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.

Machinery & Mechanical Supervisor Job Summary

The Marathon Los Angeles Refinery located in Carson/Wilmington California has an opening for a Machinery & Mechanical Supervisor. This position will supervise and lead maintenance work group typically of union-represented crafts. This position will be responsible for safe and efficient execution of maintenance work in an environmentally compliant manner.

The schedule for the position is Monday-Thursday 10 hours days 6 AM- 4:30 PM, answer after calls 2-3 times a week normally concerns can be handled over the phone and support TAR and outages 1-2 times a year.

Key Responsibilities:

• Supervise craft work group to ensure maintenance work is efficiently executed without incident in an environmentally compliant manner.

• Supervise and lead work group. Accountable for fair and uniform application of policies and procedures. Responsible to meet all that is applicable to the role of our routine maintenance foremen.

• Ensure assigned craft personnel are adequately trained for their job assignment. Identify training needs and participate in development of training programs for craft skill pool.

• Maintain visible and active field presence to promote safe working environment and ensure adherence to safe work practices.

• Assist in setting schedules. Monitor and appraises progress to ensure productivity, work quality and schedule adherence.

• Ensure team understands work scope and performance expectations. Assist with troubleshooting. Ensure work orders are satisfactorily completed and properly closed out.

• Promote proactive reliability-centered maintenance (RCM) focus.

• Communicate daily activities related to manpower, accomplishments and problem areas to management.

• Participate in audits and near-miss/incident investigations. Follow-up on safety issues until closure. Active member of safety committee.

• Coordinate with planning and scheduling to ensure appropriateness of job packages. Ensure materials used comply with current engineering standards. Identify and resolve delays that would prevent schedule attainment. Participate in maintenance cost control including challenging need for discretionary work.

• Collaborate with other supervisors, planning & scheduling and reliability teams to develop repair strategies and maintain reliability of refinery plant mechanical equipment in support of continuous operations. Maintain current, accurate and complete records for assigned area.

Education, Experience and Skills Minimum Qualifications

• Must have High school diploma or GED. (Education must be obtained/completed prior to start date)

• Must have a minimum of 5 years of industrial machinery maintenanceexperience in a refinery or petrochemical facility.

• Must be able to read and understand equipment manuals, procedures and schematics to troubleshoot and repair equipment.

• Must be familiar with Microsoft: 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. (MPC determines valid status.)

• Must be able to obtain a TWIC Card.

• Must be legally authorized to work in the US without the need for future VISA sponsorship.

• Travel Requirement is 5% or less.

• The schedule for the position is Monday-Thursday 10 hours days 6 AM- 4:30 PM, answer after calls 2-3 times a week normally concerns can be handled over the phone and support TAR and outages 1-2 times a year.

• Preferred Qualifications

• Previous supervisory experience is preferred.

• Knowledge of basic principles required to repair centrifugal pumps and reciprocating and centrifugal compressors is preferred.

• Ability to troubleshoot mechanical machinery within refinery to minimize downtime, maximize reliability and ensure compliance is preferred.

This job will posted through April 23, 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 CA Refinery:

Job Requisition ID:

00021553

Pay Min/Max:

$122,900.00 - $184,300.00 Salary

Grade:

12

Location Address:

2350 E 223rd St

Additional locations:

Education:

High School (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 talentacquisition@marathonpetroleum.com. 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.