Mechanical Project Engineer

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Mechanical Project Engineer

Job Summary

The Marathon Los Angeles Refinery located in Wilmington/Carson, California has an opening for a Mechanical/ Project Engineer.

This position is responsible for providing technical and mechanical support to the assigned Operating Area while developing and managing a wide range of engineering and construction projects.


The available onsite schedules for the position are 9/80, 5/40 or 4/1, after-hour calls are expected a few times during a month and support of TAR once or twice a year.

Key Responsibilities

• Define and implement Projects to improve safety, profitability and reliability. Ensures compliance with Management of Change (MOC), Process. Coordinate project scope development with other departments and outside engineering contractors. Develop estimates, decision support packages (DSPs) for assigned projects, Construction Work Packages (CWPs) and support construction.
• Review new and existing equipment designs working with Operations, SME's, Reliability, Inspection, and Maintenance to identify potential problems, root cause issues, or areas for improvement on as needed basis.
• In depth understanding of engineering and construction codes and specs to ensure project designs meet company and applicable standards (RAGAGEP) including ASME, TEMA, API, ANSI, NBIC and Marathon Specifications.

• Provide technical input for the purchase and fabrication of engineered equipment, piping, valves and perform technical reviews of vendor drawings.

• Support maintenance with technical reviews and approvals of temporary repair packages per ASME PCC-2 and applicable standards.
• Develop CWPs and provide technical engineering support as needed to support day to day operations, including temporary installations
• Initiate, develop, and execute MOCs for assigned projects.
• Participate in unit and project PHAs.
• Promotes safety awareness and takes corrective action when unsafe practices or conditions are observed.

• Lead or participate in incident investigations and root cause analyses and participates in HAZOP reviews and incident investigations; applies safety and environmental standards to designs.

Education, Experience and Skills

Minimum Qualifications

• Must have a Bachelor's Degree in Mechanical Engineering.

• Must have a minimum of 4 y ears post degree experience as a Mechanical or Project Engineer in the refining, petrochemical or manufacturing industry.

• Must have fixed equipment and detail mechanical/piping design knowledge.
• Must be able to manage multiple projects simultaneously of varying magnitude and complexity from conception to commissioning and start-up.
• Must have strong understanding of Management of Change requirements and processes.
• Must have excellent communication, time management, organizational, and interpersonal skills.
• Must be proficient in Microsoft: Word, Excel, Powerpoint, and Outlook and have the ability to learn other computer systems.

• 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% or less.
• Must be able to work on of the onsite schedules: 9/80, 5/40 or 4/1, after hours calls are required a few times a year and support of TAR once or twice a year.

Preferred Qualifications

• Refinery experience is preferred.
• Piping stress engineering experience is preferred.
• Project engineering experience is preferred.
• Demonstrated expertise with refinery equipment is preferred. (pumps, heat exchangers, heaters, vessels, piping, etc)

Relocation may be available.

This job will posted through August 26, 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

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

Location:
Carson, California

Job Requisition ID:
00023263

Pay Min/Max:
$106,900.00 - $184,300.00 Salary

Grade:
11 - 12

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 View email address on click.appcast.io. 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.