Thomas R. Voss 64 Chairman, President and Chief Executive Officer, and Director
Voss joined Ameren Missouri in 1969. He was elected senior vice president of
Ameren Missouri, CIPS, and Ameren Services in 1999, of Genco in 2001, of CILCO
in 2003, and of IP in 2004. In 2003, Voss was elected president of Genco; he
relinquished his presidency of this company in 2004. In 2006, he was elected
executive vice president of Ameren Missouri, CIPS, CILCO and IP. In 2007, Voss
was elected chairman, president, and chief executive officer of Ameren Missouri.
He relinquished his positions at CIPS, CILCO and IP in 2007. In 2009, Voss was
elected president and chief executive officer of Ameren; at that time, he relinquished
his other positions. In 2010, the Ameren board of directors elected Voss to
the position of chairman of the board. He has been a member of the Ameren board
since 2009.
Martin J. Lyons, Jr. 45 Senior Vice President and Chief Financial Officer
Lyons joined Ameren, Ameren Missouri, CIPS, Genco, and Ameren Services in 2001
as controller. He was elected controller of CILCO in 2003. He was also elected
vice president of Ameren, Ameren Missouri, CIPS, Genco, CILCO, and Ameren Services
in 2003 and vice president and controller of IP in 2004. In 2007, his positions
at Ameren Missouri were changed to vice president and principal accounting officer.
In 2008, Lyons was elected senior vice president and principal accounting officer
of the Ameren Companies. In 2009, Lyons was also elected chief financial officer
of the Ameren Companies. With the Ameren Illinois Merger in 2010, Lyons remained
senior vice president, chief financial officer and principal accounting officer
at Ameren Illinois.
Gregory L. Nelson 54 Senior Vice President, General Counsel and Secretary
Nelson joined Ameren Missouri in 1995 as a manager in the tax department and
assumed a similar position with Ameren Services in 1998. Nelson was elected
vice president and tax counsel of Ameren Services in 1999 and vice president
of Ameren Missouri, CIPS, CILCO and Genco in 2003 and of IP in 2004. In 2010,
Nelson was elected vice president, tax and deputy general counsel of Ameren
Services. He remained vice president of Ameren Missouri, CIPS, CILCO, IP and
Genco. With the Ameren Illinois Merger in 2010, Nelson remained vice president
at Ameren Illinois. Effective March 2, 2011, Nelson was elected to the positions
of senior vice president and general counsel of Ameren, Ameren Missouri, Ameren
Illinois, Genco and Ameren Services. Effective May 1, 2011, Nelson was elected
to the position of secretary.
Jerre E. Birdsong 57 Vice President and Treasurer
Birdsong joined Ameren Missouri in 1977 and was elected treasurer of Ameren
Missouri in 1993. He was elected treasurer of Ameren, CIPS, and Ameren Services
in 1997 and of Genco in 2000. In addition to being treasurer, in 2001 he was
elected vice president at Ameren, Ameren Missouri, CIPS, Ameren Services and
Genco. Additionally, he was elected vice president and treasurer of CILCO in
2003 and of IP in 2004. With the Ameren Illinois Merger in 2010, Birdsong, remained
vice president and treasurer at Ameren Illinois.
Ameren Corporation currently has 17000 employees.
