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Theo Lang

CNC Machinist
Grand Rapids, MI, United States

Professional Summary

Precision CNC and manual machinist with 8+ years producing aerospace, defense, and automotive components to tight tolerances. Daily work spans 3–5-axis Haas and Mazak cells, Fanuc and Mazatrol programming, and complete job setups from GD&T prints. Known for holding ±0.0005" on critical features, cutting scrap through fixture redesign and in-process gauging, and keeping first-pass yield high. Brings a strong safety and quality culture, mentors junior machinists, and treats 5S, lean changeover, and accurate inspection as part of the job, not extras.

Employment History

CNC Machinist (Senior)
Precision Forge Machining · Grand Rapids, MI
Jan, 2021 · Present
Run 3–5-axis Haas and Mazak cells producing aerospace and defense parts from aluminum, stainless, and titanium, holding critical features to ±0.0005". Program and edit Fanuc and Mazatrol at the machine; prove out new jobs and revise offsets so first articles pass inspection. Cut scrap about 18% by redesigning fixtures and adding in-process gauging on high-volume features. Mentor two junior machinists on setups, tool life, and documentation; first-pass yield on assigned cells rose after standardized prove-out checks. Support AS9100-style traceability, tool crib control, and daily safety walks on the aerospace cell.
CNC Machinist
Lakeshore Tool & Die · Holland, MI
Mar, 2017 · Dec, 2020
Produce tooling, fixtures, and production parts on CNC mills and lathes for automotive and industrial customers. Read GD&T prints, set up jobs from blueprints, and dial in offsets, workholding, and feeds before releasing the first piece. Cut changeover time about 25% by building standardized tool libraries and presetting common cutters for repeat jobs. Support in-process inspection with micrometers, bore gauges, and height stands; flag out-of-tolerance features before they leave the cell.
Machine Operator / Apprentice Machinist
West Michigan Fabrication · Muskegon, MI
Jun, 2014 · Feb, 2017
Ran manual mills and lathes and entry-level CNC cycles for fabrication and simple production parts. Completed apprenticeship coursework in machine tool technology, shop math, blueprint reading, and safe machine operation. Followed lockout, PPE, and 5S rules on the floor; learned carbide tooling basics, deburr, and first-piece checks under a journeyman.

Education

Associate of Applied Science, Machine Tool Technology
Grand Rapids Community College · Grand Rapids, MI
2014 · 2016
NIMS Machining Level I (Milling & Turning)
National Institute for Metalworking Skills
OSHA 10; Forklift Certified
Occupational Safety and Health Administration

Skills

Haas CNC
Mazak
Fanuc, Mazatrol, Mastercam (basic), GD&T, blueprint reading, micrometers/CMM, 5S, lean shop practices, carbide tooling