Senior Machinist - Tooling and Fabrication

Join ATC Automation as a Senior Machinist located in Simi Valley, CA

We are seeking a skilled Senior Level Machinist to join our Tooling and Fabrication team in Simi Valley, CA. In this role, you will set up and operate conventional and specialized machining equipment to fabricate metallic and non‑metallic parts, program and operate CNC machines, Hybrid CNC Mill, Manual Mill, Lathe, grinders and bandsaws, and other machine shop equipment based on project needs.

This position requires strong knowledge of machine shop practices, materials, tooling, and layout techniques.

We offer a competitive hourly rate ranging from $35–$40 depending on experience, coupled with benefits including Medical, Dental, Vision, 401(k), Life Insurance, Health Savings Account, Flexible Spending Account, Competitive Salary, and Paid Time Off. Join a forward‑thinking culture that thrives on professional growth.

Since 1977, ATC has been redefining what’s possible in industrial automation. From concept to commissioning, we partner with leading brands across the globe to design and deliver custom machinery that drives efficiency, precision, and long‑term performance. Our automation expertise spans critical industries that shape the way we live and move – Life Science, Transportation, Consumer Products, and General Industry.

• Read and interpret engineering drawings and specifications to determine part dimensions and tolerances.
• Program, set up, and operate HAAS CNC machines and Hybrid CNC M ill.
• Set up and operate lathes, mills, and other conventional and manual machinery.
• Machine and grind components to precise specifications.
• Select or design, fabricate, and install appropriate fixtures, cutting tools, and accessories.
• Calculate proper speeds and feeds based on material type and tooling.
• Use precision measuring instruments (e.g., micrometers, calipers, height gauges) to verify part accuracy.
• Use computers to locate files, print drawings, and inspect 3‑D models using tools like eDrawings.
• Have a minimum of 5 years CAD/CAM experience (Master CAM or Rhino CAM a plus).
• Perform work assignments from the Working Foreman and collaborate with the team as needed.

• Ability to stand for extended periods.
• Lift and move objects weighing up to 50 lbs occasionally, 25 lbs frequently, and 10 lbs constantly.
• Use hands and fingers to handle or feel materials and tools.
• Ability to bend, push, pull, and reach overhead.

• High noise levels from operating machinery.
• Exposure to physical hazards such as moving machine parts.
• Exposure to fumes, dust, mist, oils, and fluids.

• High school diploma or equivalent.
• 7–10 years of hands‑on machining experience (manual machining or similar).
• 5–8 years of hands‑on CNC programming and operating experience.

• Vocational or technical certification in machining.
• 5–10 years of experience in a machining or fabrication environment.
• Exceptional math and mechanical aptitude.
• Clear written and verbal communication skills.
• Highly skilled with blueprint reading and 3‑D model interpretation.
• Team‑oriented mindset and strong problem‑solving skills.
• Ability to plan, multitask, and perform under pressure.

• Effective communicator – both written and verbal.
• Positive and professional demeanor.
• Reliable attendance and punctuality.
• Able to follow directions and work independently or as part of a team.
• Organized and detail‑oriented.
• Ability to work efficiently in a fast‑paced environment.
• Willingness to perform other duties as assigned by management.

• Strong understanding of feeds and speeds for various tools, including endmills, drills, reamers, shell mills.
• Ability to estimate machining times for both very basic profile parts and more complex parts made from stainless steel or other hard materials.

This job description has been designed to indicate the general nature and level of work performed by employees within this classification. It is not intended to contain or be interpreted as a comprehensive inventory of all duties, responsibilities, and qualifications…