CNC Prototype Machinist

Job Description

We are seeking an experienced CNC Prototype Machinist to join our machine shop team. Under general supervision, develops, writes, and edits programs that direct automated machine tools to cut and shape precision metal parts, tools, and products. Additionally, sets up and operates CNC and manual machining equipment to product prototype components and precision parts. Uses blueprints, CAD data, and engineering sketches to ensure all specifications, dimensions, and tolerances are met. Works closely with engineers and production staff to refine designs for manufacturability, accuracy, and efficiency in prototype and limited-run production environments.

Key Responsibilities

Analyze job orders, blueprints, CAD data, and engineering documentation to determine machining operations, sequences, and dimensions.

Write, test, and revise CNC programs to control machining or processing of metal or plastic parts.

Select and set up appropriate tooling, fixtures, and machining parameters such as cutting speeds, feed rates, and depths of cut.

Operate CNC and manual machine tools (vertical mills, horizontals, lathes, grinders, etc.) to fabricate prototype and production components.

Review and interpret blueprints, CAD models, and specifications to ensure compliance with dimensional and tolerance requirements.

Calculate dimensions and tolerances using precision instruments such as micrometers, calipers, and height gauges.

Inspect finished products to verify accuracy and quality using precision measuring tools and visual inspection techniques.

Perform setups, adjustments, and minor maintenance on machinery as needed to maintain accuracy and efficiency.

Simulate or test programs to ensure that machinery functions properly and meets engineering requirements.

Prepare setup sheets, documentation, and process notes for repeatability and training.

Collaborate closely with engineers, machinists, and production staff to optimize prototype manufacturability and machining processes.

Maintain knowledge of evolving CNC control systems, programming languages, and machining technology.

Train or provide technical guidance to machinist and operators as needed.

Qualifications

CNC programming (Proficiency with Fanuc/Haas controls)

CAD/CAM software proficiency (Proficiency in Fusion 360, or similar software)

Setup and operation of CNC and manual machine tools

Precision measurement and quality inspection

Blueprint reading, mechanical drafting, and GD&T interpretation

Knowledge of machining materials and processes (metals, plastics, composites) Must have basic understanding of office administration.

Strong organizational and time management skills

Critical thinking and problem-solving ability

Works independently with minimal supervision

Effective written and oral communication

Adaptable and able to multitask under changing priorities

Team-oriented, collaborative approach with engineers and peers

Continuous learning mindset with focus on innovation and accuracy

Associate’s degree or technical certificate in manufacturing technology, machine tool technology, or related field.

5-7 years of combines CNC programming and machining experience, ideally in prototype or low-volume environments.

NIMS or equivalent credentials are desirable.

Industries: Aerospace, automotive, metal fabrication, precision tooling and prototyping sectors.

Physical & Environmental Conditions

Most functions are performed indoors.

Temperature variation reasonably controlled by heaters and fans.

Occasional exposure to moving mechanical parts.

Occasional risk of electrical shock and vibration.

Noise level is usually loud.

Safety glasses are provided and required when working in restricted areas.

Equipment

CNC mills, horizontals, lathes, and multi-axis machining centers

Manual mills, lathes, and grinders

CAD/CAM software and simulation tools (Fusion 360)

Precision measuring instruments (micrometers, calipers, gauges, CMM)

Hand tools, fixtures, vises, and inspection equipment

Computers and CNC control interfaces.

Compensation details: Yearly Salary

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Full-time