Senior CNC Machinist – Build Mission-Critical Composite Hardware at a High-Growth Defense Startup!

Hawthorne, CA | On-site

Opportunity Summary

We are hiring a Senior CNC Machinist to take ownership of day-to-day machining operations inside a fast-moving defense manufacturing startup. This team is advancing a proprietary composite manufacturing process that allows complex, high-strength components to be produced faster and more cost-effectively than conventional methods. You will be the go-to machinist responsible for programming, setup, operation, and optimization of CNC equipment supporting both prototype and early production hardware. This role is ideal for someone who thrives in a hands-on shop environment, enjoys solving real machining challenges, and takes pride in producing high-precision parts that directly support national defense applications. If you enjoy tight tolerances, clean setups, efficient cycle times, and building shop standards from the ground up, this is a high-impact opportunity to grow with a scaling team.

About Us

We are a venture-backed defense manufacturing company focused on reshoring advanced composite production to the United States. Our team has demonstrated next-generation composite components in demanding aerospace and defense environments and is now scaling manufacturing capabilities to support broader mission-critical programs. Backed by strong technical validation and industry support, we are building a modern, high-performance shop culture centered around speed, precision, and accountability.

Job Duties

• Program, set up, and operate CNC vertical mills and lathes for precision molds and hardware
• Machine complex composite tooling and metal components to tight tolerances
• Perform complete part setups including workholding, tool selection, offsets, and first-article validation
• Optimize feeds, speeds, and toolpaths to reduce cycle time while maintaining surface finish and dimensional accuracy
• Read and interpret CAD models, technical drawings, and GD&T requirements
• Troubleshoot machining issues on the floor and adjust programs or setups as needed
• Develop and standardize fixturing methods and repeatable shop processes
• Maintain tool libraries, manage tooling inventory, and support procurement of cutters and consumables
• Inspect finished parts using precision measurement tools to ensure compliance
• Maintain a clean, organized, high-accountability shop environment
• Communicate clearly with engineers and leadership regarding job status, timeline risks, and machining constraints

Qualifications

• 4+ years of hands-on CNC machining experience
• Strong experience operating CNC mills and lathes in a production or prototype environment
• Proficiency with CAM software such as Fusion 360, Mastercam, or similar platforms
• Ability to read blueprints and understand GD&T
• Experience setting up jobs from raw material through finished part
• Strong mechanical aptitude and problem-solving skills
• High attention to detail and pride in craftsmanship

Preferred Experience

• Mold making experience
• Complex 3D surfacing and contour machining
• Experience machining composite materials and aluminum
• Background in aerospace, defense, or high-spec manufacturing environments
• Experience helping scale machining operations or formalizing shop standards

Why Join Us

• High ownership role in a scaling defense manufacturing startup
• Direct impact on mission-driven hardware programs
• Opportunity to help build shop standards from the ground up
• Fast-paced environment with real responsibility
• Stock options
• Paid time off
• 401(k) with employer match up to 4%
• Medical, dental, and vision coverage

Compensation Details

$100,000 – $140,000

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