Principal Machinist

Yamaha Motor Corporation, USA•Greenfield, IN

10h•Onsite

About The Position

The Principal Machinist is a senior technical expert responsible for producing complex, high-precision components and serving as a subject matter expert within machining operations. This role provides advanced troubleshooting, process improvement, and technical leadership while supporting safety, quality, and production objectives.

Requirements

Mastery of manual and CNC machining (mills, lathes, grinders, multi‑axis equipment)
Expert ability to read and interpret complex blueprints, GD&T, and technical drawings
Advanced knowledge of tooling selection, fixturing, and cutting parameters and able to implement
Deep understanding of materials (steel, aluminum, alloys, castings) and machining behavior and able to select best machining practices
Ability to program, set up, and troubleshoot CNC machines (G‑code and/or CAM systems)
Performs complex, tight‑tolerance work with minimal supervision
Strong understanding of dimensional inspection methods and metrology tools
Strong understanding of dimensional inspection methods and Ability able to verify parts using CMMs, micrometers, calipers, indicators, and gauges
Maintains strict adherence to quality standards, tolerances, and specifications
Able to identify and correct process variation before defects occur
Expert at troubleshooting machining, tooling, and process issues and providing solutions
Supports root‑cause analysis for scrap, rework, and downtime
Drives process optimization, cycle time reduction, and efficiency improvements
Contributes to Lean manufacturing and continuous improvement initiatives
Serves as a technical leader and subject‑matter expert on the shop floor
Mentors and trains journeyman machinists, apprentices, and operators
Provides guidance on best practices, safety, and quality expectations
Leads by example in workmanship, accountability, and professionalism
Strong commitment to shop safety standards and safe work practices
Identifies hazards and proactively supports risk reduction efforts
Ensures compliance with company policies and regulatory requirements
Role model for safe equipment use and proper PPE
Works closely with engineering, quality, maintenance, and supervision
Communicates technical issues and solutions clearly and effectively
Provides feedback on design for manufacturability (DFM)
Supports production planning and scheduling needs
Highly reliable, disciplined, and detail‑oriented
Manages priorities in a fast‑paced manufacturing environment
Demonstrates strong ownership, pride in craftsmanship, and accountability
Continuously seeks to expand skills and technical knowledge
High school diploma or equivalent (technical certification or apprenticeship preferred or equivalent)
10+ years of progressive machining experience, including complex part manufacturing
Advanced knowledge of CNC machining and/or precision manual machining. CNC certification preferred.
Strong proficiency in GD&T and precision measurement tools. Certification preferred.
Demonstrated ability to independently solve complex machining challenges
Strong attention to detail and commitment to quality and safety

Nice To Haves

Multi-axis CNC machining experience
CAM programming experience
Experience mentoring or leading machinists
Industry experience in [aerospace, defense, medical, automotive, industrial manufacturing, etc.]

Responsibilities

Set up, program (as applicable), and operate advanced CNC and/or manual machining equipment to manufacture complex, tight-tolerance parts
Serve as the technical authority on machining methods, tooling, fixturing, materials, and feeds/speeds using industry best practices.
Interpret complex engineering drawings, CAD models, and GD&T requirements
Troubleshoot machining, tooling, and quality issues; implementing corrective actions.
Perform routine machine maintenance including tool room 6S.
Support process optimization, cycle time reduction, and scrap reduction initiatives
Mentor and provide technical guidance to machinists and apprentices
Collaborate with Engineering, Quality, and Manufacturing teams on new product introduction and continuous improvement
Ensure compliance with safety standards, quality systems, and company policies
Participate in root cause analysis and corrective/preventive action efforts and implementing innovative machining methods.