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Refinery Process Engineer Jobs in California (NOW HIRING)

Ecoservices

Process Engineer

Long Beach, CA · On-site

$98K - $110K/yr

Our expertise in sulfuric acid processing and extensive plant network has enabled us to provide end ... S.) in Chemical Engineering * 2-5 years chemical plant, refinery, and/or engineering experience

Ortho Clinical Diagnostics

Senior Process Engineer

Carlsbad, CA · On-site

$107K - $139K/yr

... define, refine, and standardize process specifications that align with business objectives and ... Serve as the process engineering lead in R&D-to-Manufacturing transfer activities, guiding scale-up ...

QuidelOrtho

Senior Process Engineer

Carlsbad, CA

$107K - $139K/yr

... define, refine, and standardize process specifications that align with business objectives and ... Serve as the process engineering lead in R&D-to-Manufacturing transfer activities, guiding scale-up ...

Micro Typing Systems

Senior Process Engineer

Carlsbad, CA

$107K - $139K/yr

... define, refine, and standardize process specifications that align with business objectives and ... Serve as the process engineering lead in R&D-to-Manufacturing transfer activities, guiding scale-up ...

Baker Hughes

Refinery Account Manager

Huntington Beach, CA · On-site +1

$88K - $164K/yr

You will collaborate closely with Sales, Engineering, and Operations teams to drive value, identify growth opportunities, and ensure consistent, highquality program execution. As a Refinery Process ...

Baker Hughes

Refinery Account Manager

Huntington Beach, CA · On-site +1

$88K - $164K/yr

You will collaborate closely with Sales, Engineering, and Operations teams to drive value, identify growth opportunities, and ensure consistent, highquality program execution. As a Refinery Process ...

Worley

Senior Principal Process Engineer

Monrovia, CA · On-site

$177K - $261K/yr

Mentoring junior Process Engineers. * Reviewing requisitions, technical bid evaluations and ... Refinery experience. * Oil and Gas experience. * Saudi Aramco experience. * Experience leading and ...

Eichleay, Inc

Process Engineers

Larkspur, CA

Minimum of 5+ years' experience in Refining, Chemicals, Power, Life Sciences, Food & Beverage ... Perform process engineering calculations such as mass and energy balances, heat transfer, fluid ...

Eichleay, Inc

Process Engineers

Orange, CA

Minimum of 5+ years' experience in Refining, Chemicals, Power, Life Sciences, Food & Beverage ... Perform process engineering calculations such as mass and energy balances, heat transfer, fluid ...

QVC

Senior Process Engineer

Ontario, CA · On-site

$95K - $130K/yr

Your Opportunity, Your Team As a Senior Process Engineer at QVC, you'll help drive innovation and ... You'll refine our labor management systems and support continuous improvement efforts that shape ...

Herbalife

Sr. Process Engineer

Lake Forest, CA

$109K - $141K/yr

The Sr. Process Engineer, Quality Technical Services, is responsible for leading the design ... Refine, Review and Approve R&D scale up strategies from pilot to commercial application to ensure ...

Herbalife

Sr. Process Engineer

Lake Forest, CA

$109K - $141K/yr

The Sr. Process Engineer, Quality Technical Services, is responsible for leading the design ... Refine, Review and Approve R&D scale up strategies from pilot to commercial application to ensure ...

Herbalife

Sr. Process Engineer

Lake Forest, CA · On-site

$109K - $141K/yr

The Sr. Process Engineer, Quality Technical Services, is responsible for leading the design ... Refine, Review and Approve R&D scale up strategies from pilot to commercial application to ensure ...

Oklo

Process Engineer - Fuel Recycling

Santa Clara, CA · On-site +1

$100K - $160K/yr

Developing technical parameters and deploying and operating test systems to use in refining system ... a Process Engineer that is * Passionate about clean energy * An optimist at heart * Passionate ...

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All JobsRefinery Process Engineer JobsRefinery Process Engineer Jobs in California

Refinery Process Engineer information

See California salary details

$70.6K

$135.6K

$229.9K

How much do refinery process engineer jobs pay per year?

As of Jun 9, 2026, the average yearly pay for refinery process engineer in California is $135,586.00, according to ZipRecruiter salary data. Most workers in this role earn between $100,200.00 and $145,600.00 per year, depending on experience, location, and employer.

What does a Refinery Process Engineer do?

A Refinery Process Engineer is responsible for designing, optimizing, and troubleshooting processes within an oil refinery to ensure efficiency, safety, and regulatory compliance. They analyze data, monitor equipment performance, and recommend improvements to enhance productivity and reduce costs. Additionally, they work closely with operations, maintenance, and safety teams to implement process modifications and resolve technical issues. Their role is crucial in maximizing yield, minimizing energy consumption, and ensuring environmental compliance.

What are some of the typical day-to-day responsibilities for a Refinery Process Engineer?

As a Refinery Process Engineer, your main responsibilities typically include monitoring and optimizing production processes, troubleshooting technical issues, and ensuring compliance with safety and environmental regulations. You may also be involved in analyzing process data, implementing improvements, and coordinating with operations, maintenance, and other engineering teams to maintain efficient plant performance. Your day could involve both desk work—such as process modeling and reporting—and fieldwork in the refinery, observing equipment and working closely with plant personnel. This blend of tasks helps ensure the refinery operates safely, efficiently, and at peak capacity.

What are the key skills and qualifications needed to thrive in the Refinery Process Engineer position, and why are they important?

To excel as a Refinery Process Engineer, a strong background in chemical engineering, process optimization, and safety protocols is essential, typically supported by a relevant engineering degree. Proficiency with process simulation software (such as Aspen HYSYS or CHEMCAD), knowledge of distributed control systems (DCS), and familiarity with industry certifications like Six Sigma or Professional Engineer (PE) licensure are highly valued. Problem-solving abilities, strong communication, and teamwork skills help professionals navigate dynamic refinery environments and coordinate with cross-functional teams. These competencies are crucial for ensuring efficient, safe, and compliant operations within complex refinery processes.

What are popular job titles related to Refinery Process Engineer jobs in California? For Refinery Process Engineer jobs in California, the most frequently searched job titles are:
What job categories do people searching Refinery Process Engineer jobs in California look for? The top searched job categories for Refinery Process Engineer jobs in California are:
What cities in California are hiring for Refinery Process Engineer jobs? Cities in California with the most Refinery Process Engineer job openings:
What are popular job titles related to Refinery Process Engineer jobs in CA? For Refinery Process Engineer jobs in CA, the most frequently searched job titles are:
Refinery Process Engineer jobs near you
Infographic showing various Refinery Process Engineer job openings in California as of June 2026, with employment types broken down into 1% Locum Tenens, 1% As Needed, 97% Full Time, and 1% Contract. Highlights an 87% Physical, 5% Hybrid, and 8% Remote job distribution, with an average salary of $135,586 per year, or $65.2 per hour.

Process Engineer

Ecoservices

Long Beach, CA • On-site

$98K - $110K/yr

Other

Retirement

Posted 6 days ago

Job description

Ecovyst is the leader in sulfuric acid regeneration. Our expertise in sulfuric acid processing and extensive plant network has enabled us to provide end-to-end regeneration services to support alkylate production for more than 75 years. We are serving long-term sustainable trends.

Our business line:

  • Ecoservices provides sulfuric acid regeneration, virgin sulfuric acid, treatment services, and much more.

What we have to offer:

  • Competitive pay
  • Full benefit package starting day 1
  • 401k matching
  • Tuition Reimbursement


The base salary range for this position in as for the job description criteria as listed is $98,000 to $110,0000 annually. Our salary ranges are determined by market data based on position and level. The range displayed on each job posting reflects the minimum and maximum salaries for that position. Where an individual's pay falls within the range is determined by factors including, but not limited to, location, job-related skills, experience, and relevant education or training.


In some cases, compensation may fall outside of this range depending on factors, including a candidate's qualification, skills, competencies, experience, and location. Base pay is one part of the Total Rewards package that is provided to compensate and recognize employees for their work.

Position Overview:

The Process Engineer is responsible for monitoring and optimizing plant process performance for improving plant safety, reliability, and efficiency.

What you will be doing:

  • Provide plant production troubleshooting support and technical support for assigned projects.
  • Investigate and implement ways to reduce costs in Plant processes.
  • Author FEL1 Capital Project scope & justifications.
  • Assist with prioritizing maintenance work.
  • Execute small capital projects, including field construction supervision.
  • Arrange and supervise contractors for assigned projects.
  • Participate in HSES (Health, Safety, Environmental, Sustainability) teams/meetings to address safety and environmental issues.
  • Conduct incident investigations and implement corrective actions as needed.
  • Perform release calculations for environmental releases.
  • Analyze problems/opportunities and participate in identifying solution options.
  • Provide technical documentation to provide continuity and prevent recurrence of problems.
  • Support planning, execution, and documentation of Turnaround activities.
  • Provide technical support for startup/shutdown and standard operating procedures.
  • Assist with design, analysis, and optimization of highly integrated processes as well as basic unit operations such as reactors or heat exchangers.
  • Manage Operations documentation including SOPs, P&IDs, BFDs, PFDs, Critical Interlock Matrix, Master Alarm List & Control Narratives, and alarm management efforts.
  • Support Management Team initiatives and help drive change.
  • Support Equipment Strategy and Equipment Best Practice compliance.
  • Use operating parameter compliance tools to analyze process and drive improvements.
  • Author RCFAs as needed.
  • Improve process tuning and control schemes.
  • Maintain, update, and improve site control systems including DCS, SIS, PLCs, process data historians and operator rounds.


Required Qualifications:

  • Bachelor’s degree (B.S.) in Chemical Engineering
  • 2-5 years chemical plant, refinery, and/or engineering experience
  • Familiarity with industry standards & practices (OSHA, API, ASME, NFPA)
  • Familiarity with PSM/RMP regulations
  • Ability to comprehend equipment, P&ID, loop, etc. drawings.
  • Working knowledge of chemical engineering principles including process controls
  • Ability to multi-task and manage multiple priorities.
  • Ability to work in the field (climbing stairs and ladders, equipment and vessel entry, etc.)
  • Problem solving and critical thinking skills with the ability to reason and deduce.
  • Proficiency with Word, Excel, PowerPoint required.
  • Will work in a 24/7 continuous operation chemical manufacturing plant and be required to be on call on a rotational basis.
  • Ability to communicate (both written and verbal) effectively and promptly with all levels of the organization.
  • Familiarity or experience with Aspen Tech Process Simulation Software a plus.