Intern/Co-op - Refining Chemical Engineering Fall 2026

Marathon Petroleum Corporation; Mandan (ND); On-site; USD 44,083 - 56,481; Part time

Job summary

Marathon Petroleum Corporation offers engineering internship opportunities in Mandan, North Dakota. Interns will explore process equipment fundamentals, develop critical thinking, and gain exposure to refinery operations.

The program includes projects in process optimization, modeling, and economic analysis across multiple refinery disciplines. Candidates should be majoring in Chemical Engineering, demonstrate strong academics, and be authorized to work in the United States.

Qualifications

• Candidates must be majoring in Chemical Engineering.
• Strong academic performance.
• Authorized to work in the US on a full‑time indefinite basis without the need for employment visa sponsorship now or in the future.
• Positions are available spring, summer, and fall semesters.
• Availability for multiple work terms is preferred.
• A valid driver?s license is required.
• Concurrent enrollment in a degree seeking program.
• Military experience a plus.

Responsibilities

• Familiarize yourself with process equipment fundamentals and best practices.
• Develop and lead test runs to optimize refinery operations; perform process calculations.
• Monitor and make recommendations regarding catalyst and adsorbents; propose improvements to refinery process and equipment.
• Develop planning, blending, scheduling, and process models for refinery engineers.

Skills

Chemical Engineering

Strong academic performance

Education

Major in Chemical Engineering

Concurrent enrollment in a degree seeking program

Authorized to work in the US on a full‑time indefinite basis

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.

Responsibilities

As a Chemical Engineer at a Marathon refinery, you will familiarize yourself with process equipment fundamentals and best practices, build critical thinking skills, and gain an understanding of how all engineering disciplines work together as a cohesive team. You will also gain knowledge of various aspects of a refinery by working with a team of professionals who run a specific portion of the refining process. Most often, Chemical Engineers will have an opportunity to work on more than one area of the refinery, leading to a broad understanding of how the plant operates. Finally, you will have the opportunity to expand your written and verbal presentation skills in a professional work environment.

Process / Technical Service Engineers

May work on a variety of projects in the Technical Services Department together with your mentor that put your classroom experience as a Chemical Engineer into practice. Past projects include: develop and lead test runs to optimize refinery operations; perform process engineering calculations concerning the various process technology (or equipment) in the refinery; monitor and make recommendations regarding catalyst and adsorbents; complete projects and provide recommendations for improvements to the refinery process and equipment.

Operations Research Engineers

May help develop planning, blending, scheduling, and process models for refinery engineers. Typical college co‑op assignments include: validation of production data and mass balancing, process modeling, and development of graphical interfaces of refinery process units.

Environmental Engineers

Work on projects that involve the compliance of the entire refinery, and you will be exposed to the majority of process units in the refinery. Past projects include: perform process calculations for the Risk Management Plan; work on various process engineering projects within a Wastewater Treatment Plant; participate in inspections and/or testing conducted by federal, state, or local officials.

Products Control / Economics Engineers

May work on a wide array of projects including operations, blending, and refinery economics. Past projects include: analyze refinery process flow data and compare to recommended optimum levels; update information on gasoline blends and tank samples for an annual blender waiver audit; develop applications to better present process data for refinery operating decisions.

Qualifications

• Candidates must be majoring in Chemical Engineering
• Strong academic performance
• Authorized to work in the US on a full‑time indefinite basis without the need for employment visa sponsorship now or in the future
• Positions are available spring, summer, and fall semesters
• Availability for multiple work terms is preferred
• A valid driver's license is required
• Concurrent enrollment in a degree seeking program
• Military experience a plus
• MIN - $32.92 per hour / MAX - $41.60 per hour

Benefits

Learn More About Marathon Petroleum’s Benefits At www.mympcbenefits.com

Equal Opportunity Employer

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 [e-mail].