Ameren is a leader in the energy industry, and our transformation toward more clean, renewable energy is also transforming other industries and infrastructure in our communities. As a regional company serving local customers, we not only serve our communities, we're a part of them. This isn't just a job. At Ameren, we invest in you, so you can power the quality of life you want.
Visit our Benefits & Perks Page for more information on benefits provided to regular, full-time employees.
It's an exciting time to be a part of the evolving energy industry! Ameren's collegiate internship and co-op program is all about providing real work experience, networking opportunities, and professional growth.
Ameren Corporation is a Fortune 500 company that trades on the New York Stock Exchange under the symbol AEE. It is the parent company of Ameren Illinois, based in Collinsville, Ill., and Ameren Missouri in St. Louis. Ameren Transmission Company, also based in St. Louis, designs and builds regional transmission projects.
Employing more than 9,000 personnel, Ameren powers the quality of life for 2.4 million electric customers and more than 900,000 natural gas customers across a 64,000-square-mile area. Ameren Missouri ranks as the largest electric power provider in Missouri, and Ameren Illinois ranks as Illinois' third largest natural gas distribution operation in total number of customers.
This general posting will be used to collect applications for our 2026 Mechanical Engineer Summer Internship openings across the states of Illinois and Missouri.
The options for collegiate employment are:
May – August Co-Op
Growth Potential
Ameren responds to our changing industry by providing new solutions for tomorrow's energy needs. All collegiate coworkers directly impact Ameren's mission to Power the Quality of Life.
Locations
Ameren is located throughout Missouri and Illinois. Location decisions will be made as soon as possible during the hiring process. If you are selected for an intern or co-op position, please note that Ameren does offer a housing stipend to interns and co-ops who are temporarily relocating, if minimum housing stipend requirements (living & attending school 50+ miles away from your working location) are met.
Qualifications
Must be a current student pursuing a Bachelors or Masters in Mechanical Engineering from an accredited college or university required with a cumulative GPA of 2.5 or above.
We will provide more information about each opportunity at time of interview.
Compensation:
We take into consideration a variety of factors including, but not limited to, skills, abilities, experience, education, credentials, and internal equity when determining the salary offered.
$19.00 - $29.00If end date is listed, the posting will come down at 12:00 am on that date:Friday April 17, 2026All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, ethnicity, age, disability, genetic information, military service or status, pregnancy, marital status, sexual orientation, gender identity or expression, or any other class, trait, or status protected by law.
Top Skills
What We Do
We're Ameren Corporation (AEE), a St. Louis-based, Fortune 500 company that powers the quality of life for millions of people throughout Illinois and Missouri.
Ameren Illinois provides electric distribution and transmission service, as well as natural gas distribution service, while Ameren Missouri provides vertically integrated electric service, with generating capacity of over 10,200 megawatts, and natural gas distribution service. Combined, we serve 2.4 million electric and more than 900,000 natural gas customers in a 64,000 square mile area. We're the largest electric utility in Missouri and the second largest in Illinois, and we're among the nation's largest investor-owned electric or gas utility.
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