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Executive Leadership

Marty Lyons

Chairman, President and Chief Executive Officer, Ameren Corporation

Marty Lyons was named president and chief executive officer of Ameren Corporation and a member of the board of directors effective January 1, 2022. Lyons was previously chairman and president of Ameren Missouri, a position he held for two years after previously serving 18 years in a variety of positions within Ameren. ( more )

Mark Birk - Senior Vice President, Customer and Power Operations, Ameren Missouri

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 )

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 )

Michael 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 )

Shawn Schukar - Chairman and President, Ameren Transmission Company

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 )

Fadi Diya - Senior Vice President and Chief Nuclear Officer, Ameren Missouri

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 Lindgren - Senior Vice President, Corporate Communications and Chief Human Resources Officer, Ameren Services

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 Mizell

Senior Vice President, Chief Sustainability, Diversity & Philanthropy Officer, Ameren Services

Gwen Mizell is the senior vice president, chief sustainability, diversity and philanthropy officer for Ameren Corporation, further aligning her leadership, expertise and engagement to oversee and advance the company's impacts across these interconnected areas. The role is an expansion of Mizell's previous duties as the company's chief sustainability and diversity officer, and previous role as vice president of sustainability and innovation. ( more )

Chonda Nwamu

Executive Vice President, General Counsel and Secretary, Ameren Corporation

Chonda Nwamu is executive vice president, general counsel & secretary for Ameren Corporation. Nwamu is the primary legal advisor to Ameren's Board of Directors and senior management, and she leads the General Counsel function, which includes the company's legal, corporate governance, federal regulatory and legislative affairs, and enterprise ethics and compliance departments. She also serves on Ameren's Executive Leadership Team as a contributor to overall strategic direction of the Company. ( more )

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