Energy at Work

Richard J. Mark

President - Ameren Illinois

Richard J. Mark

Richard Mark is Chairman and President of Ameren Illinois Companies where he is responsible for energy delivery to more than 1.2 million electric and 816,000 natural gas customers.  Richard joined Ameren in 2002 as Vice President of Customer Service.  In 2003, he became Vice President of Governmental Policy and Consumer Affairs. In just two short years, he rose to the position of Senior Vice President of Ameren Missouri Energy Delivery - becoming the first African American to hold this position.  Before his appointment as President of Ameren Illinois in 2012, Richard was Senior Vice President of Ameren Missouri Customer Operations with responsibility for electric and natural gas distribution.

In six years as the leader of Ameren Illinois, Richard has been instrumental in passing legislation and shaping regulatory policy that is transforming the energy sector in Illinois.  He is currently leading a bold initiative that will expand access to energy efficiency programs and cost-saving saving tools for all customers, while paving the way for greater access to renewable energy.  Under his direction, Ameren Illinois is undertaking a massive overhaul of the Illinois electric grid, installing smart technologies, improving reliability, and creating thousands of jobs in communities throughout central and southern Illinois.  

Prior to joining Ameren, Richard served six years as president and chief executive officer of St. Mary’s Hospital in East St. Louis and five years as chief operating officer. He also led the East St. Louis District 189 Financial Oversight Panel. 

Richard has received three honorary doctorate degrees for his civic and community work along with numerous awards and honors.  Most recently, he received the Leadership Award from the Springfield NAACP, the Visionary Award from the Foundation Fighting Blindness, and was named one of the Most Powerful Executives in America by Black Enterprise Magazine.  In 2017, Richard received the Heritage Award from the Illinois Legislative Sportsman Caucus.  Other honors include Illinois Black Chamber of Commerce's Outstanding Corporate Leadership Award (2015), African-American Career World magazine's Top 10 national business leaders (2015), a Telly Award for Ameren’s Employee Communications video magazine (2015), and Who’s Who in Energy recognition by the St. Louis Business Journal (2015).  He was named one of Savoy Magazine’s Top 100 Most Influential Blacks in Corporate America for 2016 & 2014.

Richard serves on a variety of boards and organizations including Tenet Healthcare, Abraham Lincoln Presidential Library Foundation Board, Madison Mutual Insurance Board, Leadership Council of Southwestern Illinois, Saint Louis Zoo Association, Fontbonne University, the St. Louis Police Foundation and the St. Louis Regional Business Council.

Ronald D. Pate

Senior Vice President, Operations and Technical Services - Ameren Illinois

Ronald D. Pate

Ron Pate is Senior Vice President of Operations and Technical Services for Ameren Illinois Company (Ameren Illinois). Ameren Illinois serves 1.2 million electric and more than 812,000 natural gas customers in a 43,700-square-mile area of Illinois.

In his current role, Mr. Pate is responsible for the oversight and support of all electric and natural gas field operations; including subtransmission and distribution maintenance, engineering design, safety and training, reliability planning, dispatch operations, electrical and natural gas emergency response, and construction services for Ameren Illinois.

As a member of Ameren Illinois’ executive leadership team, Mr. Pate has previously been Vice President of Regional Operations, Vice President of Delivery System Operations & Development, Vice President of Asset Performance and Compliance Management, Vice President of Utility Operations, and Vice President of Operations and Technical Services.  He has 39 years’ experience in the utility business, during which he has held numerous positions on both the electric and natural gas sides of the business.  Mr. Pate joined AmerenIP in 1978.

He is past Chairman of the Illinois Energy Association and remains a board member, currently serves on the Boards of the Midwest Energy Association, Big Brothers/Big Sisters of Macon County and Gas Technology Institute Operations Technology Development.  He is on the Electric Power Research Institute’s Power Delivery & Utilization Committee and the American Gas Association’s Operations Managing Committee.

Mr. Pate earned a bachelor’s degree in business management from Southern Illinois University in Carbondale, Illinois, and completed an Executive Leadership Program from the University of North Carolina at Chapel Hill.

Craig D. Nelson

Senior Vice President, Regulatory Affairs and Financial Services - Ameren Illinois

Craig D. Nelson
Craig D. Nelson
Craig Nelson is senior vice president, Regulatory Affairs and Financial Services for Ameren Illinois. In this role, he directs power procurement, financial analysis/reporting, regulatory and rates, and external affairs for Ameren Illinois.    

Nelson began his career as a tax consultant with Arthur Andersen & Company, an accounting and management consulting firm. He joined Central Illinois Public Service Company (CIPS) in 1979 as a tax accountant. He assumed positions of increasing responsibility, including serving as treasurer of CIPS and vice president of Corporate Planning for Ameren Corporation.

Nelson serves on the Illinois Energy Association Strategic Issues Group and the Heartland Partnership CEO Council. He served on the Board of Trustees of the St. Louis Science Center until his transfer to Peoria. Nelson now serves on the Board of Directors of the American Red Cross - Central Illinois Chapter. 

Nelson earned a bachelor’s degree in accounting in 1977, graduating with highest honors, and a Master in Business Administration in 1984. Both degrees were awarded by Southern Illinois University-Edwardsville, in Illinois. He is a certified public accountant.

Theresa A. Shaw

Vice President, Regulatory Affairs & Financial Services

Theresa Shaw is Vice President of Regulatory Affairs and Financial Services for Ameren Illinois.  In this role, Theresa is responsible for leading power and natural gas procurement; energy efficiency programs; financial analysis and reporting; budgeting; regulatory affairs; regulatory policy, compliance, and strategy; and rates functions for Ameren Illinois.  Before her current position, Theresa served as the Vice President of Internal Audit for Ameren Corporation, providing independent, objective assurance and consulting services to improve Ameren’s operations and assist senior management in achieving business objectives.

Theresa joined Ameren Corporation in 2002 as a Supervisor of Investor Relations and Financial Communications.  She was promoted into various accounting and reporting positions of increasing responsibility, including her appointment in in 2012 as the Assistant Vice President and Controller of Ameren Corporation, with responsibility for external financial reporting, plant accounting, power and fuel accounting, general accounting and corporate management reporting.

Prior to joining Ameren, Theresa worked at PricewaterhouseCoopers for seven years, where she attained the position of experienced audit manager, providing audit services to a variety of private and Fortune 500 public companies

A certified public accountant, Theresa earned a Bachelor of Science degree in accountancy with a minor in German from the University of Missouri – Columbia, where she graduated summa cum laude, and a Master's of Business Administration from Washington University in St. Louis.  She is a member of the American Institute of Certified Public Accountants.  

D. Scott Wiseman

Vice President, External Affairs - Ameren Illinois

D. Scott Wiseman
D. Scott Wiseman is vice president, External Affairs for Ameren Illinois. In this role, he oversees government relations and community and public relations. Ameren Illinois serves 1.2 million electric and 816,000 natural gas customers in more than 1,200 Illinois communities.

Prior to joining Ameren Illinois, Mr. Wiseman was senior vice president, State Affairs and Outreach for the American Coalition for Clean Coal Electricity, a national industry organization educating decision makers on energy and environmental policies at the regional, state, and local levels. In this role, Mr. Wiseman had industry leadership roles on issues such as energy policy, multi-emissions proposals, climate change, mercury and regional haze. 

From 2001 to 2005, Mr. Wiseman served as the executive director of the Illinois Commerce Commission (ICC), leading the agency that has regulatory oversight of investor-owned utilities, including telecommunications, electricity, water and gas companies; and statutory oversight of transportation issues, such as railroad crossing safety, motor carrier insurance, household goods moving and towing companies.

While at the ICC, Mr. Wiseman also held several positions at the national level, serving as chairman of the National Association of Regulatory Utility Commissioners Staff Subcommittee on Executive Management, the Advisory Board of the Regulatory Information Technology Consortium, the Research Advisory Board of the National Regulatory Research Institute at Ohio State University and the Illinois Human Rights 211 Collaboration Board.

Prior to joining the ICC, Mr. Wiseman was chief of staff at the Illinois Department of Revenue and held various positions in Illinois state government beginning in 1987, the same year he graduated with honors from Western Illinois University. Mr. Wiseman holds a Bachelor of Science degree in Political Science and has completed advanced Leadership and Executive Management courses at the University of Virginia.

Wiseman currently serves on the board of directors of the Electric Energy Council and Springfield SPARC.

In his community, he serves on the board of the Chatham Youth Basketball Association and volunteers time to coach basketball for Chatham youth leagues.

James C. Blessing

Assistant Vice President, Regulatory Policy & Energy Supply - Ameren Illinois

Jim Blessing is Assistant Vice President, Regulatory Policy and Energy Supply for Ameren Illinois.  In this role, he directs power procurement, natural gas procurement, gas control, regulatory policy & rates, and Energy Efficiency for Ameren Illinois.  Mr. Blessing began his career as a plant electrical engineer at Southern Indiana Gas and Electric Co. and then as a Field Electrical Engineer in General Electric's Power Generation Services division.  He joined Union Electric in 1994 and has held numerous positions within Union Electric, Ameren Services and Ameren Illinois on both the electric and gas side of the business.

Blessing earned a bachelor's of science degree in electrical engineering from the University of Missouri-Rolla in 1984 and a masters of business administration from St. Louis University in 1994

Eric M. Kozak

Vice President, Gas Operations - Ameren Illinois

Eric M. Kozak
Eric M. Kozak is vice president gas operations for Ameren Illinois.  Kozak is responsible for the engineering and operations of over 18,200 miles of transmission and distribution gas lines and 12 underground natural gas storage fields.

Kozak has a diverse background in utility operations.  He started his career as a gas planner in Decatur Illinois in 1990.  Since that time he has worked out of eight different offices from Jacksonville to East St. Louis.  He held various leadership positions in several areas including fleet services construction services, electric operations, and vegetation management.

Kozak serves on the Board of Directors for the MEA Energy association and is a member of the Operations Technology Development committee.   He volunteers his time for a variety of organizations in Southern Illinois including being a ready reader. Kozak earned a Bachelor of Science Degree from the University of Missouri – Rolla in 1989. 

Michael G. Mueller

Vice President, Economic Development - Ameren Illinois

Michael G. Mueller has more than 32 years of energy experience with Ameren Corporation. Mueller was recently named Vice President Economic Development, Ameren Illinois. Prior to this position, he served as Vice President, Economic & Technology Development, Ameren Services since 2015. In that role he was responsible for Economic Development for Ameren Corporation, led customer relation efforts with large commercial and industrial customers in Ameren Missouri and helped lead Innovative Technology efforts for Ameren.

Mueller was Vice President, Energy Management & Trading for Ameren Missouri from 2011-2015. In this role, he was responsible for energy trading and the procurement and transportation of all coal, natural gas, oil and emissions control commodities for Ameren Missouri. He was also responsible for the management of plant emissions, coal combustion by-products, and other fuel related development efforts, including Ameren Missouri’s Renewable Energy program.

Mueller joined Ameren Missouri (formerly known as Union Electric Company) in 1986 as an Engineer in Corporate Planning. Over the next several years, he served in various roles involving fossil fuels, power trading and generation. In 2004, Mueller was promoted to President of Ameren Energy Fuels & Services (AFS), a position he held until 2011, when AFS was absorbed into the three operating companies of Ameren. In 2011, he joined Ameren Missouri as Vice President of Energy Management & Trading leading the combined Fuel, Power and Energy Commodities trade groups for Ameren Missouri.

Mueller earned a Bachelor of Science degree in Mechanical Engineering from the University of Missouri – Rolla in 1986 and acquired his MBA from Southern Illinois University – Edwardsville in 1992.

Mueller currently serves on the Missouri Partnership Board, the Coalition Board of BioSTL and the I-Cares Committee of Washington University. He is also serving as Exec VP on the Board of United 4 Children and recently completed over 12 years of board and committee service for United Way.
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