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Refinery Process Operator Jobs in California (NOW HIRING)

$41.67/hr

The process control systems in the refinery provide real-time control and data acquisition functions in support of operating the refinery process and electrical equipment. Typical college co-op ...

UF6 Operator

Los Angeles, CA · On-site

$19.25 - $25.50/hr

High school diploma or GED * 3+ years of experience as an industrial plant operator, process operator, or equivalent in a high-hazard or regulated environment (e.g., chemical plants, refineries ...

UF6 Operator

Los Angeles, CA · On-site

$19.25 - $25.50/hr

High school diploma or GED * 3+ years of experience as an industrial plant operator, process operator, or equivalent in a high-hazard or regulated environment (e.g., chemical plants, refineries ...

Sr. Process Engineer

San Francisco, CA · On-site

$120K - $140K/yr

You will lead the design, deployment, and operation of first-of-its-kind refining processes for ... Create and maintain key engineering and operational documentation such PFDs, HMBs, P&IDs, Operating ...

Sr. Process Engineer

San Francisco, CA · On-site

$150 - $210/hr

You will lead the design, deployment, and operation of first-of-its-kind refining processes for ... Create and maintain key engineering and operational documentation such PFDs, HMBs, P&IDs, Operating ...

Process Engineer

Martinez, CA · On-site

$92K - $196K/yr

In this key technical role, you will focus on optimizing operating unit performance to achieve the ... Combination of office-based analytical work and active field inspections/testing within refinery ...

Process Engineer

Martinez, CA · On-site

$92K - $196K/yr

In this key technical role, you will focus on optimizing operating unit performance to achieve the ... Combination of office-based analytical work and active field inspections/testing within refinery ...

Showing results 21-40

Refinery Process Operator information

See California salary details

$13

$20

$30

How much do refinery process operator jobs pay per hour?

As of Sep 6, 2026, the average hourly pay for refinery process operator in California is $20.87, according to ZipRecruiter salary data. Most workers in this role earn between $18.03 and $22.79 per hour, depending on experience, location, and employer.

What is a refinery process operator?

Refinery Process Operators are skilled professionals responsible for controlling and monitoring the machinery and equipment in oil refineries. They oversee the refining process, ensuring that crude oil is converted into usable products like gasoline, diesel, and jet fuel efficiently and safely. Their duties include adjusting controls, conducting inspections, troubleshooting issues, and maintaining safety standards. Refinery Process Operators play a critical role in preventing accidents and ensuring the smooth operation of the facility.

What are the key skills and qualifications needed to thrive as a refinery process operator?

To thrive as a Refinery Process Operator, you need a solid understanding of chemical processes, mechanical systems, and safety protocols, often supported by a high school diploma or associate degree in a technical field. Familiarity with distributed control systems (DCS), process monitoring software, and industry safety certifications like OSHA are typically required. Attention to detail, problem-solving ability, and effective teamwork are essential soft skills for responding to operational issues and maintaining productivity. These skills ensure safe, efficient, and compliant refinery operations in a complex industrial environment.

What are some common challenges faced by refinery process operators, and how can they be managed effectively?

Refinery Process Operators often encounter challenges such as managing unexpected equipment malfunctions, responding to process upsets, and maintaining safety standards in a fast-paced environment. Effective communication with team members and prompt decision-making are crucial for troubleshooting issues and minimizing downtime. Operators typically rely on their training, process control systems, and support from maintenance or engineering teams to resolve problems quickly. Staying proactive with regular monitoring and adhering to safety protocols helps ensure smooth operations and a safe workplace.

What is the difference between Refinery Process Operator vs Chemical Plant Operator?

AspectRefinery Process OperatorChemical Plant Operator
CredentialsHigh school diploma or equivalent; certifications in refinery operationsHigh school diploma or equivalent; certifications in chemical processing
Work EnvironmentRefineries, oil processing facilitiesChemical manufacturing plants
Industry UsageOil and gas industryChemical manufacturing industry
Job FunctionsOperate and monitor refining equipment, ensure safety and efficiencyOperate chemical processing equipment, monitor reactions and safety

Refinery Process Operators and Chemical Plant Operators share similar credentials and work environments, often requiring certifications and safety training. While both roles involve operating complex equipment, Refinery Process Operators focus on oil refining processes, whereas Chemical Plant Operators work in chemical manufacturing. Understanding these differences helps job seekers identify the right career path within the processing industries.

How much do refinery process operators make in the US?

Refinery process operators in the US typically earn a median annual salary of around $70,000 to $80,000, with experienced workers and those in higher-cost-of-living areas earning over $100,000. Salaries can vary based on experience, certifications, and the complexity of the refinery environment.

What does a refinery process operator do in a refinery?

A refinery process operator monitors and controls the equipment and processes involved in refining crude oil into products like gasoline, diesel, and jet fuel. They adjust valves, interpret gauges, and ensure safety protocols are followed to maintain efficient and safe operations, often working in shifts and requiring technical training or certifications.

Where do refinery process operators make the most money?

Refinery process operators tend to earn higher salaries in regions with a high concentration of refineries and energy industries, such as areas with large petrochemical complexes or oil production facilities. Factors like experience, certifications, and working in remote or hazardous environments can also influence compensation levels.

What are popular job titles related to Refinery Process Operator jobs in California?

For Refinery Process Operator jobs in California, the most frequently searched job titles are:

What job categories do people searching Refinery Process Operator jobs in California look for?

The top searched job categories for Refinery Process Operator jobs in California are:

What cities in California are hiring for Refinery Process Operator jobs?

Cities in California with the most Refinery Process Operator job openings:

Infographic showing various Refinery Process Operator job openings in California as of August 2026, with employment types broken down into 1% As Needed, 79% Full Time, 17% Part Time, 2% Contract, and 1% Nights. Highlights an 92% Physical, 2% Hybrid, and 6% Remote job distribution, with an average salary of $43,408 per year, or $20.9 per hour.

Intern/Co-op - Refining Electrical Engineering (Spring 2027)

Marathon Petroleum Corporation

Los Angeles, CA

$32.92/hr

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 19 days ago


Key responsibilities

  • Familiarize with industry codes and best practices related to electrical engineering in a refinery setting.

  • Support and support area teams by working on electrical and instrumentation projects, troubleshooting issues, and analyzing equipment failures.

  • Develop project management skills through scope alignment, cost and schedule development, and teamwork during various engineering phases.


Marathon Petroleum rating

6.1

Company rating: 6.1 out of 10

Based on 205 frontline employees who took The Breakroom Quiz

69th of 87 rated oil and gas companies


Job description

An exciting career awaits you

At MPC, we're committed to being a great place to work - one that welcomes new ideas, encourages diverse perspectives, develops our people, and fosters a collaborative team environment.

Responsibilities:

As an Electrical Engineer at a Marathon refinery, you can expect to become familiar with industry codes and best practices, build critical thinking skills, and gain an understanding of how all engineering disciplines work together as a cohesive team. You will also gain knowledge of various aspects of a refinery by working with a team of professionals who run a specific portion of the refining process. Most often, Electrical Engineers will have an opportunity to work on more than one area of the refinery, leading to a broad understanding of how the plant operates. Finally, you will have the opportunity to expand your written and verbal presentation skills in a professional work environment.

The majority of Electrical Engineering co-ops and interns enter into the following positions:

Electrical & Instrumentation (E&I) Project Engineerswork on a variety of real-world electrical and instrumentation projects in a refinery setting. During your time at MPC, you will develop and utilize project management skills including scope alignment, cost and schedule development, and teamwork through multiple engineering phases. You will also support the area teams. We are committed to developing engineers into professional project managers who successfully manage projects of all sizes.

Reliability Electrical & Instrumentation (E&I) Engineerstroubleshoot Electrical & Instrumentation issues at the refinery. As a reliability intern, you will help analyze failures of equipment, develop solutions for recurring equipment difficulties, submit Project Request Forms (PRF's) to implement solutions, and understand equipment maintenance strategies. There will be opportunities to use electrical analysis software to solve coordination issues and run Arc Flash studies for the power system, as well as learning and understanding about how our critical Refinery Safety Instrumented Systems (SIS) are applied.

Process Control / Technical Service Engineerscan work on a wide array of projects in support of the process control systems installed throughout the refinery and products movements areas. The process control systems in the refinery provide real-time control and data acquisition functions in support of operating the refinery process and electrical equipment. Typical college co-op assignments include the following: troubleshooting system power supply problems, control system programming, hardware and software lifecycle replacement projects, installing and troubleshooting communication networks and monitoring control system performance metrics.

Qualifications:

  • Candidates must be majoring in Electrical Engineering
  • Strong academic performance
  • Candidates must be authorized to work in the US on a full-time indefinite basis without the need for employment visa sponsorship now or in the future.
  • Positions are available spring, summer, and fall semesters
  • Availability for multiple work terms is preferred
  • A valid driver's license is required
  • Concurrent enrollment in a degree seeking program
  • Military experience a plus
  • MIN - $32.92 per hour / MAX - $41.67 per hour

Learn more about Marathon Petroleum's benefits at www.mympcbenefits.com

As an energy industry leader, our career opportunities fuel personal and professional growth.

Location:

Findlay, Ohio

Job Requisition ID:

00020139

Pay Min/Max:

$0.00 - $999.99 Hourly

Grade:

HRLY1

Location Address:

539 S Main St

Additional locations:

Anacortes, Washington, Canton, Ohio, Catlettsburg, Kentucky, Detroit, Michigan, El Paso, Texas, Garyville, Louisiana, Kenai, Alaska, Mandan, North Dakota, Martinez, California, Robinson, Illinois, Salt Lake City, Utah, St Paul Park, Minnesota, Texas City, Texas, Wilmington, California

Education:

High School (Required)

Employee Group:

Part time

Employee Subgroup:

Intern

Marathon Petroleum Company LP is an Equal Opportunity Employer and gives consideration for employment to qualified applicants without discrimination on the basis of race, color, religion, creed, sex, gender (including pregnancy, childbirth, breastfeeding or related medical conditions), sexual orientation, gender identity, gender expression, reproductive health decision-making, age, mental or physical disability, medical condition or AIDS/HIV status, ancestry, national origin, genetic information, military, veteran status, marital status, citizenship or any other status protected by applicable federal, state, or local laws. If you would like more information about your EEO rights as an applicant, click here.
If you need a reasonable accommodation for any part of the application process at Marathon Petroleum LP, please contact our Human Resources Department at talentacquisition@marathonpetroleum.com. Please specify the reasonable accommodation you are requesting, along with the job posting number in which you may be interested. A Human Resources representative will review your request and contact you to discuss a reasonable accommodation. Marathon Petroleum offers a total rewards program which includes, but is not limited to, access to health, vision, and dental insurance, paid time off, 401k matching program, paid parental leave, and educational reimbursement. Detailed benefit information is available atmympcbenefits.com. The hired candidate will also be eligible for a discretionary company-sponsored annual bonus program.
Equal Opportunity Employer: Veteran / Disability

We will consider all qualified Applicants for employment, including those with arrest or conviction records, in a manner consistent with the requirements of applicable state and local laws. In reviewing criminal history in connection with a conditional offer of employment, Marathon will consider the key responsibilities of the role.


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About Marathon Petroleum

Sourced by ZipRecruiter

Marathon Petroleum Corporation, headquartered in Findlay, Ohio, US, is a leading independent petroleum refining, marketing, and transportation company. Their official website can be found at marathonpetroleum.com. The company, part of the energy sector, was established in 1887, making it one of the oldest petroleum companies in the US. It operates an integrated refining, marketing and transportation system concentrated primarily in the Midwest, Northeast, East Coast, Southeast and Gulf Coast of the United States. This includes refineries, pipelines, and terminals that process and transport crude oil and refined products.

Industry

Oil and gas extraction

Company size

10,000+ Employees

Headquarters location

Findlay, OH, US

Year founded

1887