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Senior Chemical Process Design Engineer - (POG) Process Optimization and Growth

Job Summary

The Marathon Carson Refinery located in Carson, California is seeking an experienced Senior Chemical Process Design Engineer (POG) Process Optimization and Growth to contribute to refinery/ organizational long-term strategy development and identifies opportunities to increase throughput, improve yields, increase reliability and optimize energy use in process units. This position will develop process designs for new projects and unit modifications, including PFDs, P&IDs, and heat/material balances.

The available onsite schedules for the position are 9/80, 5/40 or 4/1, after hours calls maybe requires infrequently and support of TAR project related implementation every few years. Core hours: 8 AM - 3 PM.

Key Responsibilities

• Contributes to refinery/organizational long-term strategy development and identifies opportunities to increase throughput, improve yields, increase reliability and optimize energy use in process units. Develops process designs for new projects and unit modifications, including PFDs, P&IDs, and heat/material balances.
• Performs process simulations and calculations to support equipment sizing, hydraulic analysis, and energy optimization as well as lead economic analysis and establish project rate of return.
• Collaborates with project engineers, operations, and external vendors to ensure alignment of design with operational needs.
• Prepares process design packages and support HAZOPs, LOPA studies, and other safety reviews.
• Provides technical leadership during project execution, including design reviews, construction support, and commissioning.
• Stays current with industry standards and best practices to ensure high-quality, cost-effective designs.
• Serves as mentor for less experienced engineers.

Education, Experience and Skills

Minimum Qualifications 

• Must have a Bachelors Degree in Chemical Engineering. (Education must be obtained/completed prior to start date.)
• Must have at least 3 years of chemical process design engineering AND 4 years of operations support experience in a refinery and petro-chemical industry. Candidate must have a total of 7 years of experience.
• Must be proficient in Microsoft 365: 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 a valid driver’s license.
• Must be legally authorized to work in the US without the need for future VISA sponsorship.
• Travel Requirement is 5-10%.
• Must be able to work onsite schedules for the position are 9/80, 5/40 or 4/1, after hours calls maybe requires infrequently and support of TAR project related implementation every few years. Core hours: 8 AM - 3 PM.

Preferred Qualifications

• Knowledgeable in FCC, Hydrotreating and Hydrocracking, Reforming unit technologies is preferred.
• Previous refinery operations support engineering and process designed experience is preferred.

Relocation may be available. https://mympcbenefits.com/relocating/

This job will posted through Friday, Oct 9, 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.

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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 [email protected]. 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.