Senior Chemical Process Design Engineer - POG

4526 Marathon Refining Logistics Services LLC; Carson (CA); On-site; USD 123,000 - 212,000; Full time

Benefits offered by this job

Discretionary annual bonus

401k matching

Education reimbursement

Job summary

Marathon Carson Refinery in Carson, California is seeking a Senior Chemical Process Design Engineer focused on POG process optimization and growth. The role develops designs for new projects and modifications, supports safety reviews, and provides technical leadership across the project lifecycle.

You will lead process simulations, economic analysis, and collaboration with operations to improve throughput, yields, reliability and energy use while working onsite with standard schedules and TAR

Qualifications

• Must be proficient with Microsoft Word, Excel and Outlook.
• Ability to wear PPE in refinery environments and perform field tasks.

Responsibilities

• Contributes to refinery/organizational long-term strategy and identifies opportunities to increase throughput and energy efficiency.
• Develops process designs for new projects and unit modifications (PFDs, P&IDs, heat/material balances).
• Performs process simulations and calculations for equipment sizing and energy optimization; leads economic analysis and ARR (rate of return).
• Collaborates with project engineers, operations, and vendors to align design with operational needs.
• Prepares process design packages and supports HAZOPs, LOPA, and safety reviews.
• Provides technical leadership during project execution including design reviews and commissioning.
• Stays current with industry standards to deliver high-quality, cost-effective designs.
• Mentors junior engineers.

Skills

Microsoft 365 proficiency

Education

Bachelor7s Degree in Chemical Engineering

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

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 may require 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/

Location

Carson, California

Pay

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

Salary Grade: 12 - 13

Location Address

2350 E 223rd St

Additional Locations

Education: Bachelors (Required)

Employee Group

Full time

Employee Subgroup

Regular

Equal Opportunity Employer

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.

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.

Benefits

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.

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/

Job Requisition ID: 00024506

This job will posted through Friday, Oct 9, 2026.

About Marathon Petroleum Corporation

Marathon Petroleum Corporation (MPC) is a leading, integrated, downstream energy company headquartered in Findlay, Ohio. The company operates the nation's largest refining system. MPC's marketing system includes branded locations across the United States, including Marathon brand retail outlets. MPC also owns the general partner and majority limited partner interest in MPLX LP, a midstream company that owns and operates gathering, processing, and fractionation assets, as well as crude oil and light product transportation and logistics infrastructure.