S2
jf_machine_shop::S2
CNC Machine Operator
no content fingerprint

CNC Machine Operator

manufacturingMachine Shop · S2 — S2 — Support Specialist · Support

Operates computer-controlled machining equipment to produce parts according to specifications under routine supervision.

Median pay · United States · annual

$44,288 USD

+15% vs S1 on this ladder

Typical range ()

$32,532$60,292

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2 of 8

Track

Support

Family rungs priced

S1 · S2 · S3 · S4 · S5

manufacturing

Coordinates

2 / 4 spaces

pay@2 · 2026-07

What this role is

Operates computer-controlled machining equipment to produce parts according to specifications under routine supervision. At the Support Specialist (S2) level, the role owns a defined queue or customer set, standard issues within known procedures, and drives customer satisfaction for own queue. None.

What this level does

  • Sets up basic machining jobs on CNC milling and turning centers from setup sheets and verbal instructions from senior employees, loading tools, setting work offsets, and touching off
  • Runs a range of machines through a production shift, recognizing when a part is trending out of tolerance and making the routine offset or speed/feed adjustment to correct it
  • Performs detailed quality inspections against blueprints using calipers, micrometers, height gauges, and bore gauges, and records measured values on inspection sheets
  • Reports recurring dimensional drift or tooling problems to senior machinists and knows when a deviation requires escalation rather than a self-adjustment
Knowledge applied
Broad knowledge of CNC control operation and inspection tooling; sets up basic jobs from setup sheets and carries out varied multi-step machining tasks.
Complexity & problem solving
Semi-routine tasks; recognizes when a dimension is drifting and makes the routine offset or parameter adjustment, escalating anything outside the standard fix.
Collaboration & interaction
Routine peer interaction on the floor; takes verbal direction from senior machinists and records inspection results for others.
Typical experience
1–2 years; some related production machining experience.

Skills at this level

CNC Machine Operation
Operates CNC milling and turning centers from setup sheets — loading tools, setting work offsets, touching off, and running production jobs to blueprint dimensions.
CNC Programming and Code Editing
Programs and modifies CNC G-code at the control, setting speeds, feeds, tool paths, and work-holding using knowledge of math, tooling, and how materials react to stress and heat.
Wear Offset Adjustment
Reads a part's measured dimension against the print and adjusts wear offsets in the machine control to bring the feature back to target during a run.
Blueprint and Specification Interpretation
Interprets technical blueprints, models, and GD&T specifications to determine the dimensions, tolerances, and features a machined part must meet.
Dimensional Inspection
Performs detailed quality inspections using calipers, micrometers, height gauges, bore gauges, and go/no-go pins, verifying parts to tolerances sometimes within .0001 of an inch.
Machine Setup and Work-Holding
Selects and configures fixtures, chucks, vises, and tooling to hold a part rigidly and locate it correctly for the machining operation.
Manual Machining
Operates manual mills, lathes, grinders, and other machine tools to cut and finish metal parts where a manual operation is faster or more appropriate than CNC.
Machining Troubleshooting
Diagnoses in-process problems — chatter, tool breakage, poor surface finish, dimensional drift — and determines the tooling, fixturing, or parameter change that corrects them.
Tooling and Cutting Parameter Selection
Chooses cutting tools, inserts, coolant, speeds, and feeds appropriate to the material and geometry to hold tolerance and maximize tool life.
Root-Cause Analysis of Production Problems
Finds the underlying cause of recurring scrap or process failures on the floor and recommends work-holding, tooling, or method changes to prevent recurrence.
Machining Process Improvement
Applies lean manufacturing and Six Sigma techniques to reduce cycle time, scrap, and rework across families of machined parts.
Setup Procedure Development
Develops and proves out machining methods and setup sheets for complex geometries and tight-tolerance 5-axis work so that others can repeat the job reliably.
Shop Floor Mentoring
Guides and trains less experienced machinists through difficult setups and troubleshooting, and coordinates work across the machine shop as a working lead.
Preventive Maintenance and Tooling Inventory
Maintains machine condition through routine preventive maintenance and manages the shop's tooling inventory to keep production running.

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As of · 2026-07-30

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