling, fixturing, etc. In-depth knowledge of materials, speeds and feeds, fixtures, tooling, and machining processes. Ability to design/build your own fixturing for one-off jobs. Strong blueprint reading skills, including interpretation of drawings, revisions, GD&T, tolerances, and symbols. Proficiency with precision inspection tools—calipers, micrometers, height gauges, indicators, gauge pins, etc. Solid shop math, including the trigonometry needed for offsets, geometry, speeds, and feeds. Clear communication, a strong desire to learn, and a commitment to continuous improvement. Willingness to learn and understand braze prep for hydrogen ovens. PREFERRED: Experience with SolidWorks, including 3D modeling and drafting—not just reading 2D prints. 4th-axis or multi-axis machining experience. Familiarity with a quality management system such as ISO 9001. Technical certificate, apprenticeship, or NIMS certification. Prior experience in a prototype/R&D environment. WORK ENVIRONMENT & PHYSICAL REQUIREMENTS On-site role in an active machine shop; PPE required and provided where appropriate. Ability to lift up to 50 lbs and stand for extended periods. Shop hours are 6:00 AM–6:00 PM; occasional overtime as needed. No on-call expectations. #J-18808-Ljbffr