Prototype Machinist

Mach-Industries; Los Angeles (CA); On-site; USD 108,886,000 - 137,540,000; Full time

Benefits offered by this job

Healthcare, dental and vision plans

Retirement plans

Equity participation

Paid time off

Professional development funds

Job summary

Mach Industries in Huntington Beach, CA is seeking a skilled Prototype Machinist to turn early-stage designs into functional hardware. You will own the complete machining process, from setup and programming to inspection, working with engineering to accelerate development in a fast-paced, high-accountability environment.

The ideal candidate has 4+ years of CNC experience, proficiency with GD&T, and a track record of delivering precise, high-quality components under tight timelines.

Qualifications

• 4+ years CNC machining experience including setup and operation of multi-axis milling and turning.
• Prototype/R&D or low-volume manufacturing experience in fast-paced environment.
• Strong proficiency reading drawings, CAD models, and GD&T.
• Experience setting up and operating 3-axis and 5-axis CNC machining centers.
• Ability to edit and troubleshoot G-code programs; knowledge of feeds and speeds.
• Proficiency using precision inspection equipment and interpreting inspection results.
• Safety-conscious with ability to lift up to 50 lbs and work hands-on in manufacturing.

Responsibilities

• Machine complex prototype and low-volume components on CNC mills/lathe.
• Interpret drawings, CAD models, and GD&T to determine strategies.
• Set up, operate, and troubleshoot CNC equipment.
• Collaborate with design/manufacturing engineers to improve part manufacturability.
• Program, edit, and optimize CNC programs and toolpaths.
• Perform first-article and in-process inspections; ensure tight tolerances.

Skills

CNC machining

reading drawings

GD&T proficiency

G-code editing

multi-axis setup

inspection & metrology

problem solving

communication with engineers

Education

High school diploma or equivalent

Machining certification (plus)

Tools

Fusion 360

Mastercam

NX CAM

HyperMill

CMM programming

Job description

Huntington Beach, California, United States

About Mach Industries

Founded in 2023, Mach Industries is a rapidly growing defense technology company focused on developing next-generation autonomous defense platforms. At the core of our mission is the commitment to delivering scalable, decentralized defense systems that enhance the strategic capabilities of the United States and its allies. With a workforce of approximately 350 employees, we operate with startup agility and ambition.

Our vision is to redefine the future of warfare through cutting-edge manufacturing, innovation at speed, and unwavering focus on national security. We are dedicated to solving the next generation of warfare with lethal systems that deter kinetic conflict and protect global security.

The Role

Mach is seeking a highly skilled Prototype Machinist to support the development of next-generation hardware through precision machining and rapid iteration. In this role, you will work closely with engineering teams to transform early-stage designs into functional prototypes, helping accelerate product development from concept to reality. You will own the complete machining process, from setup and programming adjustments to inspection and troubleshooting, while operating in a fast-paced, high-accountability environment where speed, quality, and innovation are critical.

Key Responsibilities

• Machine complex prototype and low-volume production components using CNC mills, lathes, and multi-axis machining centers.
• Interpret engineering drawings, CAD models, and GD&T requirements to determine optimal machining strategies.
• Set up, operate, and troubleshoot CNC equipment with minimal supervision.
• Collaborate directly with design and manufacturing engineers to improve part manufacturability and reduce iteration cycles.
• Program, edit, and optimize CNC programs and toolpaths to meet aggressive development timelines.
• Select tooling, workholding, and machining parameters appropriate for a wide range of materials and geometries.
• Perform first-article and in-process inspections using precision measurement equipment, including calipers, micrometers, height gauges, and CMMs.
• Identify root causes of machining and quality issues and implement corrective actions quickly.
• Maintain tight tolerances and exceptional surface finishes on precision components.
• Support new process development, fixture design, and manufacturing experiments to improve efficiency and capability.
• Document machining processes, inspection results, and lessons learned to support knowledge sharing and continuous improvement.
• Maintain a safe, organized, and efficient machine shop environment.

Required Qualifications

Experience: 4+ years of CNC machining experience, including setup and operation of multi-axis milling and turning equipment.

Prototype Manufacturing: Experience producing prototype, R&D, or low-volume precision components in a fast-paced environment.

Technical Skills:

• Strong proficiency reading engineering drawings, CAD models, and GD&T specifications.
• Experience setting up and operating 3-axis and 5-axis CNC machining centers.
• Ability to edit and troubleshoot G-code programs.
• Strong understanding of feeds, speeds, tooling selection, and machining fundamentals.
• Proficiency using precision inspection equipment and interpreting inspection results.

Problem Solving: Demonstrated ability to independently troubleshoot machining, tooling, and quality challenges.

Communication: Comfortable working directly with engineers and providing manufacturing feedback during the design process.

Physical Requirements: Ability to lift up to 50 lbs and work hands-on in a dynamic manufacturing environment.

Education: High school diploma or equivalent required; technical trade school or machining certification is a plus.

Safety: Strong commitment to safe shop practices and equipment maintenance.

Preferred Qualifications

• Experience supporting aerospace, defense, robotics, space, automotive, or advanced hardware development programs.
• CAM programming experience using Fusion 360, Mastercam, NX CAM, HyperMill, or similar software.
• Experience machining aluminum, stainless steel, titanium, Inconel, and other difficult-to-machine materials.
• Knowledge of fixture design, custom workholding, and process development.
• Experience with CMM programming and advanced metrology tools.
• Familiarity with CAD software and the product development lifecycle.
• Experience working in startup, R&D, or rapid-prototyping environments where flexibility and speed are essential.
• Lean manufacturing and continuous improvement experience.

Additional Requirements

• Available to work extended hours and weekends as needed

To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITARhere .

Pay Range

$38 - $48 USD

At Mach, we believe that compensation is more than just a paycheck. It's a comprehensive package designed to reward the time, skills, and expertise you bring to our team. We are committed to offering competitive compensation that is equitable, transparent, and aligned with market trends.

Key Elements of Our Compensation Philosophy:

• Competitive Salaries: We continuously research market rates to ensure our salaries are competitive with those in our industry and geographic location.
• Performance-Based Incentives: Our bonus structure is tied to both individual and company performance, creating a win-win scenario that motivates our team members to excel.
• Equity Participation: We offer stock options or equity to employees, ensuring that you share in the success and growth of the company.
• Benefit Packages: Our benefits include healthcare, dental and vision plans, retirement savings, and paid time off, because we understand that your well-being extends beyond the office.
• Professional Development: We allocate funds for continuing education, training, and career growth.
• Transparency: We are committed to openness about our compensation tiers and how decisions are made, ensuring trust and mutual respect.

By joining Mach, you’re not just accepting a job—you’re becoming a key part of a team that values your contributions and invests in your growth. Together, we aim to create a rewarding environment that sets the stage for long‑term success.

This position may require access to information protected under U.S. export control laws and regulations, including the Export Administration Regulations (EAR) and the International Traffic in Arms Regulations (ITAR). Please note that any offer for employment may be conditioned on authorization to receive software or technology controlled under these U.S. export control laws and regulations without sponsorship for an export license.

Mach participates in E-Verify and will provide the federal government with your Form I‑9 information to confirm that you are authorized to work in the U.S.

The salary range for this role is an estimate based on a wide range of compensation factors, inclusive of base salary only. Actual salary offers may vary based on (but not limited to) work experience, education and training, critical skills, and business considerations. Highly competitive equity grants are included in most offers and are considered part of Mach’s total compensation package. Mach offers benefits such as health insurance, retirement plans, and opportunities for professional development.

Mach is an equal opportunity employer committed to creating a diverse and inclusive workplace. All qualified applicants will be treated with respect and receive equal consideration for employment without regard to race, color, creed, religion, sex, gender identity, sexual orientation, national origin, disability, uniform service, Veteran status, age, or any other protected characteristic per federal, state, or local law, including those with a criminal history, in a manner consistent with the requirements of applicable state and local laws.