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Callum Briggs

CNC Machinist
Detroit, MI, United States

Professional Summary

Precision CNC Machinist with 10+ years of experience programming, setting up, and operating 3-, 4-, and 5-axis mills and CNC lathes for automotive and aerospace suppliers. Expert in G-code/M-code, Fanuc controls, Haas and Mazak platforms, and tight-tolerance production to ±0.0005 inches. Known for disciplined CMM, micrometer, and first-article inspection practices that reduce scrap while protecting throughput and customer quality. Safety-focused team lead who supports fixture design, Lean/5S improvements, and hands-on training for developing machinists.

Employment History

CNC Machinist
Precision Forge Machining · Detroit, MI
2021 · Present
• Set up and operate multi-axis Haas and Mazak mills and CNC lathes with Fanuc controls for Tier-1 automotive components, holding ±0.0005" tolerances across repeat production runs. • Program and edit G-code/M-code, prove out new jobs, and optimize feeds, speeds, and tool paths to improve cycle time by 14% while maintaining first-pass quality. • Partner with engineering on fixture design assists, workholding improvements, and process trials for complex 3- and 5-axis parts. • Use CMMs, micrometers, calipers, and gauges for in-process and final inspection; cut recurring scrap 22% through tighter setup checklists and SPC reviews. • Coach and train 6 junior machinists on setup documentation, offsets, tool management, blueprint interpretation, and safe machine operation. • Lead daily 5S and lockout/tagout practices while documenting nonconformances and corrective actions for customer audits.
CNC Operator / Machinist
Great Lakes Tool & Die · Warren, MI
2017 · 2021
• Ran high-volume CNC milling and turning production for dies, fixtures, and launch-program components, consistently meeting daily schedules above 98% on-time completion. • Monitored tool wear, offsets, coolant condition, and spindle load to prevent defects and extend insert life by 18%. • Completed first-article inspection and in-process checks from blueprints using calipers, micrometers, gauges, and CMM reports before releasing lots. • Supported overtime and weekend coverage during automotive launch programs, helping the team ramp two new part families without missed customer milestones. • Read GD&T callouts, updated setup sheets, and collaborated with quality and maintenance teams on root-cause investigations and corrective actions.
Apprentice Machinist
Midwest Metal Fab · Dearborn, MI
2014 · 2017
• Learned mill and lathe setup, basic CNC operation, tooling, deburring, and preventive maintenance under senior machinist mentorship. • Read shop blueprints and GD&T basics, performed shop math and measurement conversions, and verified dimensions with calipers, micrometers, and height gauges. • Supported short-run and prototype work by staging material, setting tool offsets, changing inserts, and documenting inspection results. • Completed OSHA-aligned safety training, lockout/tagout instruction, PPE checks, and daily 5S housekeeping across the machine shop. • Progressed to independent operation of manual mills and lathes and assisted with CNC setup changeovers while meeting quality and attendance goals.

Education

Associate of Applied Science — Machine Tool Technology
Macomb Community College · Warren, MI
2012 · 2014
Coursework in CNC programming, machine tool processes, precision measurement, blueprint reading, GD&T, metallurgy, and manufacturing safety. Completed NIMS-aligned CNC Milling training and journey-level shop competencies.

Skills

Mastercam
G-code
GD&T
CMM
Blueprint