CNC Programmer

McCay Tool & Engineering; St. Louis (MO); On-site; USD 70,000 - 110,000; Full time

Job summary

McCay Tool & Engineering in St. Louis, MO, seeks an experienced CNC programmer to design and optimize programs for 3-, 4-, and 5-axis machines using Mastercam and NX. They will work with aerospace-grade tolerances and GD&T.

Responsibilities include tooling/fixture selection, improving cycle times, supporting first-article checks, and ensuring AS9100 and customer spec compliance.

Qualifications

• Minimum of 3–5 years CNC programming experience in a precision manufacturing environment (aerospace or defense preferred).
• Strong knowledge of G-code/M-code editing.
• Experience with multi-axis machining (3–5 axis) and tooling selection.
• AS9100 quality standard familiarity.
• Blueprint reading and GD&T interpretation.

Responsibilities

• Create and optimize CNC programs for multi-axis mills and lathes using CAM software (NX & Mastercam).
• Interpret aerospace blueprints, GD&T, and 3D CAD models.
• Define tooling, fixtures, and cutting parameters to maximize efficiency and minimize tool wear.
• Collaborate with machinists on setups, troubleshoot on the floor, and verify first-article components.
• Ensure programs align with AS9100 standards and customer specifications.

Skills

CNC programming

GD&T understanding

Multi-axis machining

Quality compliance

Tools

Mastercam

NX

Job description

• Program Development: Create and optimize efficient CNC programs for multi-axis CNC mills and lathes utilizing CAM software. (NX & Mastercam)
• Blueprint & Model Analysis: Interpret complex aerospace blueprints, geometric dimensioning and tolerancing (GD&T), and 3D CAD models.
• Process Optimization: Define appropriate tooling, fixtures, cutting speeds, and feeds to maximize efficiency, reduce cycle times, and minimize tool wear.
• First-Article Support: Collaborate with machinists on initial setups, troubleshoot program errors on the floor, and verify first-article components.
• Quality & Compliance: Ensure all programs align with strict internal quality standards, AS9100 regulatory frameworks, and customer specifications.
• Experience: Minimum of 3-5 years of dedicated CNC programming experience within a precision manufacturing environment (aerospace or defense preferred).
• Software Proficiency: Strong hands‑on experience with Mastercam, NX, or equivalent industry‑standard CAM software.
• Technical Skills: Expert knowledge of G-code/M-code editing, blueprint reading, and precise application of GD&T symbols.
• Machining Knowledge: Solid understanding of multi‑axis machining (3, 4, or 5‑axis setup), cutting tools, material properties (titanium, aluminum, stainless steel), and work‑holding solutions.

Pre-employment background and drug screen required.