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Executive Leadership

Mark Birk

Mark 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 )

Kevin Anders

Kevin Anders

Ameren Missouri Vice President of Operations and Technical Services

Kevin Anders is vice president of Operations & Technical Services at Ameren Missouri. With more than thirty years of experience in the electric utility industry, Anders is responsible for the operation of the distribution system, maintenance of substations, engineering design, and management of major capital projects. Additionally, management of external contractors performing work on the Ameren Missouri distribution system, including tree trimming and vegetation management, are in Kevin's area of responsibility. ( more )

Matt Forck

Ryan Arnold

Ameren Missouri Vice President of Division Operations

Ryan M. Arnold was promoted to vice president, Division Operations in October 2021. He leads a team of co-workers responsible for the design, construction, and maintenance of Ameren Missouri's electric energy distribution systems, along with Fleet Operations. ( more )

Ajay Arora

Ajay K. Arora

Ameren Missouri Vice President, Chief Renewable Development Officer

Ajay Arora is Ameren's first Chief Renewable Development Officer. In this role, Arora is focused on implementing Ameren Missouri's transformational generation plan incorporating cleaner energy resources. ( more )

Stephanie Banker.

Stephanie P. Banker

Ameren Missouri Vice President of Nuclear Engineering and Support

Stephanie Banker is currently the vice president of Nuclear Engineering and Support at the Callaway Energy Center. She is responsible for the safe operation of the Callaway Energy Center by ensuring the plant is maintained and operated within its design and licensing basis. ( more )

Barry L. Cox

Nuclear Site Vice President – Callaway Energy Center Ameren Missouri

Barry Cox was named nuclear site vice president, Ameren Missouri, on January 1, 2020. In this role, Cox is responsible for the safe operation of the Callaway Energy Center. ( more )

Fadi M. Diya

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 )

Timothy E. Herrmann

Senior Vice President – Corporate Safety, Security and Operations Oversight Ameren Missouri

Timothy E. Herrmann was named senior vice president – Corporate Safety, Security and Operations Oversight, Ameren Missouri, in January 2020. In this role, Herrmann is responsible for corporate safety, security, crisis management, nuclear corporate oversight and project management. ( more )

Tara Oglesby

Tara K. Oglesby

Ameren Missouri Vice President of Customer Experience

As Vice President of Customer Experience, Tara K. Oglesby is responsible for effectively driving customer-focused strategies to ensure every interaction leads to a great customer experience. She is responsible for leading departments which play a critical role in delivering a satisfying experience including: Customer Service, Energy Efficiency & Renewables, Customer Intelligence and Smart Meter Strategy & Implementation. ( more )

Patrick Smith Sr.

Patrick E. Smith Sr.

Ameren Missouri Vice President of Economic, Community and Business Development

Patrick Smith Sr. was promoted to vice president of Economic, Community and Business Development for Ameren Missouri Oct. 1, 2021. He leads a team focused on driving energy solutions, including customer renewable energy and sustainability options, clean electrification, and community and economic development, to create sustainable growth for the 500 communities Ameren Missouri serves. ( more )

Warren Wood

Warren T. Wood

Ameren Missouri Vice President of Regulatory & Legislative Affairs

Warren Wood joined Ameren Missouri as vice president, Legislative and Regulatory Affairs in 2010. In this role, he oversees state legislative and regulatory policy development and compliance for the company. Wood is a registered professional engineer with a background in utility infrastructure design, construction and operation, and energy policy development. ( more )

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