CNC Machinist (Machinist III) – Mills, Lathes & Waterjet

Updated November 10, 2026

🔍 At a glance

Company: General Plastics & Composites, LP
Location: Houston, TX 77075
Pay: Competitive, based on experience
Job Type: Full-time
Shift: 6am–6pm or 6pm–6am
Experience: Senior-level, 7+ years on manual and/or CNC machines
Department: Ledbetter Machining
Machines: Manual lathes and mills, CNC lathes and mills, Waterjet
Controls: G-code, M-code and Mazatrol; GD&T

Why this job is worth considering

General Plastics & Composites is hiring a Machinist III for its Ledbetter Machining department in Houston, Texas. This is the senior machinist role: you set up, run and troubleshoot complex machine tools to produce precision parts within tight tolerances, with minimal supervision.

You may also help train junior machinists, lead improvement initiatives and work with the engineering and quality teams to resolve technical issues. It fits a machinist with seven or more years on manual or CNC machines.

What you'll be doing

• Set up and run manual lathes, manual mills, CNC lathes, CNC mills and Waterjet machines for production and engineering parts, with minimal to no assistance
• Set up, run and troubleshoot complex machine tools to hold tight tolerances
• Read and interpret advanced blueprints, engineering drawings and technical specifications
• Create and edit CNC programs
• Set up and configure machine fixturing, and verify gage calibration
• Help train junior machinists and lead improvement initiatives
• Work with the engineering and quality teams to resolve technical issues
• Perform preventative maintenance per the company PM program
• Follow all engineering instructions, standard operating procedures and departmental procedures
• Keep the work area and equipment clean and orderly and follow all prescribed safety regulations
• Assist other departments as needed with management approval
• Other duties as assigned

Machines, controls and software

• Machines: manual lathes, manual mills, CNC lathes, CNC mills, Waterjet
• Controls and programming: CNC programming languages (G-code, M-code and Mazatrol), including creating and editing programs
• Quality: thorough knowledge of Geometric Dimensioning and Tolerancing (GD&T)
• Measuring tools: micrometers (OD and ID), calipers, bore gages, protractors, height gages, micro-height gages, molds, optical comparators, depth gages

What we're looking for

Required

• 7+ years of experience working with manual and/or CNC machines
• High school diploma or GED
• Able to interpret blueprints, engineering drawings and technical documentation
• Thorough knowledge of GD&T and CNC programming (G-code, M-code and Mazatrol)
• Strong math skills and proficiency with handheld measuring tools
• Knowledge of machine safety practices, job orders and production processes
• Able to follow written and verbal instructions in English
• Reliable attendance, professionalism and teamwork

Physical requirements and shop environment

• Stand for extended periods, walk, use your hands to handle or feel, and reach with hands and arms
• Frequently lift or move up to 50 pounds, and occasionally up to 100 pounds with assistance
• Work in a shop environment that can include hot or cold temperatures, humidity, high noise levels and hazardous fluids such as coolants and lubricants
• Machine and handle a wide variety of materials, including fiberglass composites, plastics, metals and other alloys

Pay, benefits and schedule

• Full-time, Monday through Friday
• Shift: 6am–6pm or 6pm–6am
• Pay: competitive, based on experience
• Benefits: medical, dental and vision, 401(k), and paid time off and holidays

About General Plastics & Composites and apply

General Plastics & Composites, LP (GP&C) is a Houston manufacturer with a quality system certified by DNV to AS9100 and ISO 9001:2015. Every employee is expected to follow its Quality, Health, Safety and Environmental (QHSE) protocols, take part in its QHSE culture, take pride in their work and look for ways to improve processes.

Apply directly through hireCNC. Your application goes to the GP&C HR team.

GP&C is an Equal Opportunity Employer. We are committed to providing equal employment opportunities in all employment practices, without regard to race, color, religion, gender, national origin, marital status, age, veteran's status, disability, sexual orientation, or any other characteristic protected by law.