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About the Role

This is a hands-on production and prototyping role where you will machine parts, maintain equipment, manage consumables and tooling, and serve as the shop authority on design for manufacturability (DFM), actively coaching engineers to improve designs before they reach the floor. As the team grows, this role will take on direct management of junior machinists.

Responsibilities

• Establish safety protocols, inventory systems, and maintenance schedules
• Manage consumables, tooling, and fixture inventory on an ongoing basis
• Set up and operate Yama Seiki 5-axis CNC mill and Yama Seiki CNC lathe to produce prototype and low-volume production parts from engineering drawings and models
• Write and edit CNC programs (conversational or G-code); optimize feeds, speeds, and toolpaths for prototype iteration cycles
• Perform manual machining operations on mills, lathes, and drill presses as required
• Hold dimensional tolerances consistent with engineering specifications; document inspection results
• Operate polymer and metal additive manufacturing systems; manage post-processing and finishing across both material classes
• Fabricate fixtures, jigs, and holding devices to support machining and assembly operations
• Review engineering drawings and 3D models prior to manufacture; identify and flag features that are non-manufacturable, unnecessarily tight, or will drive excessive cycle time
• Work directly with engineers to iterate on designs for manufacturability — communicating tradeoffs clearly and suggesting specific geometric changes
• Provide cycle time and material cost estimates in support of engineering design studies
• Participate in design reviews as the shop authority on machining and fabrication constraints
• Interface with outside vendors and contract manufacturers — communicating specifications clearly, reviewing quotes, and managing delivery of outsourced parts and assemblies

Requirements

• 10+ years of hands-on machining experience, including 5-axis CNC mill and CNC lathe operation and setup
• Demonstrated ability to program CNC equipment (conversational and/or G-code)
• Proficient in Mastercam 2026
• Proficient in reading and interpreting GD&T engineering drawings and 3D CAD models
• Legally eligible to work with NFA-regulated items in a licensed manufacturing environment (no disqualifying factors under 18 U.S.C. § 922)
• U.S. citizen or U.S. person as defined under ITAR (22 CFR § 120.62) — required due to the nature of development programs
• Ability to pass an ATF-required background investigation

Skills

• 5-axis CNC mill operation
• CNC lathe operation
• CNC programming (conversational and G-code)
• Mastercam 2026
• GD&T
• Manual machining
• Additive manufacturing
• Design for Manufacturability (DFM)

Location

• Austin, TX

Work Type

• Onsite
• Full-Time

Experience Level

• Senior

Benefits

• Meaningful Early Equity
• Direct Roadmap Influence
• Mission-Critical Work
• Brand-new lab equipped with NVIDIA Jetsons, high-end scopes, and 3-D printers
• 100% Employer-Paid Premiums for medical, dental, and vision insurance
• 50% Employer-Paid Premiums for dependents' healthcare
• Unlimited PTO
• Zero Red Tape / Autonomy
• Relocation Assistance

About the Company

• 9 Mothers is an Austin-based defense tech company operating as an SOT/Class III manufacturer.
• Our R&D work spans advanced robotics and novel firearms systems.
• What you build today will be tested on the range tomorrow.