Lead CNC Machinist - Precision Prototyping

About Observable Space

At Observable Space, we're redefining how humanity observes and connects with the universe. We're a vertically integrated, high-growth, space technology company building industry-leading precision optics platforms for Earth and in space. Our systems are trusted by thousands of customers, including NASA, JPL, SpaceX, Boeing, RTX, the US Space Force and the U.S. Department of War, leading research institutions and international partners.

We combine precision opto-mechanical hardware, embedded compute, cloud orchestration, and developer-friendly APIs into world class products at scale with in-house manufacturing. From advanced ground stations, on-orbit sensor suites, free space optical lasercom, to distributed compute platforms, we deliver the foundational systems enabling continuous, real-time navigation, observation, and communication in space.

Observable Space is backed by top-tier institutional investors including Lux Capital, Upfront Ventures, RTX Ventures, Detroit Venture Partners and Embedded Ventures. To learn more, visit observable.space.

About the Role

Observable Space is seeking an experienced CNC Machinist / Programmer / Setup Specialist to join our advanced prototyping facility in Los Angeles. This is a hands-on role focused on programming, setting up, and operating CNC equipment to manufacture complex, high-precision components for advanced optical, aerospace, and mechanical systems.

Our facility supports rapid prototyping and low-volume manufacturing of challenging components using materials such as aluminum, titanium, stainless steel, specialty alloys, and glass. We are looking for a versatile machinist who can independently take a part from engineering drawing or CAD model through CAM programming, machine setup, machining, and final inspection.

The ideal candidate combines strong technical machining expertise with practical problem-solving skills and a collaborative approach to working with engineers. You will play an important role in improving manufacturability, developing machining processes, and supporting the transition of prototype designs into production.

This position offers a flexible work environment, with occasional evening or weekend availability required to support time-sensitive projects.

What You'll Do

• CNC Programming, Setup & Machining
• Program, set up, and operate multi-axis CNC milling machines, including 3-axis, 4-axis, and 5-axis equipment, as well as CNC lathes with live tooling.
• Develop, modify, and optimize CNC programs using Mastercam, Fusion 360, or comparable CAM software.
• Independently perform machine setups, including tooling selection, work offsets, fixture installation, tool probing, and program verification.
• Interpret CAD models, engineering drawings, and GD&T requirements to manufacture precision components to specification.
• Select appropriate cutting tools, machining strategies, speeds, and feeds based on material properties, part geometry, and tolerance requirements.
• Perform first-article and in-process inspections using precision measuring instruments to ensure dimensional accuracy and quality.
• Troubleshoot machining issues, optimize cycle times, and improve part quality and repeatability.
• Prototyping & Manufacturing Development
• Collaborate directly with mechanical, optical, and manufacturing engineers to evaluate designs and recommend improvements for manufacturability.
• Develop machining strategies for complex geometries, tight-tolerance components, and challenging materials.
• Design and fabricate custom fixtures, workholding solutions, jigs, and tooling for prototype and low-volume production.
• Support rapid design iterations, engineering changes, and one-off component fabrication.
• Contribute to the development and documentation of machining processes that can be transferred to our Michigan manufacturing facility.
• Support additional fabrication processes, including wire EDM, waterjet cutting, laser cutting, and additive manufacturing, as needed.
• Equipment, Quality & Shop Operations
• Perform routine machine maintenance, troubleshooting, calibration, and equipment optimization.
• Maintain accurate documentation of CNC programs, tooling, setups, machining parameters, and inspection results.
• Support continuous improvement initiatives focused on machining efficiency, precision, safety, and process reliability.
• Maintain an organized, safe, and efficient prototyping environment.
• Occasionally assist with mechanical assembly, integration, and test fixture development.
• Basic Qualifications
• 10+ years of hands-on CNC machining experience, including programming, machine setup, and operation in a precision machine shop or engineering prototyping environment.
• Demonstrated ability to independently program, set up, and machine complex parts from CAD models and engineering drawings.
• Proficiency with CAM software such as Mastercam, Fusion 360, or equivalent.
• Strong experience with CNC milling, including multi-axis machining, tooling selection, work offsets, and workholding.
• Experience reading and interpreting engineering drawings, geometric dimensioning and tolerancing (GD&T), and machining specifications.
• Proficiency with precision inspection tools, including micrometers, calipers, height gauges, dial indicators, and other dimensional measuring equipment.
• Working knowledge of CAD software such as SolidWorks or equivalent.
• Experience machining aluminum, stainless steel, titanium, engineering plastics, and other common manufacturing materials.
• Strong troubleshooting skills and the ability to identify and resolve machining, tooling, and setup issues independently.
• Ability to work closely with engineers in a fast-paced, iterative prototyping environment.
• Willingness to occasionally support time-sensitive projects outside standard business hours.

Preferred Qualifications

• Advanced experience with 5-axis CNC milling and CNC turning with live tooling.
• Experience programming and machining complex, high-precision components with tight geometric tolerances.
• Experience manufacturing components for aerospace, space systems, robotics, optics, or other precision hardware applications.
• Strong knowledge of custom fixturing, workholding strategies, and machining process optimization.
• Experience with prototype and low-volume, high-mix manufacturing environments.
• Familiarity with wire EDM, waterjet cutting, laser cutting, and additive manufacturing.
• Experience with precision metrology, CMM inspection, and first-article inspection processes.
• Experience machining specialty alloys, difficult-to-machine materials, or components requiring specialized handling.
• Familiarity with vacuum-compatible materials, machining practices, and cleanliness requirements.
• Experience with general fabrication processes, including TIG welding, sheet metal fabrication, and mechanical assembly.
• Ability to support basic finishing processes, including deburring, surface preparation, and spray finishing.
• Experience developing machining procedures and transitioning prototype processes into repeatable production workflows.

What We Offer

Competitive Compensation

– A salary package aligned with industry standards and your experience.

Equity Opportunities

– Take part in our success with stock options.

Flexible Work Environment

– Enjoy working from our office or in a hybrid work setup with the flexibility to work remotely part of the week. We require a minimum of 3 days per week in our office to support collaboration and team culture. (LA Office only)

Unlimited PTO

(exempt only) – Take the time you need with our flexible, trust-based vacation policy, including paid holidays. We encourage everyone to rest, recharge, and take care of themselves.

Health & Wellness

– Comprehensive medical, dental, and vision coverage with 100% of the premium paid by the employer for employees.

Cutting-Edge Tools

– Get access to the latest hardware and software you need to do your best work.

Mission-Driven Culture

– Be part of a team working on meaningful challenges with real-world impact.

Inclusive Team

– We foster a supportive and diverse workplace where all voices are valued.