CNC Mill Operator

United Performance Metals (ONI Company)
Hamilton, OH

Summary

The CNC Mill Machinist is responsible for set-up, operation, In-process inspections and troubleshooting of CNC milling machines to produce precision parts that meet customer specifications and quality standards. This role supports machining processes from setup through final inspection while contributing to continuous improvement in a manufacturing environment.

Safety, HS&E, and Compliance:

Enforce company safety policies and promote a strong safety culture.

Ensure PPE usage, safety training participation, near-miss reporting, and monthly safety inspections.

Maintain OSHA and EPA compliance across assigned operations.

Essential Duties and Responsibilities

Set up, fixture, and operate CNC milling machines.

Interpret engineering drawings, blueprints, and specifications to manufacture parts accurately.

Select appropriate tooling and adjust machine parameters to ensure optimal performance.

Perform routine troubleshooting and make necessary machine adjustments during production.

Measure and inspect in process and finished parts using precision gauging equipment such as calipers, micrometers, height gauges, and indicators.

Verify product quality and ensure conformance to specifications.

Maintain proper documentation of machining operations as required.

Follow all safety procedures and maintain a clean and organized work area (5S standards).

Assist in continuous improvement initiatives to enhance productivity and reduce costs.

Documentation & Reporting

Record production checks, inspection results, and issues in Excel or ERP systems (Invex).

Maintain accurate data for Recorded time to a job, traceability, scrap tracking, and production reporting.

Communicating defects, delays, or equipment concerns

Additional Responsibilities

Perform basic material handling, including loading/unloading parts.

Clean and prepare parts after machining.

Support inventory handling and part staging as needed.

Assist with basic inspection processes and packaging of finished goods.

Skills & Abilities:

Strong understanding of CNC milling processes.

Ability to read and interpret blueprints and technical drawings.

Solid shop math skills, including working with fractions, decimals, and metric/imperial conversions.

Attention to detail and strong problem-solving skills.

Ability to work independently and as part of a team.

Work Ethic

Reliable, self-motivated, and production-driven mindset

Takes ownership of tasks and work area

Communication & Teamwork

Effective communication with operators, leads, and support teams

Ability to work cross-functionally across multiple departments

Education & Experience:

High School Diploma or GED Required

2 years of CNC machining experience preferred.

Physical Requirements

Ability to lift up to 50 pounds occasionally.

Frequent handling tools and parts.

Good vision, including close-up focus, required for inspection work.

Work Environment

Manufacturing shop environment.

Exposure to moving machinery, noise, and metalworking conditions.

You should be proficient in:

  • CNC Tooling
  • Troubleshooting Skills
  • G-Code
  • Tape Measure Reading
  • M-Code
  • CNC Machine Setup & Changeover
  • Precision Measurement & Hand Metrology
  • Manual Machining Skills

Machines & technologies you'll use:

  • CNC Mill (5+ axis VMC) (Mazak, Haas, Okuma)
Posted 2026-08-18

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