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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

  • 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.

  • Our co-workers are teaming up with the St. Louis-area Society for Information Management to help women in IT careers gain mentors on their path to success. More resources for IT career-seekers are available

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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 (2)

    "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.

See All 147 Reviews

Ameren Interviews



Getting an Interview

Getting an Interview





    Operations Support Interview

    Anonymous Interview Candidate
    Declined Offer
    Positive Experience
    Average Interview


    I applied online. The process took 2+ months. I interviewed at Ameren in February 2017.


    Phone interview was easy, just basic information about yourself. Behavioral interview a little intimidating, Ameren uses the SHARE method. As long as you prepare yourself ahead of time you will do fine.

    Interview Questions

    • Describe a time when you had to multi-task to help a situation?   1 Answer
    • Why I was seeking a different job?   1 Answer
See All 71 Interviews

Ameren Awards & Accolades

  • Best Place to Work for LGBTQ Equality, Human Rights Campaign’s (HRC) Corporate Equality Index, 2017
  • Top 7 Utilities for Diversity, DiversityInc, 2016
  • 50 Best Companies for Diversity, Black Enterprise Magazine, 2016
  • Disability Equality Index Best Places to Work, Disability Equality Index (DEI), 2016
  • Top 50 Employers, Women Engineer Magazine, 2016
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