Senior Process Engineer Jobs in Menifee, CA (NOW HIRING)

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Date: Jul 30, 2026

Location: Corona, CA, US, 92879

Shape the Future with Us.

At Lubrizol, we’re bringing to life the chemistry behind clean water, efficient transportation, reliable infrastructure, critical medicines, and the products people rely on every day through science, sustainability, and a culture of inclusion.

As part of our global team, you’ll be empowered to make a real impact - on your career, your community, and the world around you.

Job Type: Full -Time / On-Site

Salary: $120,000 - $140,000 with 6% bonus

How You’ll Make an Impact

As a Senior Process Engineer, you'll be at the forefront of our innovation, providing technical assistance and engineering support to the manufacturing group. You'll collaborate with a diverse group of passionate individuals to deliver sustainable solutions to advance mobility, improve wellbeing and enhance modern life. Your work will directly impact improving existing processes, developing new and cost-effective manufacturing concepts, as well as training production operators, and engaging maintenance personnel in resolving equipment problems using systematic methods of troubleshooting, root cause analysis, and irreversible corrective action implementation. The Senior Process Engineer will be assigned to support all functions of the manufacturing areas.

• Drive process improvements including technology, reducing scrap, and new concepts made real and reduced costs as to meet customer expectations on Quality and cost.
• Support extrusion, secondary operations, and packaging to ensure delivery and quality levels.
• Lead flawless launches of new product activities including FMEA, PFD, part and tool design reviews, and other cross functional team events.
• Engage maintenance personnel in resolving process, and equipment problems using systematic methods of troubleshooting, root cause analysis, and irreversible corrective action implementation.
• Provide technical evidence and responses to customer service/customers as required.
• Mentor techniciansand engage maintenance personnel in resolving, tooling and equipment problems using systematic methods of troubleshooting, root cause analysis, and irreversible corrective action implantation.
• Drive validation and qualification (IQ/OQ/PQ) protocols for new product, equipment, tooling and processes as directed.
• Follow SOP on re-validation of existing equipment, tooling and processes.
• Work closely with internal and external Project Engineers in developing processes that meet customer expectations on cost, quality and delivery of new product development.
• Document lessons learned and report status of all projects and assignments in a timely manner.
• Generate, update and implement process documentation, to include PCO’s, operator work instructions, manufacturing procedures, sample requests, process, inspection and troubleshooting guides.
• Close assigned CAPA’s in a timely manner.
• Complete projects and report status in a timely manner. Utilize project management tools in establishing timelines, building action item list and completing milestones.
• Understand and follow the SOP’s pertaining to the specific area.
• Understand and follow the work instructions pertaining to the specific area.
• Communicate clearly and concisely, both orally and in writing.
• Assists cost accounting in establishing new or revised standard costs for new or existing product lines.
• Support the conversion of small –scale processes into commercially viable large-scale operations.

Required Qualifications that Enable Your Success

• BS Degree in an Engineering discipline (Chemical, Mechanical or Biomedical preferred)
• 5+ Years of experience in an industrial environment including Co-op experience.
• Experience with Root cause analysis
• Excellent (written and verbal) communication and effective human interaction skills.

Preferred Qualifications that Drive you Forward

• Experience with Thermoplastics extrusion, molding and/or assembly process is strongly preferred.
• Six Sigma Green or Black Belt
• Lean Manufacturing
• Flexible to change, and possess a high degree level of integrity and “can do attitude”.
• Able to comprehend college algebra, college physics, basic chemistry, statistics and unit conversion.
• Able to learn fast and multi-task.

Your Work Environment At Lubrizol, we’re committed to providing a safe, inclusive, and empowering environment where you can do your best work—whether in a lab, on the production floor, or in a hybrid office setting. Depending on your role, your work environment may include:

• Standing, walking, or operating equipment for extended periods
• Working in a lab or manufacturing setting with appropriate PPE provided
• Use of computers and digital tools in an office or hybrid environment
• Occasional lifting or movement of materials
• Adherence to rigorous safety protocols and ergonomic standards

We continuously invest in our facilities and technologies to ensure they support your well-being, productivity, and growth. If you require reasonable accommodation, we are committed to working with you to ensure an inclusive and accessible experience.

Benefits that Empower You

• Competitive salary with performance-based bonus plans
• 401(k) match + Age-Weighted Defined Contribution
• Health Savings Account (HSA)
• Paid holidays, vacation, and parental leave

Lubrizol: Imagined for Life. Enabled by Science. ™ Delivered by You. For nearly 100 years, The Lubrizol Corporation, a Berkshire Hathaway company, has been at the forefront of innovation to enhance everyday life, advance mobility, and make the modern world work better. Our specialty chemistry solutions—from engine oils, performance coatings, and skincare to medical devices and plumbing systems —are powered by the expertise, passion, and commitment of people like you. We tackle the world’s toughest challenges with science-based solutions, deeply understanding our customers to deliver innovative chemistry and differentiated value. Our inclusive culture, dedication to safety, and incredible global talent drive our success. Our solutions meet the evolving needs of the modern world—brought to life by science and, most importantly, delivered by you. Whether you're in the lab, on the production floor, or in the office, you'll be part of a team around the world that empowers you to think boldly, drive results, and contribute to solutions that shape a better, more sustainable future. We win because of you. Let’s build the future together.

Nearest Major Market: Corona
Nearest Secondary Market: Los Angeles
Job Segment: Biomedical Engineering, Process Engineer, Six Sigma Black Belt, Manufacturing Engineer, Lean Six Sigma, Engineering, Management