Thomas R. Voss 
Ameren Corporation
Chairman of the Board and Chief Executive Officer

Thomas R. Voss was elected to the position of chairman of the board of directors of Ameren Corporation on April 27, 2010. He was elected president and chief executive officer of Ameren in May 2009 - titles he retained with his promotion to the position of board chairman. Voss served as executive vice president and chief operating officer of Ameren from 2004 to 2009. In December 2006, he was elected to the additional position of president and chief executive officer of Ameren’s Missouri rate-regulated operations.

Prior to this appointment, he held the title of senior vice president, Generation, and president, Ameren Energy and Ameren Energy Resources (now acquired by an affiliate of Dynegy). In this position, he was responsible for generation, fuels and services and related trading and marketing operations.
Previously, he served as senior vice president for Energy Delivery/Customer Services. In this position, Voss was responsible for the design, construction, operation and maintenance of all gas and electric delivery systems and also for all customer care activities for Ameren’s operating utility companies.

Voss began his career with Union Electric (now known as Ameren Missouri) in 1969 as a student engineer after earning a bachelor’s degree in electrical engineering from the University of Missouri-Rolla. After four years in the U.S. Air Force, he returned to Union Electric as an assistant engineer. From 1975-1998, he held a series of successively higher positions - moving from engineer to staff engineer, superintendent, district manager and operating manager. He was named vice president, Region Operations for AmerenCIPS (now part of Ameren Illinois) in July 1998.

Voss is also a graduate of the University of Michigan’s Public Utility Executive Program and the Westinghouse Advanced Power Systems School. In addition, in June 2005, he completed the Reactor Technology Course for Utility Executives - an intensive three-week program on nuclear technology offered through the Massachusetts Institute of Technology in Cambridge, Mass., and the National Academy for Nuclear Training. Voss is a registered professional engineer in Missouri and Illinois.

He serves on several St. Louis area civic and arts organizations, including Civic Progress, Dance St. Louis (Chairman Emeritus), The MUNY and St. Louis Regional Chamber as well as national industry boards of EEI (executive committee) and AEIC (current president). Voss chairs the board of the Regional Chamber and Growth Association and also serves on several national industry boards. In November 2010, Voss was elected to the board of directors of the National Merit Scholarship Corporation.

He has been a champion of diversity both within and outside Ameren Corporation.

A native of St. Louis and a graduate of St. Louis University High School, Voss and his wife Carol have three children and four grandchildren.
Ameren, Tom Voss, Thomas Voss, Thomas R. Voss, CEO, chief executive officer, executive leadership
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