Senior Chemical Process Design Engineer - POG

mpc; Carson (CA); On-site; USD 123,000 - 212,000; Full time

Benefits offered by this job

Health, vision, and dental insurance

Paid time off

401k matching

Paid parental leave

Educational reimbursement

Job summary

The Marathon Carson Refinery in Carson, California is seeking a Senior Chemical Process Design Engineer (POG) to drive long-term strategy for process optimization and growth. You will develop designs for new projects and unit modifications, including PFDs, P&IDs, and heat/material balances, while leading safety reviews and design reviews.

Ideal candidates hold a Bachelor's in Chemical Engineering with 7 years of experience in refinery/petrochemical design and operations, and are proficient in

Qualifications

• Bachelor's Degree in Chemical Engineering; required before start date.
• Total 7 years of experience combining chemical process design and operations support in refinery/petrochemical.
• Proficient in Microsoft 365: Word, Excel and Outlook.
• Must wear PPE in refinery (respirator) and pass hair drug test and physical.
• Must have a valid driver’s license.
• Must be legally authorized to work in the US without visa sponsorship.
• Travel requirement is 5-10%.
• Onsite schedules: 9/80, 5/40 or 4/1; TAR support occasionally.

Responsibilities

• Contributes to long-term strategy to increase throughput, yields, reliability, and energy optimization.
• Develops process designs for new projects and unit modifications, including PFDs, P&IDs, and heat/material balances.
• Performs simulations and calculations for sizing, hydraulics, and energy optimization; leads ROI analysis.
• Collaborates with project engineers, operations, and vendors to align design with needs.
• Prepares process design packages and supports HAZOPs, LOPA reviews.
• Provides technical leadership during project execution, including reviews and commissioning.
• Stays current with industry standards to ensure high-quality designs.
• Serves as mentor for less experienced engineers.

Skills

Microsoft 365

Driver's license

Travel readiness

Education

Bachelor's Degree in Chemical Engineering

Tools

PFDs & P&IDs

Heat/material balances

Process simulations

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.

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 may require 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.

Location: Carson, California

Job Requisition ID: 00024506

Pay Min/Max: $122,900.00 - $212,000.00 Salary

Grade: 12 - 13

Location Address: 2350 E 223rd St

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, citizenshipor any other status protected by applicable federal, state, or local laws.

If you need a reasonable accommodation for any part of the application process at Marathon Petroleum LP, please contact our Human Resources Department at [e-mail]. 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.

• access to health, vision, and dental insurance
• paid time off
• 401k matching program
• paid parental leave
• 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.