CNC 5 AXIS MACHINIST

Trio Manufacturing, Inc.; El Segundo (CA); On-site; USD 90,000 - 120,000; Full time

Job summary

Trio Manufacturing is seeking an experienced 5-axis CNC Machinist to set up and operate 5-axis milling centers, producing precision components from billets, castings, and forgings.

You will read drawings, apply GD&T, and program or adjust CNC data to hit tight tolerances while maintaining safety and quality standards. Strong teamwork, communication, and commitment to craftsmanship are essential for success.

Qualifications

• 5–10 years of machining experience or equivalent training.
• Must read and understand engineering drawings and specs.
• Proficiency with precision inspection tools is required.

Responsibilities

• Set up and operate 5-axis CNC milling machines.
• Read blueprints and GD&T; select tools and fixtures.
• Verify parts meet specs and document results.
• Collaborate with engineers, inspectors and production staff.

Skills

Blueprint reading

GD&T

G-code/M-code

Speed & feed

Trigonometry

English communication

Education

High School Diploma

Tools

CNC Mills

Lathes

Grinders

Saws

CMM

Metrology tools

Job description

Join Trio and Help Shape the Future of Precision Manufacturing

At Trio Manufacturing, we are entering a pivotal moment in our company’s history. As we continue expanding our capabilities within the defense and aerospace industries, we are looking for the best of the best to join our team of skilled machinists.

This is more than a job — it’s an opportunity to make your mark. The work you do here will directly contribute to critical programs that matter. As Trio grows, so can you. We believe the people who help shape our future will also shape their own careers along the way.

If you take pride in precision, thrive in a high-performance environment, and want to leave your fingerprint on the defense industry, we want to hear from you.

Be part of the big move. Build something that matters. Grow with Trio.

Position Summary

The 5-Axis CNC Machinist is responsible for setting up and operating 5-axis CNC milling machines and machining centers to produce precision components from billet, castings, and forgings. This role requires strong technical expertise, attention to detail, and the ability to work with minimal supervision while maintaining the highest standards of quality and safety.

Key Responsibilities

• Communicate effectively with team members and leadership both verbally and in writing.
• Collaborate closely with machinists, engineers, inspectors, and production staff to support manufacturing goals.
• Read and interpret:
  • Work instructions
  • Blueprints and technical drawings
  • GD&T (Geometric Dimensioning & Tolerancing)
  • Sketches, manuals, and specifications
• Apply knowledge of:
  • Speed and feed calculations
  • Basic trigonometry
  • G-codes and M-codes
  • Tool geometry and perishable tooling
• Determine dimensions, tolerances, machining sequences, and setup requirements for each job.
• Measure, mark, and scribe reference points on materials and workpieces for machining guidance.
• Select, align, and secure:
  • Workholding fixtures
  • Cutting tools
  • Machine attachments and accessories
  • Raw materials
• Set machining parameters including speed, feed, coolant flow, depth, and angle of cut.
• Retrieve, input, edit, and adjust CNC programs as needed.
• Monitor machine operations to detect:
  • Malfunctions
  • Tool wear
  • Out-of-tolerance conditions
• Adjust machine controls as necessary to maintain quality standards.
• Verify finished parts meet engineering specifications and tolerances.
• Perform trial runs to validate machine setups and programmed control data.
• Collaborate with Department Leaders, Manufacturing Engineers, Supervisors, Inspectors, Planners, and Programmers to troubleshoot machining challenges.
• Complete required production documentation including:
  • Shop travelers
  • Machine logs
  • In-process inspection sheets
  • Planning change requests
• Maintain strict adherence to company policies and safety standards.

Education & Experience

• 5–10 years of related machining experience and/or formal training
• High School Diploma or equivalent required
• Equivalent combination of education and experience may be considered

Additional Qualifications

• Proficiency operating a wide range of machine shop equipment, including:
  • CNC Mills
  • Lathes
  • Grinders
  • Saws
  • CMM machines
  • Deburring equipment
• Experience using precision inspection and measurement tools, including:
  • Micrometers and calipers
  • Optical comparators
  • Profilometers
  • Various metrology equipment
• Ability to lift 20–50 lbs regularly or utilize overhead cranes when required
• Must be able to read and write in English

Why Join Trio?

At Trio, we believe great machinists deserve great opportunities.

Here you will find:

• Work that supports critical defense and aerospace programs
• A team that values craftsmanship and precision
• Opportunities for career growth as the company expands
• A chance to build something meaningful and lasting

This is your opportunity to be part of a defining moment in Trio’s journey — and in your own career.