Uriel Sierra
Thousand Oaks,CA
Summary
Skilled CNC Machinist and Programmer with over 10 years of experience in AS9100-compliant machine shops, specializing in CNC lathe operations, programming, and precision part production. Experienced in mentoring new employees, troubleshooting machining issues, and ensuring efficient production workflows. Highly skilled yet always eager to learn, with a proven track record of delivering high-quality results in fast-paced manufacturing environments.
Overview
11
11
years of professional experience
Work History
CNC Lathe Programmer
Commercial and Aerospace
Simi Valley, CA
04.2021 - Current
- Program and optimize CNC lathe operations by interpreting blueprints, planning machining processes, and writing G-code/M-code programs for new parts. Determine optimal speeds, feeds, and tooling based on material properties and part specifications.
- Manage tool inventory, and design, program, and machine custom fixtures and gauges to support unique part requirements.
- Create a comprehensive setup sheet for operators and setup machinists, detailing program numbers, tooling requirements, cycle times, and step-by-step instructions to streamline part production. Maintain a database of CNC programs for repeat parts, ensuring quick retrieval.
- Collaborate with CNC mill programmers to coordinate machining processes for parts requiring multi-axis operations.
CNC Lathe Set-up
Canady Manufacturing
San Fernando, CA
08.2018 - 12.2020
- Set up and operated multiple CNC lathe machines simultaneously, ensuring efficient production, meeting deadlines, and maintaining high-quality standards while multitasking effectively.
- Conducted thorough inspections of machined parts using precision measuring tools to verify dimensions, tolerances, and quality before submitting them for first-article inspection.
- Edited existing G-code programs for improved functionality and performance.
Inspector in Quality Assurance and Quality Control
Hydromach Inc.
Chatsworth, CA
02.2016 - 07.2018
- Performed First Article Inspections (FAI) by reviewing and "bubbling" blueprints, collecting part measurement data, and documenting results in compliance with AS9100 standards.
- Verified specialized processes, such as anodizing and heat treatment, by reviewing certifications and ensuring parts met required specifications before proceeding to the next stage.
- Managed calibration and records of precision measuring tools, ensuring all equipment met compliance requirements.
CNC Lathe Operator
DG Engineering
Sylmar, CA
11.2013 - 02.2016
- Maintain accurate records of production data, including quantity produced, and rejected parts.
- Set up and operate CNC lathes to perform various machining operations such as turning, facing, boring, threading, and drilling.
- Test completed workpieces for conformance to specified tolerances using measuring instruments, such as calipers, micrometers, and gauges.
- Trained and mentored new employees on the proper use of precision measuring tools, CNC lathe machine operation, and adherence to quality and safety standards.
Education
Bachelor of Science - Business Administration
California State University, Northridge
Northridge, CA06-2020
CNC Machinist
North East Valley Occupational Center
San Fernando, CA01-2016
Skills
- Precision measuring tools: Micrometers; Thread gauge/mic; Calipers; Height Gauge; Comparator; CMM etc
- G-code/M-code programming
- Computer proficient
- Operator training
- Multi-tasker; operates multiple machines
- Experienced with FANUC; HAAS; OKUMA controls
- Work with close tolerances ex /-0003
- Bilingual: English and Spanish
Timeline
CNC Lathe Programmer
Commercial and Aerospace
04.2021 - Current
CNC Lathe Set-up
Canady Manufacturing
08.2018 - 12.2020
Inspector in Quality Assurance and Quality Control
Hydromach Inc.
02.2016 - 07.2018
CNC Lathe Operator
DG Engineering
11.2013 - 02.2016
Bachelor of Science - Business Administration
California State University, Northridge
CNC Machinist
North East Valley Occupational Center
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