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Internship Operating Engineer Jobs in St Louis, MO

Data & AI Platform Engineer

Saint Louis, MO · On-site

$111K - $133K/yr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

This is an early-career engineering role focused on building, operating, and improving cloud data ... internships/co-ops count). * Minimum 1 year of representative accounting experience whether ...

Mechanical Engineer Co-Op (Spring 2027))

Bridgeton, MO · On-site

$41K - $53K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

The ideal candidate will demonstrate the ability to grow toward operating with minimal supervision ... Minimum of 1 other related internship/Co-Op, technical club, or industry experience * Excellent ...

Embedded Software Engineer Intern

Bridgeton, MO

$41K - $53K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

The purpose of the internship is to provide meaningful professional hands-on experience to students ... Knowledge of Windows, Linux, or a real time operating system * Proficient use of Microsoft Office ...

Embedded Software Engineer Intern

Bridgeton, MO · On-site

$41K - $53K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

The purpose of the internship is to provide meaningful professional hands-on experience to students ... Knowledge of Windows, Linux, or a real time operating system * Proficient use of Microsoft Office ...

Early Career Substation Electrical Engineer

Saint Louis, MO

$61K - $91K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

... be on an internship or co-op basis * Minimum 3.0 Grade Point Average (GPA) * Knowledge of ... S. operating company of WSP, one of the world's leading engineering and professional services firms.

Early Career Substation Electrical Engineer

Saint Louis, MO · On-site

$61K - $91K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

... be on an internship or co-op basis * Minimum 3.0 Grade Point Average (GPA) * Knowledge of ... S. operating company of WSP, one of the world's leading engineering and professional services firms.

Early Career Substation Electrical Engineer

Saint Louis, MO · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

At least three months of relevant electrical engineering work experience; could be on an internship ... S. operating company of WSP, one of the world's leading engineering and professional services firms.

Lead Software Engineer (C/C++)

O Fallon, MO · On-site

$140 - $180/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Have you developed software for Linux operating systems? * Do you have experience and prefer ... Benefits for Interns These include 56 hours of Paid Sick and Safe Time, jury duty leave, and on ...

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Internship Operating Engineer information

See St Louis, MO salary details

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$18

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How much do internship operating engineer jobs pay per hour?

As of Aug 15, 2026, the average hourly pay for internship operating engineer in St. Louis, MO is $18.78, according to ZipRecruiter salary data. Most workers in this role earn between $15.67 and $20.34 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as an internship operating engineer?

To thrive as an Internship Operating Engineer, you need a foundational understanding of mechanical and electrical systems, safety protocols, and typically be pursuing or have a degree in engineering or a related technical field. Familiarity with building automation systems, HVAC controls, and maintenance management software is often expected. Strong problem-solving abilities, attention to detail, and effective teamwork and communication skills help interns excel in this hands-on environment. These skills ensure safe, efficient operation of building systems and support career development in facilities management.

What is the difference between Internship Operating Engineer vs Operating Engineer?

AspectInternship Operating EngineerOperating Engineer
CredentialsTypically pursuing or completed relevant technical training or certificationsHigh school diploma or equivalent; often requires licenses or certifications depending on state
Work EnvironmentEntry-level, training-focused, often in construction sites or facilitiesFull-time, hands-on work in construction, industrial, or facility settings
Employer & Industry UsageInternship programs in construction, utilities, or industrial firmsConstruction companies, industrial plants, utilities

The Internship Operating Engineer is an entry-level position designed for training and skill development, often part of an internship program. In contrast, the Operating Engineer is a fully qualified professional responsible for operating heavy machinery and managing equipment in various industrial settings. The internship provides foundational experience, while the operating engineer role involves independent work and greater responsibility.

What does an internship operating engineer do?

An Internship Operating Engineer assists in the operation and maintenance of building systems, such as heating, ventilation, air conditioning (HVAC), electrical, and plumbing. Interns often work under the supervision of experienced engineers to learn how to monitor equipment, perform routine inspections, and troubleshoot issues. This role provides valuable hands-on experience in facility management and building operations, preparing interns for a career as a licensed Operating Engineer. Responsibilities may also include helping with repairs, maintaining logs, and ensuring safety protocols are followed.

What types of projects or tasks can I expect to work on as an internship operating engineer?

As an Internship Operating Engineer, you can expect to assist with the operation, maintenance, and troubleshooting of mechanical and electrical systems in facilities such as commercial buildings or industrial plants. Typical tasks may include monitoring equipment performance, conducting routine inspections, supporting preventive maintenance schedules, and helping diagnose system issues under the guidance of experienced engineers. You will likely collaborate closely with senior operating engineers, facility management teams, and vendors, gaining hands-on experience that is valuable for future full-time roles in building operations or plant engineering.

What are popular job titles related to Internship Operating Engineer jobs in St. Louis, MO?

For Internship Operating Engineer jobs in St. Louis, MO, the most frequently searched job titles are:

What cities near St. Louis, MO are hiring for Internship Operating Engineer jobs?

Cities near St. Louis, MO with the most Internship Operating Engineer job openings:

2027 University Intern - Refining Engineer

Phillips 66

Roxana, IL

$2.5K - $3.4K/wk

Internship

Posted 3 days ago

New


Phillips 66 rating

7.2

Company rating: 7.2 out of 10

Based on 87 frontline employees who took The Breakroom Quiz

51st of 86 rated oil and gas companies


Job description

As a 2027 University Intern - Refining Engineer, you will gain hands-on experience through meaningful projects that help build your technical and professional skills at Phillips 66. Our Refining operations are comprised of global refining, marketing and transportation of petroleum products and related specialty businesses. Through its refining business segment, Phillips 66 is upgrading crude oil and other feedstocks into higher-value petroleum products including clean-burning gasoline, ultra-low-sulfur diesel, jet fuel, lubricants, petroleum coke and other specialty products while maintaining a high regard for safety and environmental limitations.

Summer internship activities may include the following:

  • Orientation, training events, field trips, social activities, weekly seminars and opportunities to meet and interact with functional business leaders and executives.
  • Participating in continuous coaching conversations with your manager, who will provide direction throughout your internship.
  • Provided with an assigned mentor for further guidance and to help you with the technical challenges of your role and give assistance in navigating through the day-to-day questions regarding working in the corporate world.
  • Giving a presentation at the end of the summer to senior business leaders and key stakeholders. This is an opportunity for you to demonstrate what you learned in your internship and provide insight on your experience.

Potential internship locations include: Linden, NJ; Lake Charles, LA; Roxana, IL; Ferndale, WA; Rodeo, CA; Borger, TX; Ponca City, OK; Sweeny, TX.

What You'll Do

An Engineering summer internship with Phillips 66 Refining will allow you opportunities to make contributions that support our Refining organizations:

  • Projects are chosen to provide a clear view of what an engineering professional does within Phillips 66. Areas of focus may include optimization of an existing process, improving energy efficiency, handling key logistics, improving equipment reliability, monitoring emissions or completing permit applications, optimizing the use of equipment by finding and eliminating defects, using sophisticated modeling and data analysis software tools. Each project will address an area of importance to the business.
  • Work side-by-side with experienced engineers and network with other interns.
  • An introduction to company practices, procedures and technical tools, technical training classes, participating in technical networks, and on-the-job training.

What You'll Bring - Required

  • Legally authorized to work in the job posting country
  • Currently enrolled in a Bachelor's or Master's degree program in Chemical Engineering, Mechanical Engineering, Electrical Engineering, Materials Science/Corrosion, Metallurgical Engineering, Civil Engineering, or equivalent field of study
  • Greater than 30 hours of earned college credit
  • Graduation date of August 2027 or later
  • Available for a minimum of eleven continuous weeks
  • Must be able, with or without reasonable accommodation, to maintain face daily so that a respirator/face mask can seal properly (some examples include being free of facial hair or clean shaven)
  • Willing and able to obtain a Transportation Worker Identification Card (TWIC)

What Makes You Stand Out - Preferred

  • A minimum cumulative GPA of 3.0 on a 4.0 scale
  • Previous internship with Phillips 66
  • Previous internship or co-op participant in related industry
  • Willing to work in any of our operating locations
  • Valid driver's license

Compensation Range 

This position has a pay range of $2,564 - $3,418 bi-weekly, dependent on a candidate's degree type and expected graduation date.

To apply and be considered:

  • Apply online by going to careers.phillips66.com. and complete the entire application process
  • Attach an electronic copy of your resume
  • Answer all prescreening questions and provide your eSignature

This position will be subject to a post-offer background check, which could include criminal history screening, in accordance with applicable federal, state, and local laws. We are committed to fair hiring practices and comply with all relevant regulations, including 'Ban the Box' and Fair Chance laws. All qualified applicants will be considered regardless of criminal history, and any background check will be conducted only after a conditional offer of employment has been made.

Candidates for regular U.S. positions must be a U.S. citizen or national, or an alien admitted as permanent resident, refugee, asylee or temporary resident under 8 U.S.C. 1160(a)(1). Individuals with temporary visas such as E, F-1, H-1, H-2, L, B, J, or TN or who need sponsorship for work authorization now or in the future, are not eligible for hire.

About Phillips 66

Providing Energy. Improving Lives. We are excited about the future of energy. Our advantaged and nimble company is full of seasoned leadership and talented teams making responsible choices to adapt and explore the opportunities the changing market brings. We do this while living out our values of safety, honor and commitment; improving lives by providing access to the energy which is essential to a high standard of living and health throughout the world. Our employees, suppliers and partners share this vision to provide energy and improve lives. Our hard work, and teamwork, keeps energy flowing. At Phillips 66, we know that now, more than ever, is the time to try new things.

Phillips 66 is an EEO and Affirmative Action Employer of Women/Minorities/Veterans/Individuals with Disabilities


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