Planning & Optimization Engineer III​/Senior Planning & Optimization Engineer

Position Summary

Value Chain Optimization (VCO) is seeking a motivated and dynamic Planning & Optimization Engineer. The ideal candidate will have a keen interest in regional and refinery back casting, regional and refinery optimization, and LP submodel maintenance. The candidate must possess strong organizational, interpersonal, and communication skills.

• Enables and improves the commercial decision‑making processes across regional refinery operations (feedstock selection, product/intermediate placement, supply chain optimization, market analysis) by driving standard work, governance, tool adoption, and cross‑functional alignment without owning the daily planning decisions or plan outputs.
• Manages the commercial aspects of regional refinery operations, including feedstock selection, product and intermediate placement, supply chain optimization, and market analysis.
• Collaborates with local and regional value chain teams to align on economic drivers and ensure that planning decisions support enterprise‑wide optimization.
• Leads collaboration meetings within the value chain to discuss both local and regional economic drivers.
• Verifies refinery production plans using linear programming (LP) models, understanding differences in plans due to margin shifts, demand changes, or operational constraints, and communicates any changes needed to forecast tools or processes to capture value.
• Leads end‑to‑end evaluation of actual buy‑or‑make cases by evaluating actual costs, quality, supply logistics, and market conditions; develops sophisticated economic models and sensitivity analyses to assess risk and uncertainty; and collaborates with cross‑functional stakeholders to align strategies with actual outcomes.
• Leads the development and execution of backcast models, considering factors such as production efficiency, cost drivers, and market conditions; conducts in‑depth root cause analysis to identify factors influencing historical performance deviations; and collaborates with operational teams to implement corrective actions and continuous improvement initiatives.
• Assists in developing/verifying decision‑making frameworks and communicates findings and recommendations to key stakeholders through clear and concise presentations.
• Integrates into the local refinery planning team and learns the tools and processes for completing deliverables and scheduling, including APS; contributes to the validation of production plans with support from team members and leads any gap closures.

• Bachelor’s degree in Engineering required.
• Four (4) years of relevant experience required. Experience working with LP models (PIMS), as well as Refining and Midstream operations preferred.

• Action Planning
• Adaptability
• Business Acumen
• Communication
• Continuous Learning
• Critical Thinking
• Decision Making
• Innovation
• Problem Solving
• Results Driven
• Teamwork

Houston, Texas

Garyville, Louisiana;
Texas City, Texas

Marathon Petroleum Corporation 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,  (Use the "Apply for this Job" box below). 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 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.

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