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Refinery Process Engineer Jobs in Illinois (NOW HIRING)

Process Engineer

Crystal Lake, IL · On-site

$100K - $120K/yr

The Process Engineer is also responsible for supporting all ongoing manufacturing and customer ... Develop and/or refine material specifications with an emphasis on meeting regulatory requirements ...

Engineer III Process

Downers Grove, IL · On-site

$106K - $149K/yr

The Process Engineer III will be responsible for routine process engineering and design tasks for ... in the refining, gas processing, chemical plant, food/beverage, corn wet milling, oilseed ...

Engineer II Process

Downers Grove, IL · On-site

$84K - $119K/yr

PREFERRED QUALIFICATIONS Licensed Professional Engineer Experience as a Process Engineer in the refining, gas processing, chemical plant, food/beverage, corn wet milling, oilseed processing ...

Lead Process Engineer

Lisle, IL · On-site

$140K - $185K/yr

Analyze, calculate, and design new or revamped process equipment in refinery, chemical, and other ... Bachelor of Science in Chemical Engineering Experience:Min Yr = 10+ Licensure: P.E. Preferred ...

Engineer III Process

Downers Grove, IL · On-site

$106K - $149K/yr

... Process Engineer in the refining, gas processing, chemical plant, food/beverage, corn wet milling, oilseed processing, decarbonization and/or energy transition industries. • Experience ...

Lead Process Engineer

Lisle, IL · On-site

$140K - $185K/yr

Analyze, calculate, and design new or revamped process equipment in refinery, chemical, and other ... Bachelor of Science in Chemical Engineering • Experience:Min Yr = 10+ • Licensure: P.E.

Analyze, calculate, and design new or revamped process equipment in refinery, chemical, and other ... Bachelor of Science in Chemical Engineering Experience:Min Yr = 10+ Licensure: P.E. Preferred ...

Lead Process Engineer

Lisle, IL · On-site

$140K - $185K/yr

Analyze, calculate, and design new or revamped process equipment in refinery, chemical, and other ... Bachelor of Science in Chemical Engineering • Experience:Min Yr = 10+ • Licensure: P.E.

Engineer II Process

Downers Grove, IL · On-site

$84K - $119K/yr

PREFERRED QUALIFICATIONS • Licensed Professional Engineer • Experience as a Process Engineer in the refining, gas processing, chemical plant, food/beverage, corn wet milling, oilseed processing ...

Process Engineer

Alsip, IL · On-site

$105K - $125K/yr

The Process Engineer at the Alsip Mini Mill will be responsible for optimizing production processes ... Optimize pulping, refining, screening, and paper machine operations to improve runnability, yield ...

The Process Engineer at the Alsip Mini Mill will be responsible for optimizing production processes ... Optimize pulping, refining, screening, and paper machine operations to improve runnability, yield ...

Analyze, calculate, and design new or revamped process equipment in refinery, chemical, and other ... Bachelor of Science in Chemical Engineering Experience: Min Yr = 08+ Licensure: P.E. Preferred ...

Staff Process Engineer

Lisle, IL · On-site

$110K - $150K/yr

Analyze, calculate, and design new or revamped process equipment in refinery, chemical, and other ... Bachelor of Science in Chemical Engineering Experience: Min Yr = 08+ Licensure: P.E. Preferred ...

Staff Process Engineer

Lisle, IL · On-site

$110K - $150K/yr

Analyze, calculate, and design new or revamped process equipment in refinery, chemical, and other ... Bachelor of Science in Chemical Engineering • Experience: Min Yr = 08+ • Licensure: P.E.

Staff Process Engineer

Lisle, IL · On-site

$110K - $150K/yr

Analyze, calculate, and design new or revamped process equipment in refinery, chemical, and other ... Bachelor of Science in Chemical Engineering • Experience: Min Yr = 08+ • Licensure: P.E.

The Process Engineer will be involved in the design and construction of new projects and ... We are a world leader in grain origination, storage, distribution, oilseed processing and refining ...

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Showing results 1-20

Refinery Process Engineer information

See Illinois salary details

$69.3K

$133.1K

$225.8K

How much do refinery process engineer jobs pay per year?

As of Jul 26, 2026, the average yearly pay for refinery process engineer in Illinois is $133,130.00, according to ZipRecruiter salary data. Most workers in this role earn between $98,400.00 and $142,900.00 per year, depending on experience, location, and employer.

What does a Refinery Process Engineer do?

A Refinery Process Engineer is responsible for designing, optimizing, and troubleshooting processes within an oil refinery to ensure efficiency, safety, and regulatory compliance. They analyze data, monitor equipment performance, and recommend improvements to enhance productivity and reduce costs. Additionally, they work closely with operations, maintenance, and safety teams to implement process modifications and resolve technical issues. Their role is crucial in maximizing yield, minimizing energy consumption, and ensuring environmental compliance.

What are some of the typical day-to-day responsibilities for a Refinery Process Engineer?

As a Refinery Process Engineer, your main responsibilities typically include monitoring and optimizing production processes, troubleshooting technical issues, and ensuring compliance with safety and environmental regulations. You may also be involved in analyzing process data, implementing improvements, and coordinating with operations, maintenance, and other engineering teams to maintain efficient plant performance. Your day could involve both desk work—such as process modeling and reporting—and fieldwork in the refinery, observing equipment and working closely with plant personnel. This blend of tasks helps ensure the refinery operates safely, efficiently, and at peak capacity.

What are the key skills and qualifications needed to thrive in the Refinery Process Engineer position, and why are they important?

To excel as a Refinery Process Engineer, a strong background in chemical engineering, process optimization, and safety protocols is essential, typically supported by a relevant engineering degree. Proficiency with process simulation software (such as Aspen HYSYS or CHEMCAD), knowledge of distributed control systems (DCS), and familiarity with industry certifications like Six Sigma or Professional Engineer (PE) licensure are highly valued. Problem-solving abilities, strong communication, and teamwork skills help professionals navigate dynamic refinery environments and coordinate with cross-functional teams. These competencies are crucial for ensuring efficient, safe, and compliant operations within complex refinery processes.

What job categories do people searching Refinery Process Engineer jobs in Illinois look for? The top searched job categories for Refinery Process Engineer jobs in Illinois are:
What cities in Illinois are hiring for Refinery Process Engineer jobs? Cities in Illinois with the most Refinery Process Engineer job openings:
What are popular job titles related to Refinery Process Engineer jobs in IL? For Refinery Process Engineer jobs in IL, the most frequently searched job titles are:
Infographic showing various Refinery Process Engineer job openings in Illinois as of July 2026, with employment types broken down into 9% As Needed, 81% Full Time, and 10% Contract. Highlights an 88% In-person, and 12% Remote job distribution, with an average salary of $133,130 per year, or $64 per hour.
Intern/Co-op - Refining Chemical Engineering Fall 2026

Intern/Co-op - Refining Chemical Engineering Fall 2026

Marathon Petroleum Corporation

Robinson, IL

$32.92/hr

Part-time

Medical, Dental, Vision, Retirement, PTO

Posted 12 days ago


Marathon Petroleum rating

6.4

Company rating: 6.4 out of 10

Based on 201 frontline employees who took The Breakroom Quiz

64th of 86 rated oil and gas companies


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 can expect to become familiar 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.

Most Chemical Engineering co-ops and interns enter into the following positions:

Process / Technical Service Engineersmay 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. The vast majority of our Chemical Engineering interns/co-ops work in this area. The experience will expand your understanding of the refining environment and technical aspects of the refinery. Past projects/duties 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 in regards to catalyst and adsorbents; complete projects and provide recommendations for improvements to the refinery process and equipment.

Operations Research Engineersmay help develop planning, blending, scheduling, and process models for refinery engineers. The models are used to optimize crude oil purchasing, refinery production, blending and finished product scheduling, and optimization of refinery production. 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 Engineerswork on projects that involve the compliance of the entire refinery, and you will be exposed to the majority of process units in the refinery. You will be applying the engineering principles and calculations to various environmental projects and will also give you a broad knowledge of the various environmental laws that are applicable to refineries and what it takes to maintain compliance with those laws. Past projects/duties include: perform process calculations for the Risk Management Plan, including taking physical surveys of refinery process units; work on various process engineering projects within a Wastewater Treatment Plant; participate in inspections and/or testing that is conducted by federal, state, or local officials.

Products Control / Economics Engineersmay work on a wide array of projects including operations, blending, and refinery economics. You will gain an understanding of how a tank farm is operated and how gasoline and other products are prepared and shipped to customers. In addition, you will gain some exposure to the overall economics of the refinery and how operating decisions are made based upon these economics. Past projects/duties include: analyze refinery process flow data and compare to recommended optimum levels, this will help in identifying equipment failures which cause variances in capacity from the optimum levels; update information on gasoline blends and tank samples in preparation 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
  • Candidates must be 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 - $41.6 per hour

Learn more about Marathon Petroleum's benefits at www.mympcbenefits.com

As an energy industry leader, our career opportunities fuel personal and professional growth.

Location:

Findlay, Ohio

Job Requisition ID:

00018592

Pay Min/Max:

$0.00 - $999.99 Hourly

Grade:

HRLY1

Location Address:

539 S Main St

Additional locations:

Anacortes, Washington, Canonsburg, Pennsylvania, Canton, Ohio, Catlettsburg, Kentucky, Detroit, Michigan, Dickinson, North Dakota, El Paso, Texas, Garyville, Louisiana, Kenai, Alaska, Mandan, North Dakota, Martinez, California, Owensboro, Kentucky, Robinson, Illinois, Salt Lake City, Utah, San Antonio, Texas, St Paul Park, Minnesota, Texas City, Texas, Wilmington, California

Education:

Employee Group:

Part time

Employee Subgroup:

Intern

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 atmympcbenefits.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.


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About Marathon Petroleum

Sourced by ZipRecruiter

Marathon Petroleum Corporation, headquartered in Findlay, Ohio, US, is a leading independent petroleum refining, marketing, and transportation company. Their official website can be found at marathonpetroleum.com. The company, part of the energy sector, was established in 1887, making it one of the oldest petroleum companies in the US. It operates an integrated refining, marketing and transportation system concentrated primarily in the Midwest, Northeast, East Coast, Southeast and Gulf Coast of the United States. This includes refineries, pipelines, and terminals that process and transport crude oil and refined products.

Industry

Oil and gas extraction

Company size

10,000+ Employees

Headquarters location

Findlay, OH, US

Year founded

1887