What Does a CNC Machinist Do?
A CNC machinist sets up and operates computer numerical control (CNC) machines, mainly mills and lathes, to cut metal and plastic parts to the dimensions on an engineering drawing. They read blueprints, load programs and tools, set work and tool offsets, edit G-code when a cut needs adjusting, and inspect finished parts with calipers, micrometers, and gauges. CNC machinists work in machine shops and manufacturing plants that make parts for aerospace, automotive, medical device, and industrial equipment customers. Most employers require a high school diploma, machining coursework or an apprenticeship, and 2 or more years of setup experience.
The job is often confused with the machine operator positions below it and the engineering jobs above it. A CNC operator loads material, presses cycle start, and checks parts on a program someone else set up, while a CNC machinist makes the setup and fixes the program when parts drift out of tolerance. A press operator forms or stamps parts on presses and does no cutting. A manufacturing engineer plans the process and fixturing, and a quality control inspector checks the machinist’s parts on a CMM and signs off first articles.
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Hiring a CNC Machinist: What to Expect
CNC machinists come from community college and technical school machining programs, registered apprenticeships, military machinist ratings, and promotion from CNC operator jobs inside the same shop. Screen for whether the candidate has made complete setups on their own or only loaded parts, the controls and machine types they have used, and the materials and tolerances they have held. A practical check is to give them a print of a typical part and ask how they would hold it, which operation they would do first, and which dimension they would measure first; then have them read a micrometer and a dial indicator at the bench, which takes about 5 minutes and shows whether the candidate has done setup work before.
CNC machinist postings often go wrong by using “machinist” for an operator job, or “operator” for a job that requires full setups. Operators who apply to a machinist posting fail the setup test, and real machinists skip operator postings because they assume operator pay. Say whether the hire will set up and prove out jobs or only operate, list the controls and whether the work is milling, turning, or both, and state whether the shop does high-mix job shop work or long production orders of the same part.
A posting for this role should name the machine types and controls the hire will set up, such as Haas, Fanuc, Okuma, or Mazak, along with the materials and the tightest tolerance the shop holds. It should also say whether the machinist programs in CAM software such as Mastercam, Fusion 360, or Esprit, and how many machines each machinist tends at a time.
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CNC Machinist Core Responsibilities
- Set up and operate CNC lathes, mills, 5-axis mills, mill-turn machines, or grinders according to work orders and blueprints
- Read and interpret technical drawings, GD&T callouts, and G-code programs
- Select appropriate tools, fixtures, and materials for each job
- Load programs generated in CAM software such as Mastercam, Fusion 360, or Esprit and prove out new programs with single block and reduced rapids
- Set work offsets and check tool lengths with in-machine probes and tool setters
- Monitor machine operations, tend 2 or more machines at a time, and adjust offsets as tools wear
- Measure and inspect finished parts using calipers, micrometers, and gauges
- Perform routine maintenance and troubleshoot equipment issues
- Maintain clean and organized workspaces in compliance with safety standards
- Record first article and in-process inspection results and report nonconformities
Required Skills and Qualifications
Hard skills
- Experience with CNC machine setup and G-code editing on Haas, Fanuc, Okuma, or Mazak controls
- Ability to read blueprints and use precision measurement tools
- Familiarity with materials like steel, stainless steel, aluminum, titanium, or engineering plastics
- Machine setup and tooling adjustments
- Ability to read GD&T on engineering drawings
- Experience with in-machine probing and tool presetters
- Shop math and trigonometry for part dimensions and offsets
Soft skills
- Strong attention to detail and accuracy
- Manual dexterity and steady hand-eye coordination
- Ability to follow procedures and work independently
- Problem-solving and mechanical aptitude
- Clear communication with operators, programmers, and quality inspectors, and safety awareness
Educational requirements
- High school diploma or GED required
- Technical training in machining, manufacturing, or a related field preferred
Certifications
Certifications from NIMS (National Institute for Metalworking Skills), such as the Measurement, Materials, and Safety or CNC Milling and Turning credentials, are preferred.
Preferred Qualifications
- 3 or more years of experience in a CNC machining environment
- Programming experience in CAM software such as Mastercam, Fusion 360, or Esprit
- Experience working in ISO 9001, AS9100, or ISO 13485 certified shops or lean manufacturing environments
- Experience with 5-axis, mill-turn, or Swiss-type machines
- Cross-training in manual machining or fabrication
How Much Does a CNC Machinist Make?
Typical national range: $40,752 to $64,050, with a national average of $49,955. Salary data reviewed October 2026 by 4 Corner Resources.
CNC machinist salaries vary by experience, industry, organization size, and geography. Click below to explore salaries by local market.
The average national salary for a CNC Machinist is:
$49,955
Sample Job Description Templates for CNC Machinists
Entry-Level CNC Machinist
Position Overview
An entry-level CNC machinist assists with machine setup, operation, and inspection of precision parts. Working under close supervision, they support production runs and learn to maintain equipment, follow technical drawings, and meet safety standards.
Responsibilities
- Assist in setting up CNC machines based on production specifications
- Load materials and monitor machine operations during production
- Use calipers and micrometers to inspect part dimensions
- Record inspection results on paper or digital inspection sheets
- Clean parts, organize tools, and maintain work area
- Learn to read blueprints and make basic tooling adjustments
- Follow safety protocols and quality control procedures
Requirements
Hard skills
- Basic understanding of CNC mills, lathes, and their controls
- Familiarity with calipers, gauges, and hand tools
- Willingness to learn blueprint reading and G-code basics
- Basic math and measurement skills
Soft skills
- Good hand-eye coordination and attention to detail
- Reliability and punctuality
- Openness to coaching and instruction
- Safety awareness in a production environment
Education
- High school diploma or GED required
- Technical training or machining coursework preferred
Senior CNC Machinist
Position Overview
A senior CNC machinist leads high-precision machining tasks, complex setups, and quality control for advanced components. They troubleshoot equipment, interpret detailed blueprints, and hold parts to tight tolerances while following safety regulations.
Responsibilities
- Perform advanced machine setups, offsets, and program edits
- Prove out new CAM programs with toolpath simulation and single block before production
- Inspect complex parts using precision instruments and CMMs
- Identify and resolve tooling or programming issues
- Train and assist junior machinists on equipment and safety
- Work from engineering drawings and confirm parts meet GD&T requirements
- Support maintenance and process improvements
Requirements
Hard skills
- Proficiency in G-code editing and CAM programming in Mastercam, Fusion 360, or Esprit
- Expertise with lathes, mills, 5-axis mills, or mill-turn machines
- Advanced part inspection and measurement techniques
- Knowledge of lean manufacturing and quality systems
Soft skills
- Leadership and technical mentoring
- Strong troubleshooting and mechanical reasoning
- Effective communication with engineers and operators
- Sound decisions when parts drift out of tolerance during production
Education
- High school diploma required; trade certificate or associate degree preferred
Certifications
- NIMS certification or equivalent preferred
Lead CNC Machinist
Position Overview
A lead CNC machinist oversees shop floor operations, coordinates workflows, and checks that machining standards are met. They guide machinist teams, plan machine loading, and act as the go-to resource for setup, tooling, and quality control.
Responsibilities
- Supervise daily activities and prioritize job orders for CNC team
- Lead setups for complex or prototype parts
- Perform final inspections and resolve quality issues
- Train machinists and enforce safety procedures
- Collaborate with engineers on process improvements and tooling solutions
- Review machine monitoring data on spindle use and downtime and plan fixes with maintenance
- Maintain shop floor documentation and production records
Requirements
Hard skills
- Mastery of setup, programming, and inspection
- Job scheduling and machine loading across the shop
- CAM programming and toolpath verification with simulation software
- Knowledge of ISO 9001 or AS9100 documentation and first article inspection reports
Soft skills
- Leadership and team coaching
- Strong time and resource management
- Clear communicator and problem solver
- Commitment to safety and continuous improvement
Education
- Trade school or associate degree preferred
Certifications
- Advanced NIMS credentials or equivalent recommended
CNC Lathe Machinist
Position Overview
A CNC lathe machinist specializes in producing round and cylindrical parts using computer-controlled turning equipment. They manage part setups, inspect components, and maintain tight tolerances throughout production runs.
Responsibilities
- Set up and operate CNC lathes based on work instructions
- Inspect turned parts using micrometers, bore gauges, and indicators
- Load bar stock or blanks, change inserts, and adjust feeds and speeds
- Edit programs and confirm surface finishes meet specifications
- Set up bar feeders, live tooling, and sub-spindles on mill-turn lathes
- Perform routine maintenance on lathe equipment
- Document measurements and flag nonconforming parts
Requirements
Hard skills
- CNC lathe programming and operation experience
- Knowledge of turning tools and insert types
- Experience with Swiss-type or mill-turn lathes
- Blueprint and GD&T interpretation
- Manual deburring and part handling
Soft skills
- Visual accuracy and manual dexterity
- Dependability and accountability
- Ability to maintain production output with minimal supervision
- Communication with quality and engineering teams
Education
- High school diploma or equivalent required
- Vocational or technical training preferred
CNC Mill Machinist
Position Overview
A CNC mill machinist operates vertical or horizontal milling machines to create precision components from raw materials. They follow engineering drawings, adjust machine settings, and inspect parts throughout the milling process.
Responsibilities
- Set up and operate CNC milling machines to produce high-precision parts
- Read and interpret technical drawings and setup sheets
- Perform tool changes, fixture alignments, and offset adjustments
- Set work offsets with spindle probes and check tool lengths with a tool setter
- Inspect milled parts with calipers, micrometers, and height gauges
- Deburr parts and maintain a clean, safe workstation
- Make program edits and recommend process improvements
Requirements
Hard skills
- Milling machine operation and setup
- Familiarity with cutting speeds, feed rates, and material behavior
- Understanding of 5-axis machining, workholding, and zero-point fixturing
- Quality control and documentation
Soft skills
- Strong spatial reasoning and problem-solving
- Attention to measurement and finish accuracy
- Collaboration with machinists and engineering staff
- Organized and process-focused
Education
- High school diploma or GED required
- Technical certification in CNC or precision machining preferred