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Job Description

Overview

Radiant is a startup based in El Segundo, CA, focused on building portable nuclear microreactors. The CNC Machinist will play a crucial role in programming, setting up, and operating CNC machines to produce precision components for the company's innovative microreactor unit.

Responsibilities

  • Develop and optimize CNC programs for various milling and 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.
  • Select proper tooling, workholding, and cutting parameters for various materials.
  • Troubleshoot machining and programming issues to maintain quality output.
  • Continuously improve machining processes through data-driven feedback.
  • Maintain adherence to safety and quality standards across all operations.
  • Support additional technician duties or cross-functional shop activities as needed.

Requirements

  • 5+ years of experience in CNC machining and programming in a precision manufacturing or aerospace environment.
  • Proficiency in CAM software such as Mastercam, Siemens NX, Fusion 360, or CATIA.
  • Strong understanding of G-code, M-code, feeds, speeds, and toolpath strategies.
  • Hands-on experience setting up and operating mills, lathes, and multi-axis machining centers.
  • Ability to interpret complex technical drawings, GD&T, and 3D CAD models.
  • Proven ability to take a part from print to finished component.
  • Strong problem-solving skills and attention to detail.

Benefits

  • Stock
  • Health Insurance
  • Vision
  • Dental
  • PTO

Additional Information

  • Must be willing to work extended hours and weekends as necessary.
  • Must work 100% onsite at El Segundo HQ.

Benefits

Stock
Health Insurance
Vision
Dental
PTO
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How this job compares in El Segundo, CA

Pay in context

This employer didn't publish a rate. For reference, welding jobs in El Segundo, CA currently run a median of $40/hr in our index, with the middle half of them falling between $38–$53/hr across 16 postings with published pay. That median is a reasonable floor to anchor on when a recruiter asks what you're looking for.

The local market in El Segundo, CA

We're tracking 18 other active welding openings in El Segundo, CA right now, from 10 different employers. 10 of them were added in the last week. Across California as a whole we're tracking 650 other active welding openings from 315 employers. A metro this active generally means you have real leverage — employers here are competing for the same welders. Browse every welding job in El Segundo, or widen the search to California.

Radiant currently has 1 other opening live in California, which is usually a sign of either steady growth or steady turnover — worth asking which in the interview.

The most active employers in California at the moment, by number of open welding reqs, are SpaceX (34), Honeywell Aerospace (16), and Aerotek (13). Volume like that usually means either a genuine expansion or a staffing agency working several client sites — worth knowing which before you apply.

Within California, the best-paying metros we track by median hourly rate are Santa Ana at $53/hr, Redondo Beach at $51/hr, and Long Beach at $42/hr. If you can relocate or commute, that spread is worth factoring in.

Similar openings near El Segundo, CA

Pay figures are medians computed from live postings in the Welding Pros index, not from survey data, and they move as employers post. CNC Machinist figures were last recalculated when this page was built.