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. Position Summary The Continual Commercial Improvement (CCI) Engineer plays a critical role in analyzing and enhancing refinery performance by identifying optimization opportunities across the value chain. This role blends commercial and technical insight to evaluate past decisions, support planning and scheduling, and improve forward-looking strategies. The CCI Engineer collaborates across functions to run backcasts, validate assumptions, close margin gaps, and drive data-informed improvements that unlock long-term value. Key Responsibilities + Support the commercial optimization of refinery operations by integrating feedstock selection, intermediate and product placement, and supply chain economics with market analysis and margin insights. + Apply a working knowledge of refinery operations, economics, and market dynamics to identify, quantify, and communicate strategies that close performance gaps and capture missed opportunities. + Collaborate with local and regional value chain teams to align on economic drivers and ensure that planning decisions support enterprise-wide optimization. + Develop and maintain executable refinery production plans using linear programming (LP) models; adjust plans in response to margin shifts, demand changes, or operational constraints. + Analyze and optimize buy-versus-make decisions by evaluating costs, quality, supply logistics, and market conditions in collaboration with cross-functional stakeholders. + Build and refine backcasting models to evaluate historical performance, validate planning assumptions, and uncover margin leakage or optimization opportunities. + Conduct structured analyses of historical refinery data to identify trends, performance patterns, and actionable insights. Ensure data accuracy and completeness by working closely with supporting teams. + Assist in developing decision-making frameworks and communicate findings and recommendations to key stakeholders through clear and concise presentations. + Contribute to project support activities with a focus on data integrity, issue identification, and solution development under guidance. + Understand local refinery planning deliverables and scheduling processes, including APS, and contribute to the creation of production plans with support from team members. Education and Experience Planning & Optimization Engineer: Bachelor's degree in Engineering required. Three (3) years relevant experience. Technical Services or Economics & Planning experience preferred Senior Planning & Optimization Engineer: Bachelor's degree in Engineering required. Seven (7) years relevant experience. Technical Services or Economics & Planning experience preferred. Skills Action Planning Adaptability Business Acumen Communication Continuous Learning Critical Thinking Decision Making Innovation Problem Solving Results Driven Teamwork Location: San Antonio TX, West Refinery Locations Relocation: Available Estimated Travel: Limited, As needed to meet business needs This position grade may vary depending on candidate experience. The successful candidate will be placed at a level commensurate with experience and qualifications. As an energy industry leader, our career opportunities fuel personal and professional growth. Location: San Antonio, Texas Job Requisition ID: 00017462 Pay Min/Max: $119,900.00 - $206,800.00 Salary Grade: 12 - 13 Location Address: 19100 Ridgewood Pkwy Additional locations: Anacortes, Washington, El Paso, Texas, Kenai, Alaska, Salt Lake City, Utah, Wilmington, California Education: 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 (https://marathonpetroleum.brandextract.com/staged/marathonpetroleum.com/content/documents/Jobs\_/Department\_of\_Labor\_EEOC\_.pdf) . 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. About Marathon Petroleum Corporation Marathon Petroleum Corporation (MPC) is a leading, integrated, downstream energy company headquartered in Findlay, Ohio. The company operates the nation's largest refining system. MPC's marketing system includes branded locations across the United States, including Marathon brand retail outlets. MPC also owns the general partner and majority limited partner interest in MPLX LP, a midstream company that owns and operates gathering, processing, and fractionation assets, as well as crude oil and light product transportation and logistics infrastructure.