CNC Machinist - Precision Prototyping

The role

This person will operate CNC milling machines and lathes to manufacture high-precision components. They will work in an advanced prototyping facility to produce parts for optical, aerospace, and mechanical systems.

What you will do

• Operate CNC milling machines and CNC lathes to manufacture precision components.
• Machine complex parts from engineering drawings, CAD models, and machining instructions.
• Monitor machining operations to maintain dimensional accuracy and surface finish.
• Select and change cutting tools and monitor tool wear.
• Perform first-piece and in-process inspections using precision measuring instruments.
• Read and interpret engineering drawings, machining specifications, and GD&T.
• Identify and troubleshoot machining issues related to tooling, materials, and accuracy.
• Perform deburring, finishing, and other post-machining operations.
• Work with mechanical, optical, and manufacturing engineers to produce prototype components.
• Support fabrication processes including wire EDM, waterjet cutting, laser cutting, and additive manufacturing.

Required qualifications

• 3+ years of hands-on CNC machining experience in a machine shop, precision manufacturing, or engineering prototyping environment.
• Experience operating CNC milling machines and/or CNC lathes.
• Ability to read and interpret engineering drawings, machining specifications, and basic GD&T.
• Experience using precision measuring instruments, including calipers, micrometers, dial indicators, and height gauges.
• Understanding of machining fundamentals, including cutting tools, speeds and feeds, material removal, and surface finishes.
• Experience machining common metals such as aluminum, stainless steel, and titanium.
• Ability to recognize machining defects, troubleshoot basic issues, and maintain consistent part quality.
• Strong mechanical aptitude, attention to detail, and commitment to precision workmanship.
• Ability to work independently and collaborate with engineers and technicians.
• Willingness to occasionally support time-sensitive projects outside standard business hours.

Nice to have

• Experience operating multi-axis CNC mills, including 4-axis or 5-axis machines.
• Experience in prototype, high-mix/low-volume, or research and development manufacturing environments.
• Experience machining tight-tolerance components for aerospace, robotics, optics, or precision mechanical applications.
• Experience operating manual machine tools, including Bridgeport-style vertical milling machines and manual engine lathes.
• Familiarity with SolidWorks or other CAD software for viewing and interpreting part models.
• Experience with complex workholding, custom fixtures, and precision machining techniques.
• Familiarity with wire EDM, waterjet cutting, laser cutting, and additive manufacturing.
• Experience with CMM inspection or other advanced metrology equipment.
• Experience machining specialty alloys, difficult-to-machine materials, or components requiring specialized handling.
• Familiarity with vacuum-compatible materials and manufacturing cleanliness requirements.

Benefits

• Competitive Compensation
• Equity Opportunities with stock options
• Flexible Work Environment
• Unlimited PTO (Salaried positions only)
• Comprehensive medical, dental, and vision coverage with 100% of the premium paid by the employer
• Access to cutting-edge hardware and software

About the company

Observable Space is a vertically integrated, high-growth, space technology company building precision optics platforms for Earth and in space. They deliver foundational systems enabling continuous, real-time navigation, observation, and communication in space.