Computer Numerically Controlled Tool Operators
Also called CNC Machine Operator (Computer Numerical Control Machine Operator), CNC Machinist (Computer Numerical Control Machinist), CNC Operator (Computer Numerical Control Operator), or Machine Operator
Updated · Source: O*NET 31.0
What Computer Numerically Controlled Tool Operators do
You run machines that carve metal and plastic into exact parts, then measure each one to make sure it is right.
CNC stands for computer numerically controlled. The machine follows a program instead of a hand crank, cutting metal, plastic, wood or stone into parts that have to match a drawing almost exactly. You set the machine up, clamp the raw piece in place, load the right cutting tools, start the program, then check the finished part with precision measuring instruments that catch differences far too small to see.
While a part is being cut, you mostly work alone at your own machine, standing, wearing safety glasses and hearing protection near equipment that can hurt you. Between jobs and at shift changes you are face to face with people: inspectors, programmers, supervisors, and the next operator. Median pay is $50,690 a year, or $24.37 an hour.
A day in the life
You clock in, read the job order listing which parts are due today, and check the drawing for the sizes you have to hit. You mount the raw piece of metal or plastic, line up the cutting tools, and run one part first. You measure it, adjust the program a little, and let the machine run. While it cuts, you listen. A dull tool or too much shaking has a sound, and you stop the machine and swap the tool before parts go bad. Between cuts you unload finished pieces, log measurements, and sweep away the small curls of metal left behind. A supervisor asks how far along you are, because there is a deadline. Near the end of your shift you tell the next operator what to watch for.
This could fit you if you…
- ✓Like working with your hands and with machines all day
- ✓Enjoy math and measuring things precisely
- ✓Notice small changes in sound, feel, or size before others do
- ✓Want steady, orderly work with clear right and wrong answers
- ✓Prefer a job where you see the finished object
You might not like it if you…
- –Need to sit at a desk instead of standing for most of a shift
- –Dislike noise, safety gear, and being close to equipment that can injure you
- –Get bored repeating similar checks many times a day
- –Want a field that is growing, since employment is projected to change -9.4% from 2025 to 2035 while all jobs average +3.5%
How people get in
- 1Finish high school or an equivalent, which is the typical education for entry, and take all the math, shop, and drafting (technical drawing) classes you can.
- 2Get comfortable reading a blueprint, the technical drawing that shows a part's exact sizes, and using hand measuring tools such as calipers and micrometers, which measure thickness and width far more finely than a ruler can.
- 3Apply for entry-level machine operator or helper jobs in factories and machine shops; many employers hire people with no experience and train them.
- 4Expect a training period of a few months to about a year on the job, learning how to prepare machines for each new part alongside experienced operators.
- 5If you want a head start, look into a community college or technical program such as CNC Machinist Technology or Machine Shop Technology.
- 6Once you can prepare machines on your own and make parts that match the required measurements very closely, ask about harder parts, extra machines, or moving toward programming. Around 12,500 openings a year come up in this occupation.
Who tends to enjoy it
Hands-on
People who like building, fixing, working with tools, machines, plants, or animals.
Organizing
People who like keeping things accurate, orderly, and running on schedule.
Curious
People who like figuring things out, research, science, and solving problems.
Official task list
Computer Numerically Controlled Tool Operators operate computer-controlled tools, machines, or robots to machine or process parts, tools, or other work pieces made of metal, plastic, wood, stone, or other materials. May also set up and maintain equipment. (O*NET)
- Measure dimensions of finished workpieces to ensure conformance to specifications, using precision measuring instruments, templates, and fixtures.
- Set up and operate computer-controlled machines or robots to perform one or more machine functions on metal or plastic workpieces.
- Mount, install, align, and secure tools, attachments, fixtures, and workpieces on machines, using hand tools and precision measuring instruments.
- Review program specifications or blueprints to determine and set machine operations and sequencing, finished workpiece dimensions, or numerical control sequences.
- Stop machines to remove finished workpieces or to change tooling, setup, or workpiece placement, according to required machining sequences.
- Listen to machines during operation to detect sounds such as those made by dull cutting tools or excessive vibration, and adjust machines to compensate for problems.
- Implement changes to machine programs, and enter new specifications, using computers.
- Calculate machine speed and feed ratios and the size and position of cuts.
A typical day involves
Skills that matter most
- Operations Monitoring
- Operation and Control
- Critical Thinking
- Monitoring
- Quality Control Analysis
- Active Listening
What you'll need to know
- Mathematics
- Production and Processing
- Mechanical
- English Language
- Engineering and Technology
How much Computer Numerically Controlled Tool Operators make
The median pay for Computer Numerically Controlled Tool Operators in the U.S. is $50,690 a year ($24.37 an hour). Most earn between $38,140 and $73,890. (Bureau of Labor Statistics, May 2025)
Pay depends a lot on where you live: the median is highest in Washington ($107,920) and lowest in Mississippi ($39,520).
Pay by state and territory
| State | Median pay | Jobs |
|---|---|---|
| Alabama | $52,380 | 3,120 |
| Arizona | $48,950 | 1,800 |
| Arkansas | $50,280 | 2,180 |
| California | $56,510 | 21,680 |
| Colorado | $55,270 | 1,580 |
| Connecticut | $59,840 | 2,740 |
| Delaware | $50,010 | 170 |
| Florida | $46,170 | 4,040 |
| Georgia | $47,630 | 2,200 |
| Idaho | $53,340 | 480 |
| Illinois | $48,420 | 8,170 |
| Indiana | $48,590 | 9,690 |
| Iowa | $52,300 | 4,750 |
| Kansas | $48,400 | 2,540 |
| Kentucky | $49,180 | 1,740 |
| Louisiana | $49,800 | 670 |
| Maine | $59,660 | 440 |
| Maryland | $46,870 | 1,800 |
| Massachusetts | $61,630 | 2,500 |
| Michigan | $47,250 | 7,330 |
| Minnesota | $56,780 | 4,290 |
| Mississippi | $39,520 | 1,290 |
| Missouri | $51,000 | 1,500 |
| Montana | $51,880 | 240 |
| Nebraska | $49,360 | 830 |
| Nevada | $46,670 | 400 |
| New Hampshire | $59,730 | 1,770 |
| New Jersey | $54,100 | 1,770 |
| New Mexico | $44,970 | 70 |
| New York | $53,340 | 5,530 |
| North Carolina | $50,440 | 3,680 |
| North Dakota | $60,250 | 250 |
| Ohio | $49,160 | 21,250 |
| Oklahoma | $47,760 | 1,490 |
| Oregon | $56,670 | 2,920 |
| Pennsylvania | $54,590 | 7,840 |
| Rhode Island | $57,390 | 540 |
| South Carolina | $51,800 | 2,460 |
| South Dakota | $50,750 | 1,420 |
| Tennessee | $49,980 | 1,980 |
| Texas | $48,480 | 13,190 |
| Utah | $45,140 | 1,170 |
| Vermont | $57,500 | 1,190 |
| Virginia | $49,590 | 1,890 |
| Washington | $107,920 | 2,270 |
| West Virginia | $49,630 | 160 |
| Wisconsin | $52,690 | 8,330 |
| Wyoming | $54,170 | 60 |
Where to study for this
College programs that commonly lead to this career, and how many US colleges offer each.
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Source: O*NET 31.0 Database (USDOL/ETA), occupation 51-9161.00, used under CC BY 4.0 and modified by Whittle. Pay: BLS Occupational Employment and Wage Statistics (May 2025), SOC 51-9161. Outlook and entry education: BLS Employment Projections 2025–35. Program links: NCES CIP 2020 to SOC 2018 crosswalk. How we build these pages.