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Ameren Overview
Saint Louis, MO
5001 to 10000 employees
Company - Public (AEE)
Oil, Gas, Energy & Utilities
$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

  • Diversity and inclusion are key drivers of business success and innovation. We're committed to them and are honored that DiversityInc has named us number one in diversity among utilities nationwide for the third consecutive year.

  • Proud to announce our president and CEO, Warner Baxter, has been named chair and director of Electric Power Research Institute, helping inform the development of industry research and supporting innovative energy technology.

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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
51 Ratings
  • Featured Review

    Helpful (4)

    "Great energy company"

    Star Star Star Star Star
    • Work/Life Balance
    • Culture & Values
    • Career Opportunities
    • Comp & Benefits
    • Senior Management
    Current Employee - Engineer in Saint Louis, MO
    Current Employee - Engineer in Saint Louis, MO
    Approves of CEO

    I have been working at Ameren full-time (Less than a year)


    Very stable company with great benefits. Company cares very well about employee safety. Salary is very good and is usually above average for entry levels. Very close community, senior employees always ready to help newer ones who may not be up to speed.


    For certain engineering disciplines, it might be a little restricted.

    Advice to Management

    Keep up the good work, especially your concern about employee safety.

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Ameren Interviews



Getting an Interview

Getting an Interview





    Accepted Offer
    Neutral Experience
    Easy Interview


    First a phone call, then a brief interview for a culture fit assessment, then Common Behavioral Interview - by the specific situation, task, action, and result of the situation, followed by a technical interview.

    Interview Questions

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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 7 Utilities for Diversity, DiversityInc, 2016
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