Senior Machinist

The Senior Machinist is responsible for independently setting up, operating, and troubleshooting CNC milling and related machining equipment to produce precision parts that meet engineering specifications and production requirements. This role also supports manufacturing and engineering by creating and maintaining internal shop drawings using SolidWorks, and by quoting new machining jobs through evaluation of prints, materials, tooling, and estimated labor. The Senior Machinist serves as a technical expert on the shop floor and provides guidance to junior machinists.

Key Responsibilities

• Set up, operate, and troubleshoot CNC milling machines and related equipment to manufacture precision components.
• Interpret complex engineering drawings, blueprints, GD&T, routings, and work instructions.
• Create, modify, and maintain internal shop drawings using SolidWorks to support machining, setups, fixtures, and manufacturing processes.
• Translate engineering designs into clear, practical shop‑level documentation to improve consistency, quality, and efficiency.
• Select appropriate tooling, fixtures, and machining strategies to meet tolerance, quality, and cycle‑time requirements.
• Perform routine in‑process dimensional checks using precision measuring instruments (calipers, micrometers, height gauges, etc.) to ensure ongoing conformance during production.
• Troubleshoot machining, tooling, and process issues; implement corrective actions and recommend improvements.
• Prepare quotes for new machining jobs by reviewing customer or engineering drawings and estimating labor hours, machine time, materials, tooling, and process complexity.
• Collaborate with Engineering, Quality, and Production teams to support NPI, prototypes, and design‑for‑manufacturability (DFM) efforts.
• Mentor and train junior machinists and operators on CNC milling setups, machining techniques, drawing interpretation, and best practices.
• Ensure compliance with safety requirements, 5S standards, and company procedures.
• Maintain accurate documentation, including setup sheets, work instructions, and revision‑controlled shop drawings.
• Support continuous improvement initiatives related to scrap reduction, process capability, and production efficiency.
• Assist with machine maintenance and recommend tooling, fixture, or process enhancements.

Required Qualifications

• High school diploma or GED required; technical or trade school training preferred.
• 7+ years of machining experience in a manufacturing environment.
• Strong experience with CNC milling operations.
• Proficiency with SolidWorks for creating and updating internal shop or manufacturing drawings.
• Demonstrated ability to estimate machining time and cost for quoting purposes.
• Strong ability to read and interpret complex blueprints and GD&T.
• Proven capability to independently complete CNC mill setups and machining operations.
• Solid understanding of machining principles, materials, feeds, speeds, and tolerances.
• Experience using precision measuring tools for in‑process verification.
• Ability to work with minimal supervision and manage multiple priorities

Preferred Qualifications

• CNC programming experience for milling machines (G‑code, conversational controls)
• Experience supporting New Product Introduction (NPI) or prototype builds.
• Experience developing fixtures, tooling concepts, or manufacturing aids for milling operations.
• Lean manufacturing or continuous improvement experience.

Skills & Competencies

• High attention to detail and commitment to quality
• Advanced problem‑solving and troubleshooting skills
• Ability to translate engineering intent into practical shop solutions
• Effective communication across Engineering, Quality, and Production
• Time management and ability to meet production schedules
• Commitment to safety and operational excellence

Physical Requirements & Work Environment

• Ability to stand for extended periods and lift up to [insert weight, e.g., 50 lbs].
• Frequent use of hands for fine manipulation and machine operation.
• Exposure to a manufacturing environment including noise, coolants, and metal chips.
• Required use of PPE per company safety policies.

About UsThis amount is what we reasonably believe we will pay for the position; however, offer amounts may vary based on factors such as geographic location, relevant education, experience, qualifications, skills, shift, or any collective bargaining agreements. For eligible positions, compensation may include participation in a bonus or sales incentive plan, subject to the terms and conditions of the applicable plan documents. For certain sales roles, Wesco also offers a commission structure that provides additional compensation based on sales results, as defined by the applicable commission plan. About the TeamAt Wesco, we build, connect, power and protect the world. As a leading provider of business-to-business distribution, logistics services and supply chain solutions, we create a world that you can depend on. ​ Our Company’s greatest asset is our people. Wesco is committed to fostering a workplace where every individual is respected, valued, and empowered to succeed. We promote a culture that is grounded in teamwork and respect. With a workforce of over 20,000 people worldwide, we embrace the unique perspectives each person brings. Through comprehensive benefits and active community engagement, we create an environment where every team member has the opportunity to thrive.  ​ Learn more about Working at Wesco here and apply online today!​ Founded in 1922 and headquartered in Pittsburgh, Wesco is a publicly traded (NYSE: WCC) FORTUNE 500® company.​ Wesco International, Inc., including its subsidiaries and affiliates (“Wesco”) provides equal employment opportunities to all employees and applicants for employment. Employment decisions are made without regard to race, religion, color, national or ethnic origin, sex, sexual orientation, gender identity or expression, age, disability, or other characteristics protected by law. US applicants only, we are an Equal Opportunity Employer.​Los Angeles Unincorporated County Candidates Only: Qualified applicants with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance and the California Fair Chance Act.