Instrumentation Project Engineer

Instrumentation Project Engineer – Los Angeles Refinery, MPC

Marathon Petroleum Corporation (MPC) is seeking an Instrumentation Project Engineer in the Area Engineering Department at its Los Angeles Refinery located in Carson/Wilmington, California.

The Instrument Engineer will provide technical support for refinery process areas and manually managed projects.

Responsibilities include:

• Execute instrumentation projects that align with refinery business objectives, supporting safe, reliable operations and compliance with applicable regulatory requirements.
• Apply project‑management skills across all phases: development, justification, design, construction, and start‑up.
• Provide instrumentation technical support to operating units and capital projects, including scope development and interdisciplinary coordination.
• Manage multiple projects/programs safely, efficiently, and within budget, developing strategies to meet schedules and mitigate delays.
• Perform specification and design of instrumentation, including sizing, selection, datasheet development/review, and preparation of technical requisitions for procurement.
• Support process safety activities such as Management of Change (MOC), Process Safety Information (PSI), mechanical integrity documentation, HAZOP, LOPA, and Safety Instrumented Systems (SIS) lifecycle requirements.
• Support testing and commissioning activities, including factory and site acceptance testing (FAT/SAT), loop checks, calibration, and startup.
• Evaluate new instrumentation technologies and support continuous improvement through collaboration with cross‑functional teams.
• Maintain accurate engineering documentation, including updates to P&IDs, loop drawings, and logic diagrams.
• Support refinery Turnarounds (TAR) and maintenance outages by planning instrumentation scope, coordinating with operations and maintenance, overseeing project implementation, and ensuring a safe, efficient return to service.
• Support SIS and LOPA gap closure projects by identifying instrumentation scope, developing technical solutions, coordinating implementation, and verifying compliance with process safety and functional safety requirements.
• Develop scope, cost estimates, and schedules for capital and expense projects; prepare Decision Support Packages (DSPs) and present to leadership.
• Coordinate with external engineering consultants and designers to complete projects.
• Collaborate with stakeholders including Maintenance, Construction, and Turnaround teams to support planning and execution.
• Participate in HAZOP reviews and incident investigations; may lead sessions depending on experience level.
• Apply engineering codes and specifications; ensure designs meet safety, environmental, and permitting standards.
• Promote safety awareness and take corrective action when unsafe practices or conditions are observed.

• Minimum:
  Bachelor’s Degree in Engineering.
• Minimum of 2 years of post‑degree instrumentation engineering experience in a refinery, chemical plant, or similar industry.
• Proficient in Microsoft Word, Excel, and Outlook.
• Valid driver’s license and legal authorization to work in the US without future visa sponsorship.
• Ability to wear appropriate PPE (including respirator) and perform all required tasks in the field.
• Physical capability to handle required field tasks and comply with safety requirements.
• Eligible for drug screening and physical examination, including hair drug testing.

Travel: 5% or less per year.

Work schedules: 9/80 or 4/1. Core business hours are 7AM – 4:30PM. After‑hours calls occur a few times a year. Time‑outside‑core business is limited and generally handled over the phone.

Relocation may be available. Benefits information is available at

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, please contact our Human Resources Department at talentacqu

If you need a reasonable accommodation for any part of the application process at Marathon Petroleum LP, please contact our Human Resources Department at talentacqu

A Human Resources representative will review your request and contact you to discuss a reasonable accommodation.