About the role
About Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. CNC Machinist Radiant is seeking an CNC Programmer and Machinist who will contribute to the development of our microreactor unit. You’ll be a key contributor to Radiant, programming, setting up, and operating CNC machines to produce precision components that power our most critical systems. You’ll translate engineering designs into high-quality, manufacturable parts ensuring accuracy, efficiency, and innovation at every step. This role requires hands-on experience with CNC machining, a deep understanding of G-code and CAM software, and a passion for solving complex manufacturing challenges. You’ll work closely with engineers, machinists, and quality teams to push the limits of what’s possible in precision manufacturing.
Responsibilities and Duties: Develop and optimize CNC programs for 3-axis, 4-axis, and 5-axis mills, lathes, and multi-axis machining centers. Set up and operate CNC equipment to validate new programs and processes. Read and interpret complex engineering drawings, 3D models, and GD&T specifications. Collaborate with design and manufacturing engineers to improve part manufacturability and reduce cycle times. Select proper tooling, workholding, and cutting parameters for a variety of materials (aluminum, titanium, stainless steel, Inconel, etc.). Troubleshoot machining and programming issues on the floor to maintain high-quality output and machine uptime. Continuously improve machining processes through data-driven feedback and experimentation. Maintain adherence to safety and quality standards across all machining operations. Support additional technician duties or cross-functional shop activities as needed based to achieve company priorities. Required Skills and
