Working at Ameren | Glassdoor

Ameren Overview

Saint Louis, MO
5001 to 10000 employees
Company - Public (AEE)
$5 to $10 billion (USD) per year
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 ... Read more

Mission: To power the quality of life.

Company Updates

  • We're proud to be certified as a Great Place to Work. Learn more about Ameren and what it's like to work here.

    Ameren Corporation


  • At Ameren, we're focused on building a diverse culture where opinions are shared and the best solutions are put into action. We're proud to be named one of America's Best Employers for Diversity by Forbes.

    America's Best Employers For Diversity

    Forbes worked with research firm Statista to compile the definitive list of the best employers for diversity in America. Statista surveyed 30,000 U.S. employees and did research on dimensions like a company's leadership team and board diversity to inform the list.

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Ameren – Why Work For Us?

Employing more than 8,500 co-workers throughout Illinois and Missouri, 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 Corporation (Ameren) is the parent holding company of:

  • Ameren Illinois, based in Collinsville, Illinois
  • Ameren Missouri, based in St. Louis, Missouri

Also included are the following operating entities:

  • Ameren Services, based in St. Louis, provides support services to the corporation.
  • Ameren Transmission Company, based in St. Louis, was formed in July 2010. It is dedicated to electric transmission infrastructure investment and expanding Ameren’s transmission system.

Learn more about Ameren at

Electricity and natural gas are critical in our daily lives. People require energy to heat and cool their homes, and run businesses and schools. The energy we provide is also needed to save lives and respond to emergencies. With such a vital purpose, Ameren strives to keep energy safe, reliable and reasonably priced for all. As a Fortune 500 company, we serve as an engine that powers economic investment and community improvement in Illinois and Missouri.

Every day, we're working hard to provide more reliable energy, reduce outages and restore power faster than ever before. It's all part of our ongoing commitment to keep pace with future energy needs, as we proudly continue to serve, support and invest in the communities we call home.

Ameren Illinois delivers electricity to 1.2 million customers in more than 1,200 communities with a service territory spanning 43,700 square miles. Ameren Illinois’ complex delivery system includes about 4,500 miles of electric transmission lines and 46,000 miles of distribution lines. The natural gas operations of Ameren Illinois rank as the state’s third largest natural gas distributor, serving 816,000 in central and southern Illinois. Ameren Illinois’ natural gas delivery system includes 18,200 miles of transmission/distribution mains and 12 underground storage fields with a total capacity of approximately 25 billion cubic feet.

Ameren Missouri provides electric service to approximately 1.2 million customers across central and eastern Missouri, including the greater St. Louis area. Ameren Missouri provides electric service to 63 counties and more than 500 towns. More than half (53 percent) of Ameren Missouri’s electric customers are located in St. Louis and St. Louis County. Ameren Missouri is also the state’s second largest distributor of natural gas. Ameren Missouri supplies natural gas service to approximately 130,000 customers. Ameren Missouri serves gas customers in more than 90 communities, including towns in southeast, central and eastern Missouri. The company owns 3,300 miles of natural gas transmission and distribution mains.

Our co-workers are our most valuable resource. Ameren would not exist without a well-trained, well-equipped team to carry out our shared mission: To Power the Quality of Life. Millions of people and thousands of businesses in Illinois and Missouri are counting on our people for dependable energy, 365 days a year. That compels us to keep our workforce safe and well; to prepare them to perform under challenging conditions; and to provide opportunities for both personal and professional growth. At the same time, we must nurture the next generation of talent in order to sustain our company and drive innovation.

What’s it like to work with us? Our workforce is dedicated to keeping the lights on and the gas flowing - 24 hours a day, 365 days a year. We focus that same kind of dedication on building a diverse culture where opinions are shared and the best solutions are put into action.

You’ll find we care about our employees as much as we care about our community. We’re committed to offering benefits, opportunities and enrichment that support our employees and our mission. Life at Ameren is based on our vision, mission, and values.

  • Vision: Leading the way to a secure energy future.
  • Mission: To power the quality of life.
  • Values: Our values - the way we do business - include safety, integrity, respect, accountability, stewardship, teamwork and commitment to excellence.

Careers at Ameren are as diverse and wide-ranging as the candidates we seek to fill them. Learn more about our diverse and inclusive work environment with competitive salaries, great benefits and ongoing professional training. 

We offer a variety of opportunities in the following fields:

  • Accounting and Finance
  • Administrative
  • Communications
  • Customer Service
  • Data Analytics
  • Engineering
  • Energy Delivery
  • Legal and Regulatory
  • Real Estate
  • And more

Providing energy to our customers in a safe, reliable, efficient and environmentally responsible manner requires a large, highly-skilled team of employees who embrace the Ameren commitment and their role in achieving it. 

Behind the scenes at Ameren, accountants, administrative and clerical, human resources, information technology, energy traders, corporate communications and security professionals maintain the daily operations of our corporation. Each of them is important to our success, and even though many of these professionals have little contact with our customers during the course of their work, it is still important that they embody our core values of integrity, respect, accountability, stewardship, teamwork and commitment to excellence because these values run deep throughout Ameren. 

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By almost any measure- size, assets, revenues, kilowatthour sales, or market value- Ameren Corporation ranks among the top 25% of the nation's utilities. 

Ameren's competitive, attractive and comprehensive benefits package reflects the corporation's size and stature as one of the nation's lowest-priced, highest-quality energy providers. 

Benefits include:

  • Medical, Dental and Vision Insurance
  • Paid Holidays, Vacations and Sick Leave
  • 401(k) and Cash Balanced Pension
  • Tuition Reimbursement
  • Career Growth and Individual Development Opportunities
  • Wellness Programs
  • Work- Life Employee Assistance Programs

Learn more about our benefits offering by visiting

Ameren Reviews

Rating TrendsRating Trends
Recommend to a friend
Approve of CEO
Ameren Chairman, President and CEO Warner L. Baxter
Warner L. Baxter
91 Ratings
  • Featured Review

    Helpful (1)

    "A Great Place to Work"

    • Work/Life Balance
    • Culture & Values
    • Career Opportunities
    • Comp & Benefits
    • Senior Management
    Former Employee - IT Compliance Associate in Saint Louis, MO
    Former Employee - IT Compliance Associate in Saint Louis, MO
    Neutral Outlook
    Approves of CEO

    I worked at Ameren full-time (More than 3 years)


    Great people and a desire to invest in the communities they serve.


    Since many employees stay with the organization for 20 years or more, there are some areas that lack process documentation to assist new employees when they are onboarded.

    Advice to Management

    Ensure succession planning is top of mind. The workforce is aging, so this will be critical in the near future.

See All 233 Reviews

Ameren Photos

Ameren photo of: Team huddle.
Ameren photo of: Co-workers watching the Solar Eclipse
Ameren photo of: Employee Resource Group, AMVE
Ameren photo of: Co-worker and military veteran, Crystal
Ameren photo of: Co-workers at LLS Walk
Ameren photo of: Intern and Co-op Symposium
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Ameren Interviews



Getting an Interview

Getting an Interview




  1. Featured Interview

    Helpful (2)  

    Cost Engineer Interview

    Anonymous Employee in Saint Louis, MO
    Accepted Offer
    Positive Experience
    Average Interview


    I applied through college or university. The process took 2 weeks. I interviewed at Ameren (Saint Louis, MO) in March 2017.


    It was a pretty standard interview. They do a quick phone screen to make sure everything is in order and you've got all the pre-requisites you need. Once you've gotten an in person interview, they'll bring you into the general office building in St. Louis for a behavioral interview where there will probably be about three people asking you questions. I've heard some interviews are as short as 30 minutes, mine was closer to an hour. They'll actually send you a list of example behavioral interview questions, which you should review because they will ask at least one or two that are on there. They also threw in a few technical questions for me at the end to see how proficient I was.

    Interview Questions

    • Tell us about a time you had interpersonal conflict with someone. How did it get resolved?   1 Answer
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Ameren Awards & Accolades

  • Top 5 Utilities for Diversity, DiversityInc, 2017
  • Great Place to Work Certified, Fortune, 2017
  • Best Place to Work for LGBTQ Equality, Human Rights Campaign’s (HRC) Corporate Equality Index, 2017
  • 50 Best Companies for Diversity, Black Enterprise Magazine, 2016
  • Top 100 Military Friendly Employer(28), G.I. Jobs Magazine, 2013
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