CNC Manufacturing Engineer

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

Hawthorne, CA | On-site

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.

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.

• 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 work holding, 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

• 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

• 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

• 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

$100,000 – $140,000