Senior CNC Machinist (Machinist III)

Company: General Plastics and Composites LP
Location: Houston
Posted on: January 9, 2026

Job Description:

Senior CNC Machinist (Machinist III) Houston, TX | Full-Time | Day or Night Shift General Plastics & Composites, LP is hiring a Senior CNC Machinist (Machinist III) to join our Flex Machining team in Orem, Utah . This is a high-skill, senior-level machining role for an experienced machinist who can handle complex setups, CNC programming, troubleshooting, and precision work with minimal supervision. This position is ideal for a machinist who enjoys challenging work, mentoring others, and working closely with engineering and quality teams to solve technical problems. What You’ll Do As a Machinist III , you will be responsible for advanced machining operations including: Set up, operate, and troubleshoot CNC mills, CNC lathes, manual mills, manual lathes, and waterjet machines Perform complex machining for production and engineering / prototype parts Read and interpret advanced blueprints, engineering drawings, and technical specifications Create, edit, and optimize CNC programs using G-code and Mazatrol Hold tight tolerances and ensure high-quality parts meet all specifications Perform preventative maintenance per company PM programs Maintain a clean, organized, and safe work environment Assist in training and mentoring junior machinists and operators Collaborate with engineering and quality teams to resolve machining and process issues Follow all engineering instructions, SOPs, and safety procedures Required Technical Skills You should have strong working knowledge of: CNC Machining & Programming CNC mill and CNC lathe setup and operation CNC programming using G/M codes and Mazatrol Program creation, editing, and troubleshooting Machine fixturing and tooling selection Machine safety and lubrication practices Measurement & Inspection Micrometers (OD & ID) Calipers Bore gauges Height gauges & micro-height gauges Optical comparator Depth gauges Protractors Mold inspection tools Gauge calibration verification GD&T (Geometric Dimensioning & Tolerancing) Qualifications 7 years of experience working with CNC and/or manual machines Proven experience with complex setups and programming Ability to follow written and verbal instructions in English Strong math skills and precision measurement ability High school diploma or GED required Ability to work independently with minimal supervision Strong teamwork, reliability, and professionalism Physical & Work Environment Ability to stand for extended periods Frequent lifting up to 50 lbs , occasional lifting up to 100 lbs with assistance Work in a shop environment with varying temperatures, noise, and machining fluids Comfortable machining a wide range of materials, including: Plastics Fiberglass composites Metals and alloys Schedule & Employment Details Shift Options: Day Shift: 6:00 AM – 6:00 PM Night Shift: 6:00 PM – 6:00 AM Schedule: Monday – Friday Employment Type: Full-Time FLSA Status: Non-Exempt Department: Flex Machining Reports To: Supervisor About General Plastics & Composites, LP General Plastics & Composites is committed to quality, safety, and continuous improvement . We expect all team members to actively support our QHSE culture , take pride in their craftsmanship, and contribute to ongoing process improvements. Equal Opportunity Employer GP&C provides equal employment opportunities to all applicants and employees.

Keywords: General Plastics and Composites LP, Houston , Senior CNC Machinist (Machinist III), Engineering , Houston, Texas