Executive Leadership
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 )
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 )
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 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 )
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
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 )
Tara K. Oglesby
Ameren Missouri Vice President of Economic, Community and Business Development
Tara K. Oglesby became Ameren Missouri's Vice President of Economic, Community and Business Development on Dec. 1, 2022. She leads a team focused on driving energy solutions, including customer renewable energy and sustainability options, clean electrification, energy efficiency, and community and economic development, to create sustainable growth for the communities Ameren Missouri serves. ( more )
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 )
