CNC Machinist

Job Description

Job Description

Position Title: Machinist

Department: Machine Shop

Location: Fenton, MO

Reports To: Production Supervisor – Machine Shop

Classification: Hourly – Non-Exempt

Schedule: 2nd Shift: Monday – Thursday, 3:15 PM – 1:15 AM OR Friday-Sunday 5am-5pm

Position Summary

The CNC Lathe Setup/Operator is responsible for setting up, operating, troubleshooting, and producing precision machined components on CNC lathes while following documented manufacturing and safety procedures. This role requires proficiency performing complete machine setups, tool changes, program adjustments, and quality inspections to ensure parts meet specifications. The ideal candidate has experience setting up one or more of the following CNC lathe platforms: Mori Seiki, Haas, Okuma, Index, or Citizen Swiss Lathes .

Essential Job Duties

• Perform complete machine setups on CNC lathes with minimal supervision.
• Set up, operate, adjust, and troubleshoot CNC lathes to produce quality machined components.
• Read and interpret blueprints, engineering drawings, work instructions, and setup documentation.
• Understand and work with G-Code and M-Code programming.
• Set tooling, offsets, speeds, and feeds for various materials.
• Inspect parts using precision measuring equipment including micrometers, calipers, bore gauges, and other inspection tools.
• Make tool wear adjustments and minor program edits as needed.
• Troubleshoot machining issues and perform minor machine repairs or adjustments.
• Maintain quality standards and accurately complete required production documentation.
• Assist with training operators and less experienced setup personnel.
• Follow all safety procedures and wear required PPE at all times.

Required Experience & Skills

• Minimum 3 years of CNC lathe setup experience.
• Must be proficient performing complete setups on at least one of the following machines:
• Mori Seiki
• Haas
• Ganesh
• Index
• Citizen Swiss Lathes
• Strong blueprint reading skills.
• Working knowledge of G-Code and M-Code.
• Experience using precision measuring instruments.
• Strong mathematical and mechanical aptitude.
• Ability to troubleshoot machining and quality issues independently.
• Ability to work with minimal supervision while maintaining high quality standards.
• Must be able to read work instructions, SOPs, and technical documentation in English.

Preferred Qualifications

• Experience with Swiss-style CNC lathes.
• Experience with multiple CNC lathe brands.
• Ability to perform basic program edits and optimize machining processes.
• Experience training or mentoring machine operators.
• Strong attention to detail and commitment to continuous improvement.

Physical Requirements

• Must be able to lift up to 35 pounds regularly.
• Ability to stand for extended periods throughout the shift.
• Ability to safely perform repetitive bending, reaching, and lifting.
• Must wear required PPE, including safety glasses, steel-toe shoes, and hearing protection.

About Control Devices

Control Devices (CDI), an HBM Holdings company headquartered in Greater St. Louis, is a leading designer and manufacturer of engineered flow control solutions in the compressed gas, compressed air, oil & gas, and liquid controls markets. The company offers custom valves and flow control solutions for customers who place a premium on quality. Control Devices leverages operational excellence and flow control expertise to deliver trustworthy products and innovative solutions that protect life and our planet.

CDI offers competitive compensation, comprehensive benefits, paid time off, safety shoe and prescription safety glasses reimbursement, a casual work environment, and a strong 401(k) retirement plan.

Control Devices, LLC is an Equal Opportunity Employer. We provide equal employment opportunities to all employees and applicants without regard to race, color, religion, sex, age, national origin, disability, protected veteran status, sexual orientation, gender identity or expression, or any other protected characteristic under applicable federal, state, or local law.