Executive Leadership
Martin J. Lyons Jr.
Chairman, President and Chief Executive Officer, Ameren Corporation
Marty Lyons is Chairman, President and Chief Executive Officer of Ameren Corporation, parent company of Ameren Illinois, Ameren Missouri and Ameren Transmission Company. 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. ( more )
Michael L. Moehn
Senior Executive VP and CFO, Ameren Corp., President, Ameren Services
Michael L. Moehn is senior executive vice president (SEVP) and CFO of Ameren Corp., and president of Ameren Services. In this role, Moehn is responsible for all aspects of Ameren's financial affairs including Investor Relations, Financial Reporting, Accounting, Tax, Treasury, Internal Audit, and capital allocation and capital market activities. He also oversees Strategy, Mergers and Acquisitions, Enterprise Risk Management, Supply Chain, Corporate Nuclear Oversight, and Digital and Customer Experience. Moehn became CFO, executive vice president and president of Ameren Services on Dec. 1, 2019, and was promoted to SEVP in 2023. ( more )
Mark C. Birk
Chairman and President, Ameren Missouri
Mark Birk is chairman and president of Ameren Missouri, an electric and natural gas delivery utility subsidiary of Ameren Corporation and Missouri's largest utility. Birk has held many leadership positions in his more than 35-years at Ameren, including progressively more responsible roles overseeing customer and power operations, energy delivery, strategic planning, energy trading, enterprise risk management, safety and nuclear corporate oversight. ( more )
Shawn E. Schukar
Chairman and President, Ameren Transmission Company of Illinois
Shawn Schukar is chairman and president of Ameren Transmission Company of Illinois (ATXI), a subsidiary of Ameren Corporation dedicated to electric transmission infrastructure investment. ( more )
Leonard "Lenny" Singh
Chairman and President, Ameren Illinois
Leonard "Lenny" Singh is chairman and president of Ameren Illinois, where he is responsible for energy delivery to more than 1.2 million electric and more than 800,000 natural gas customers encompassing 1,200 communities across 43,700 square miles. ( more )
Fadi M. Diya
Senior Vice President and Chief Nuclear Officer, Ameren Missouri
Fadi Diya is senior vice president and chief nuclear officer (CNO) for Ameren Missouri. Diya is responsible for all of Ameren Missouri's nuclear operations. ( more )
Mark C. Lindgren
Executive Vice President, Corporate Communications and Chief Human Resources Officer, Ameren Services
Mark C. Lindgren is executive vice president of corporate communications and chief human resources officer for Ameren. In his current role, he serves on the Executive Leadership Team and is responsible for Ameren's workforce strategy, human resources, and corporate communications; which includes marketing, public relations and other internal and external communications. ( more )
Gwen G. Mizell
Senior Vice President, Chief Sustainability Officer, Ameren Services
Gwen Mizell is Senior Vice President, Chief Sustainability Officer and a member of the Executive Leadership Team for Ameren Corporation. She is responsible for developing and executing the company’s sustainability strategy and optimizing collective inclusive impacts across the enterprise. ( more )
