About this opportunity
MANSFIELD METAL SOLUTIONS LLC lists this CNC Programmer / Machinist opportunity in corona, California. Review the employer’s description below for duties, qualifications and application requirements.
Job description
Job Description Job Description Role Overview
We are seeking a Principal CNC Programmer / Machinist to lead machining strategy, CNC programming, and complex process execution for aerospace and medical device components. This role is designed for a highly experienced professional who operates at the intersection of programming excellence, hands-on machining mastery, and shop-floor technical leadership.
This position is not a support role-it is a process owner role. The successful candidate will define how parts are machined, validate processes, resolve the most difficult manufacturing challenges, and serve as the highest level of machining and programming authority within the organization.
Core Responsibilities
CNC Programming & Process Ownership
Own CNC programming strategy for complex aerospace/medical device components from print review through production release
Develop, validate, and optimize CNC programs using CAM software and G-code
Define machining methodologies including sequencing, toolpaths, cutting strategies, and risk mitigation
Lead prove-outs, first-article runs, and process qualifications
Optimize cycle time, tool life, surface finish, and process capability
Machining & Setup Execution
Independently set up and run complex jobs on CNC mills and lathes, including:
Mills: Kitamura, Methods, Chevalier, Viper
Lathes: Takisawa, Hardinge, Yama Seiki
Design and implement advanced fixturing, workholding, and tooling solutions
Machine tight-tolerance, flight-critical components across a range of aerospace materials
Troubleshoot and resolve complex machining, tooling, and process issues
Technical Leadership & Standards
Serve as the primary subject matter expert for CNC programming and machining processes
Establish and maintain machining standards, setup documentation, and best practices
Provide technical guidance and mentorship to machinists and programmers
Support engineering, quality, and production teams with manufacturability input (DFM)
Participate in root cause analysis, corrective actions, and continuous improvement initiatives
Quality & Compliance
Ensure all machining processes meet AS9100, FAA, and customer requirements
Support first-article inspections, source inspections, and audit readiness
Apply advanced GD&T interpretation to real-world machining decisions
Required Qualifications
10+ years of experience in aerospace or similarly regulated, high-precision manufacturing
Expert-level CNC programming capability combined with hands-on machining experience
Extensive experience with both CNC milling and CNC turning
Advanced knowledge of GD&T and aerospace drawing interpretation
Proven track record machining and programming tight-tolerance, high-complexity components
Deep understanding of aerospace materials including aluminum, stainless steel, titanium, and nickel-based alloys
Strong mechanical intuition and structured problem-solving skills
Ability to operate with full autonomy and technical accountability
Preferred Qualifications
Advanced 5-axis milling and/or multi-axis turning experience
High proficiency with CAM software (Mastercam, Fusion 360, NX, or similar)
Experience supporting prototype, first-article, and low-volume/high-mix aerospace work
Prior involvement in PFMEA, process qualification, or manufacturing risk assessments
Experience supporting AS9100 audits or customer source inspections
What This Role Offers
Authority over CNC programming and machining strategy
Ownership of the most complex and critical aerospace/medical device work
Direct influence on process standards, tooling strategy, and shop capability
A quality-driven, engineering-aligned manufacturing environment
Compensation aligned with principal-level technical expertise
Education
High school diploma or GED required
Technical degree, formal apprenticeship, or equivalent advanced training strongly preferred
Work Environment
Precision aerospace/medical device manufacturing facility
Hands-on role requiring regular machine interaction
Ability to lift up to 50 lbs
Exposure to industrial machinery, cutting fluids, and metal chips
Worksite address
corona, CA, 92879, US
Who can apply
Review the original listing for work authorization, qualifications and employer requirements.