CNC Setup Machinist

B&B Manufacturing Co; California; On-site; USD 62,000 - 104,000; Full time

Job summary

B&B Manufacturing Co in Valencia, CA is seeking an experienced CNC machinist to set up and operate multi‑axis milling and turning machines. You will install tooling, fixtures, and programs, validate first articles, and ensure parts meet tight quality standards.

The role requires 5+ years in CNC machining, strong G-code knowledge, GD&T interpretation, and a track record of process improvement and mentoring teammates. This is a full-time on-site position in Valencia.

Qualifications

• 5+ years hands-on CNC precision machining experience in aerospace, defense, or medical sectors.
• Expertise in G-code, canned cycles, and in-process probing systems.
• Ability to read GD&T and manufacturing drawings to ensure tight tolerances.
• Proven track record mentoring machinists and driving continuous improvement.

Responsibilities

• Perform precision setups and operations on multi-axis CNC milling and turning machines.
• Collaborate with engineers to optimize processes and support automation and lights-out manufacturing.
• Read drawings, interpret GD&T, diagnose issues and implement corrective actions.

Skills

G-code

CNC machining

GD&T reading

Problem solving

Mentoring/leadership

Education

High School diploma or equivalent

Tools

CNC milling machines

CNC turning machines

In-process probing systems

G-code programming

Job description

Job Location: B B Manufacturing - Valencia, CA 91355 | Position Type: Full Time | Salary Range: $30.00 - $50.00 Hourly | Job Shift: Day

Job Summary

Responsible for performing precision setups and operations on multi-axis CNC milling and turning machines. In this role, you will prepare machines for production by installing tooling, fixtures, and programs, validating first-article parts, and ensuring parts meet strict quality and dimensional standards.

Essential Duties and Responsibilities

• Automation & Continuous Improvement
  • Collaborate with Programming and Manufacturing Engineers to optimize machining processes suitable for automation (robotic loading, in-process inspection & probing) to support lights-out manufacturing.
  • Apply continuous improvement principles to machining processes to improve efficiency, reduce lead times, and eliminate non-value-added activities.
• Quality & Problem Solving
  • Diagnose machining issues, perform root-cause analysis, and implement sustainable corrective actions.
  • Ensure adherence to tight tolerances using advanced inspection tools and techniques.
  • Read and interpret GD&T, engineering drawings, and 3D part models to ensure precision manufacturing.
• Training & Leadership
  • Develop and maintain detailed setup documentation, including setup sheets, tooling files, and manufacturing inspection plans.
  • Mentor and train less experienced machinists in setup techniques and process control.
  • Promote a culture of craftsmanship, accountability, and continuous improvement.

Qualifications, Experience and Education Requirements

• High School diploma or equivalent
• 5+ years hands‑on experience in CNC precision machining (aerospace, defense, or medical).
• Expertise in G-code, canned cycles, and in-process probing systems.
• Proven track record of machining tight‑tolerance parts using aluminum, steel, and aerospace‑grade alloys.
• Understanding of metal behavior & mechanics in a machining environment (chip formation, vibration, distortion, heat transfer, etc.)
• Understanding of cutting tool geometry, fixture design, and tool life management.
• Ability to interpret GD&T and manufacturing drawings.
• Proven ability to diagnose and resolve complex machining issues independently — from chatter and tool wear to dimensional instability and setup inefficiencies.
• Experience with standard MS Office tools (Excel, Outlook).

Physical Demands

• General Activities
  • Regularly Sitting
  • Frequently Standing
  • Occasionally Walking, Climbing/Balancing, Reaching with arms and hands, Stooping/Kneeling/Crouching/Crawling
  • Regularly Hearing, Feeling/Touching, Near/Far Visual Acuity
• Lifting Requirements
  • Regularly Lifting/Moving up to 10 lbs
  • Frequently Lifting/Moving up to 25 lbs
  • Occasionally Lifting/Moving up to 50 lbs

Regulatory Compliance

This position requires use of information which is subject to the International Traffic in Arms Regulations (ITAR). All applicants must be U.S. persons within the meaning of ITAR. ITAR defines a U.S. person as a U.S. Citizen, U.S. Permanent Resident (i.e. "Green Card Holder"), Political Asylee, or Refugee.

EEO Statement

"B&B Manufacturing Co. is an Equal Opportunity/Affirmative Action employer and all qualified applicants will receive consideration without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, protected veteran or disability status, or any other characteristic protected by law."