Principal Machinist

WHAT WE DO AND WHO WE ARE

At Yamaha Marine Precision Propellers, we work as a team to manufacturer boat propellers using an investment casting process. We make high quality products while supporting our teams and local communities by providing great careers in a safe, respectful, and innovative environment.

POSITION PURPOSE

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.

ESSENTIAL DUTIES AND 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.

REQUIRED SKILLS AND ABILITIES

• 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

EDUCATION/EXPERIENCE REQUIREMENTS

• 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

Preferred

• Multi-axis CNC machining experience

• CAM programming experience

• Experience mentoring or leading machinists

• Industry experience in [aerospace, defense, medical, automotive, industrial manufacturing, etc.]

Additional Information

• All candidates will be subject to full background screening prior to employment.

WHAT YOU'LL LOVE ABOUT US

• Learning & Development: Tuition assistance is available along with an internal training budget. Get with a hands-on company, in a fast-paced environment where you can have the runway to make change.
• Rest & Relaxation: 12 paid holidays off per year on top of a generous vacation policy.
• Great company culture: Work for a company that genuinely values work/life balance.
• Health Benefits: Medical with HSA options, Dental, and Vision starting first day of the month following date of hire.
• Prepare for the Future: Competitive 401(k) with company match.
• Innovative Environment: Work with a team dedicated to pushing the boundaries of investment casting technology.
• Growth Opportunities: Opportunities for professional development and career advancement within a growing company.

Client-provided location(s): Greenfield, IN

Job ID: Yamaha-6bc6e331-411d-43c5-bdb2-c6ae952c687c

Employment Type: FULL_TIME

Posted: 2026-05-01T18:38:10