Chemical Process Engineer

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Chemical Process Engineer

The Marathon Los Angeles Refinery in Carson, CA has an opening for a

Chemical Process Engineer - Tech Services

. This position will provide technical support for plant operations and depending on experience this position may develop and mentor other junior Engineers within an Area Team. They may be assigned a specific unit or units within the Refinery with responsibilities of daily monitoring and troubleshooting of their areas, process optimization, and design and development of capital projects as well as major modifications to existing units. Process Engineers utilize process simulation and optimization to recommend programs and procedures to increase the economic efficiency of refining operations, and work in a team environment with operators and other engineers to maintain and troubleshoot control system problems.

The hours of the position will be 9/80 schedule, after hours calls are required only occasionally and support of TAR/Outages approximately once a year. Schedule start time is 7 AM (Subject to change). Key Responsibilities

- Provide troubleshooting and optimization assistance for Operations and maintains unit mass balance within tolerance. Conduct routine performance monitoring including energy consumption, yields and “process unit health” performance indicators. Generates, analyzes, interprets, acts upon and disseminates these performance indicators and unit operations data for assigned units. Evaluate catalyst usage and performance.

- Monitor process performance and identify opportunities for improving yield, energy efficiency, and reliability. May plan test runs and recommends projects to address opportunities. Identify long-term improvement opportunities to improve unit(s) profitability and optimize efficiency. Conduct process operations analysis and economic evaluation using simulation software or engineering calculations. Review findings with refinery management and secures approval to implement. Exercise judgment in equipment design and process development to compromise between process requirements, economics, operator effectiveness and environment/safety objectives.

- Provide technical input into development and implementation of operating manuals, Management of Change (MOC) development, hazard and operability reviews (HAZOPs) and piping and instrumentation diagram/drawing (P&ID) verification.

- Work with refinery’s Economics and Planning group to ensure unit constraints and yields are accurately reflected in refinery’s linear programming model and communicate individual unit’s economic drivers to Operations and refinery management and participate in technology advisory groups.

- Perform process engineering activities in all project phases including feasibility/economic studies, conceptual design, identification and evaluation of alternatives, front-end design, detailed engineering, construction, and startup/commissioning.

- Support collaboration with operations, engineering, and maintenance teams to resolve operational challenges. Develop and maintain relationships with console and field operators.

- Participate in hazard evaluations, incident investigations, and management of change. Participate in Process Hazard Analysis (PHA).

- Assist in planning and executing turnarounds/outages, including scope development and post-event evaluations

- Maintains and updates process documentation.

Minimum Qualifications

Education, Experience and Skills

- Must have a Bachelor's Degree in Chemical Engineering from an accredited institution. (Education must be obtained/completed prior to start date)

- Must have at least two (2) years or more of experience as process engineer in Oil and Gas Refining.

- Must be proficient in Microsoft: Word, Excel and Outlook.

- Must be able to wear appropriate PPE in the refinery (respirator), be able to physically perform all tasks in the field and take hair drug test and physical.

- Must have physical ability to access all areas of the refinery including use of stairs and/or ladders to inspect critical process and mechanical equipment.

- Must have a valid driver’s license. (MPC determines valid status.)

- Must be able to obtain a TWIC Card.

- Must be legally authorized to work in the US without the need for future VISA sponsorship.

- Travel Requirement is 5% or less.

- The hours of the position will be 9/80 schedule, after hours calls are required only occasionally and support of TAR/Outages approximately once a year. Schedule start time is 7 AM (Subject to change). On rare occasions must be available to respond to upset conditions during off-hours and work extended hours, including nights and weekends in process operations environment.

Preferred Qualifications

- More than two (2) years or more of experience as process engineer in Oil and Gas Refining.

- Experience with Aspen, HYSYS and PI Process Book is preferred.

This job will posted through Thursday, January 8, 2026.

This position belongs to a family of jobs with increasing responsibility, competency and skill level. Actual position title and pay grade will be based on the selected candidate’s experience and qualifications.

Learn more about Marathon Petroleum’s benefits at https://mympcbenefits.com/

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

Location:

Carson, California

Job Requisition ID:

00019919

Pay Min/Max:

$90,700.00 - $156,400.00 Salary

Grade:

10 - 11

Location Address:

2350 E 223rd St

Additional locations:

Education:

Bachelors (Required)

Employee Group:

Full time

Employee Subgroup:

Regular

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 at mympcbenefits.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.