Senior Mechanical Design Engineer

ATC Automation is seeking a hands‑on and innovative Senior Mechanical Design Engineer to lead the mechanical development of custom automation machinery and tooling systems at our Simi Valley, CA location. Remote opportunities may be considered for highly qualified candidates, with occasional travel required to Simi Valley. Projects range in scale and complexity, from rapid R&D initiatives to fully integrated, high‑throughput production equipment.

You will work directly with customers to define requirements and collaborate with a multidisciplinary engineering team to deliver robust, high‑performance automation solutions. With a competitive salary ranging from $120,000 to $140,000, this role rewards your expertise while encouraging both personal and professional growth.

ATC Automation offers a comprehensive benefits package, including Medical, Dental, Vision, 401(k), Life Insurance, Health Savings Account, Flexible Spending Account, and Paid Time Off. If you are passionate about creating advanced automation solutions and making a tangible impact, this is the perfect opportunity to showcase your talents.

Since 1977, ATC Automation has been redefining what’s possible in custom 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.

• Lead the mechanical design of systems, mechanisms, and components for custom automated machinery and tools
• Develop and enforce best practices, standards, and continuous improvement initiatives in mechanical design
• Integrate off‑the‑shelf and custom automation components, including robotics, actuators, sensors, and vision systems
• Deliver projects on time and within budget; coordinate project status with Project Managers and cross‑functional stakeholders
• Generate accurate 3D CAD models and fully detailed 2D drawings for manufacturing and assembly
• Mentor and train junior engineers, including reviewing and approving their work for accuracy and quality
• Support the build and commissioning of equipment, providing hands‑on assistance and guidance to the production team
• Build and test mechanical prototypes when necessary to validate concepts before full‑scale deployment
• Collaborate with controls and software teams to ensure seamless integration of mechanical and electronic subsystems
• Manage and communicate with external suppliers to ensure component quality, lead time, and compatibility
• Work closely with customers to refine requirements, align design intent, and ensure functional success
• Support onsite equipment deployment, installation, and troubleshooting as required

• Demonstrated track record of success in custom automation and machine design
• Strong ability to size and specify automation peripherals, including actuators, sensors, and vision systems
• Expert‑level proficiency with Solid Works (or equivalent CAD software)
• Mastery of engineering drawings, tolerancing, and GD&T (Y14.5M‑2009)
• Deep knowledge of mechanical components, materials, and fabrication processes (e.g., machining, welding, sheet metal)
• Proficiency in basic controls and automation system concepts
• Excellent problem‑solving, analytical, and decision‑making skills
• Strong written and verbal communication skills
• 6+ years of hands‑on experience designing custom automated equipment
• Proven ability to specify and troubleshoot pneumatic systems and components
• Expertise in designing fixtures, jigs, and custom tooling for precision assembly or automation applications

• BS or higher degree in mechanical engineering or a related field
• 10+ years of experience in a mechanical design role within custom automation, machine building, or related industries
• Familiarity with compliance standards such as CE, NFPA 79, and SEMI S8
• Hands‑on experience troubleshooting and improving performance of automated machinery
• Ability to specify and integrate vision equipment, including cameras, lenses,…