Mechanical Project Engineer

Marathon Petroleum Corporation; Carson (CA); On-site; USD 107,000 - 184,000; Full time

Benefits offered by this job

Relocation may be available

Discretionary annual bonus

Health insurance

Dental insurance

Vision insurance

401k with matching

Paid time off

Educational reimbursement

Job summary

Marathon Petroleum Corporation is seeking a Mechanical/Project Engineer at the Los Angeles Refinery in Wilmington/Carson, CA. The role provides technical support across operating areas and manages a broad range of engineering and construction projects.

Responsibilities include safety-driven project execution, equipment design reviews, and adherence to industry codes (ASME, API) and Marathon standards. Onsite schedules include 9/80, 5/40, or 4/1 with occasional TAR support.

Qualifications

• Bachelors Degree in Mechanical Engineering.
• Minimum of 4 years post-degree experience as Mechanical/Project Engineer in refining, petrochemical or manufacturing.
• Fixed equipment and detailed mechanical/piping design knowledge.
• Ability to manage multiple projects from conception to commissioning and start-up.
• Strong understanding of Management of Change requirements and processes.
• Excellent communication, time management, organizational, and interpersonal skills.
• Proficiency in MS Word, Excel, PowerPoint, and Outlook; ability to learn other systems.
• Must be able to wear PPE and pass hair drug test and physical.
• Valid driver's license; legal work status in the US; travel 5% or less.
• Flexibility to work 9/80, 5/40 or 4/1 onsite schedules and TAR support.

Responsibilities

• Define and implement projects to improve safety, profitability and reliability.
• Review equipment designs with Operations, SMEs, Reliability, Inspection, and Maintenance to identify issues and improvements.
• Ensure project designs meet ASME, API, NBIC, and Marathon specifications.
• Provide technical input for purchase and fabrication of equipment, piping, and valves; review vendor drawings.
• Support maintenance with technical reviews and approvals of temporary repair packages.
• Develop CWPs and provide technical engineering support for day-to-day operations.
• Initiate, develop, and execute MOCs for projects.
• Participate in unit and project PHAs and risk assessments.
• Promote safety awareness and take corrective action on unsafe practices.

Skills

Communication

Time management

Organizational skills

Interpersonal skills

Mechanical engineering knowledge

Piping and equipment design

Education

Bachelor7s Degree in Mechanical Engineering

Tools

Microsoft Word

Microsoft Excel

PowerPoint

Outlook

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.

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 years 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. https://mympcbenefits.com/relocating/

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 https://mympcbenefits.com/

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 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. 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.