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Ameren Overview

Saint Louis, MO
5001 to 10000 employees
Company - Public (AEE)
$5 to $10 billion (USD) per year
St. Louis-based Ameren Corporation powers the quality of life for 2.4 million electric customers and more than 900,000 natural gas customers in a 64,000-square-mile area through its Ameren Missouri and Ameren Illinois rate-regulated utility subsidiaries. Ameren Illinois provides ... Read more

Mission: To power the quality of life.

Company Updates

  • We know that building a diverse culture where opinions are shared makes us a better company. We're proud to be recognized by Black Enterprise as one of the 50 best companies for diversity in the nation for the second consecutive year.

    Presenting Our "50 Best Companies for Diversity 2018" List

    BLACK ENTERPRISE, in collaboration with The Executive Leadership Council, the leading organization of black senior managers, has released its annual listing of the 50 Best Companies for Diversity as featured in the publication's November/December 2017 issue. These 50 companies recognize the value of the link between diversity and engagement, which is driven by corporate leadership at the highest level.

  • Congratulations to our co-workers, who are 2017 YWCA Leaders in the Workplace Award recipients. They've been honored for professional excellence and being role models in the workplace.

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Ameren – Why Work For Us?

All About Ameren

Every day, Ameren is 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.

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 integrity, respect, accountability, stewardship, teamwork and commitment to excellence.

Ameren Facts and Figures

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. 

Ameren was created by the combination of three Illinois utilities (CIPSCO Incorporated, CILCO Inc. and Illinois Power Company) and Union Electric Company of St. Louis. The name comes from combining the words American and Energy.

Employing more than 8,500 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.

Ameren companies generate a net capacity of nearly 10,200 megawatts of electricity and own more than 7,500 circuit miles of transmission lines.

Our Businesses

The business segments of Ameren Corporation are listed below:

Ameren Services
Provides shared services for all of Ameren Corporation.

Ameren Illinois
Delivers electric and natural gas services in Illinois.

Ameren Missouri
Operates energy centers and provides electric and natural gas services in Missouri. Includes:

  1. Ameren Missouri Energy Management & Trading - procures and transports fuel and manages renewable energy programs and emissions.
  2. Ameren Missouri Wholesale (Ameren Missouri Asset Management & Trading) - offers wholesale power and other services.

Ameren Transmission
Invests and develops new transmission projects within the region.

Ameren Reviews

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Ameren Chairman, President and CEO Warner L. Baxter
Warner L. Baxter
61 Ratings
  • "Transmission"

    • Work/Life Balance
    • Culture & Values
    • Career Opportunities
    • Comp & Benefits
    • Senior Management
    Current Employee - Anonymous Employee
    Current Employee - Anonymous Employee
    Positive Outlook
    Approves of CEO

    I have been working at Ameren full-time


    Thought diversity culture
    Strong management
    Positive morale


    Workload spikes at end of year

    Advice to Management

    Need to spread workload throughout the calendar year

See All 173 Reviews

Ameren Photos

Ameren photo of: Team huddle.
Ameren photo of: Hosting a networking session at our headquarters for women in IT.
Ameren photo of: Stocking storm trailers ahead of severe weather to safely respond to outages as quickly as possible.
Ameren photo of: Encouraging diverse suppliers throughout the region.
Ameren photo of: Co-workers monitoring our system from a control room.
Ameren photo of: Talking about careers in energy with St. Louis area high school students.
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Ameren Interviews



Getting an Interview

Getting an Interview




  1. Featured Interview


    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
  • 2017 Disability Equality Index® Best Places to Work, American Association of People with Disabilities, 2017
  • 50 Best Companies for Diversity, Black Enterprise Magazine, 2016
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