CNC Machinist (Mill & Lathe)

About the role

General Matter enriches uranium by designing, building, and operating the world's lowest-cost enrichment services here in the US. This role owns the hands-on execution of CNC machining for critical nuclear fuel components, directly supporting the restoration of American fuel production capacity. You will partner with engineering to optimize processes, improve throughput, and enable scalable manufacturing in a mission-driven, urgency-focused environment. The ideal hire values craftsmanship, understands fundamentals, and can think strategically while troubleshooting complex multi-axis machining issues. You will run live tooling and multi-axis CNC operations, develop programs, and lead cycle-time reduction initiatives. Success in this role means contributing to a post-scarcity society where abundant, affordable nuclear energy becomes the cleanest and safest baselock power. You will be embedded in a lean, world-class team applying first-principles thinking within a culture of accountability and transparency.

Key facts

What you'll do

Program, set up, and operate CNC Mills and CNC Lathes, including live tooling and multi-axis operations to produce precision components.

Develop and optimize CNC programs using G-code and CAM-generated toolpaths for complex geometries and tight tolerances in a nuclear manufacturing context.

Execute first-article builds, prove-outs, and low-volume production runs in an R&D environment to validate processes before scaling.

Troubleshoot machining issues related to tooling, fixturing, materials, and machine dynamics to eliminate defects and improve yield.

Design, fabricate, and iterate custom fixtures and workholding solutions that enhance part stability, repeatability, and setup efficiency.

Collaborate with Manufacturing Engineering to improve part stability, repeatability, and setup efficiency across production batches.

Lead or support cycle-time reduction initiatives through toolpath optimization, tooling selection, and process redesign for higher throughput.

Identify opportunities to reduce setup time, scrap, and rework while contributing to standard work, setup documentation, and machining best practices.

Support the transition of R&D processes into stable, repeatable production workflows that can be reliably scaled to meet demand.

Work closely with design and manufacturing engineers during early-stage development to provide manufacturability feedback on part designs (DFM).

Support rapid prototyping, design changes, and engineering experiments with short turnaround times to accelerate technology development.

Assist in maintaining a clean, organized, and safe shop floor that complies with quality, safety, and regulatory standards for nuclear work.

Requirements

High school diploma or equivalency certificate is required for this position.

7+ years of CNC machining experience in a mill/lathe environment is mandatory for this role.

Strong expertise in live tooling programming is a hard requirement for successful performance.

Proven experience programming and running complex multi-axis parts is essential and must be demonstrated.

Strong understanding of GD&T is required to interpret prints and ensure conformance to specifications.

Ability to work all required shift hours, overtime and/or weekends as needed is mandatory for operational support.

Physical effort including standing, lifting, and carrying equipment up to 50 lbs. unassisted is required on the job site.

Must be able to work all required shift hours, overtime and/or weekends as needed to meet production and R&D timelines.

Equal opportunity statement applies to all employment decisions at General Matter.

Nice to have

Advanced CAM experience (e.g. Mastercam, Fusion, NX, or equivalent) to efficiently generate robust toolpaths.

Experience supporting production ramp-ups from prototype to volume to ensure smooth scale transitions.

Background in aerospace, energy, advanced manufacturing, or precision components to bring relevant domain knowledge.

Able to read blueprints and complete basic shop math accurately without constant supervision.

Able to work independently and problem-solve efficiently with minimal supervision in a fast-paced environment.

Positive attitude and ability to work well on a team to maintain a cohesive shop culture.

Willingness to provide constructive feedback to the engineering and production teams to improve tooling designs, processes, and parts.

Able to stay organized with strong attention to detail to maintain quality and documentation integrity.