Executive Leadership Team

Austin Energy is part of the City of Austin, with budget and policy oversight by the Austin City Council. Our utility has nationally-recognized energy efficiency and renewables programs, excellent reliability, and competitive rates. The City Manager selects the General Manager, who hires the executive team. The team leads our public power utility in its mission to safely deliver clean, affordable, reliable energy and excellent customer service. 

Jackie Sargent

Jackie Sargent

General Manager

Jackie Sargent rejoined the Austin Energy team as General Manager in August 2016. She brings almost 30 years of utility experience, as well as the focus and passion to continue the utility’s cutting edge reputation while providing tremendous community benefits.

From 2010 to 2012, Sargent served as Senior Vice President of Power Supply and Market Operations at Austin Energy before joining Platte River Power Authority in Fort Collins, Colorado, as General Manager and CEO. Sargent also served as Vice President of Power Supply and Renewables Integration for Black Hills Corporation in South Dakota.

Throughout her career, Sargent has demonstrated leadership by working with teams to accomplish goals and plan for the future. Some notable accomplishments include managing major construction projects, developing resource plans, supporting acquisitions and mergers, leading utility rate cases, negotiating power purchase and sale agreements, developing and growing energy marketing departments, integrating renewable resources, and creating collaborative energy efficiency programs.

Sargent believes Austin Energy can be a great value to its customers by focusing on these five core values: safety, financial integrity, operational excellence and reliability, exceptional customer service, and engaged employees. A strong financial base along with operational excellence allows a publicly owned utility to be competitive while creating value for the community. By continuing Austin Energy’s standard of exceptional reliability and advancements in grid technology, the utility will be able to offer new levels of communication and collaboration with its customers. But these achievements can only happen with engaged employees in a safe environment that extends to the customers the utility serves.

Sargent is a licensed professional engineer and holds a Bachelor of Science in Electrical Engineering and a Master of Science in Technology Management from South Dakota School of Mines and Technology.

Stuart Reilly

Stuart Reilly

Chief of Staff

Stuart Reilly joined Austin Energy as Chief of Staff in January 2019. His role focuses on the utility's broad organizational policies and strategic initiatives as well as coordinating projects, supporting process improvements, and managing the activities of the General Manager's office.

Previously, Reilly served Austin Energy as an attorney with the City of Austin Law Department, providing legal advice and support to executives and management on a wide range of electric utility matters. He specialized in utility regulations, transactions, customer programs, and renewable energy.

Reilly holds a Bachelor of Arts in Government from the University of Texas at Austin and a Juris Doctor degree from George Washington University Law School.


Charles Dickerson

Charles Dickerson

Deputy General Manager and Chief Operations Officer

Charles Dickerson currently serves as Chief Operating Officer and Deputy General Manager of Austin Energy, the nation’s third largest municipal electric utility. As a passionate builder of high-performing teams, he is responsible for Power Production, Electric Service Delivery, Strategy, IT and Energy Market Operations.

Dickerson is a senior operations executive and thought leader with over 30 years of energy and utility experience in power production, transmission, distribu­tion, customer care, human resources and energy market/risk operations. He has delivered strong results in business operations, risk assessment, strategy and finance. He brings deep governance expertise as a Board of Directors member for Seedling and RMEL.

Dickerson previously served as President of National Grid - USA Business Services, one of the largest global investor-owned energy companies, identifying more than 20 percent ($22M) in operational cost inefficiencies. Prior to National Grid, he worked for Exelon-Pepco Holdings Inc., an investor-owned company delivering electricity and gas to more than two million customers in Delaware, Maryland, New Jersey and Washington D.C. He served as Senior Vice President, Technical Services; Vice President, Customer Care; Vice President, Performance Management/Support Services; Chief Risk Officer; and Vice President, Strategic Planning.

Dickerson served on the boards of The Treatment Learning Center, City Year and Aclara and as an adjunct professor at the University of the District of Columbia’s School of Public Policy and Business.

Dickerson has been honored as Utility Industry Leader by Intelligent Utility Magazine, Significant Business Leader by Minorities and Women in Business. He has been published in Public Utility Fortnightly, Intelligent Utility Magazine and Texas Renewable Energy Industries Alliance.

Charles holds a Bachelor of Science in mechanical engineering and master’s in applied management from the University of Maryland.

Mark Dombroski

Mark Dombroski

Deputy General Manager and Chief Financial and Risk Officer

Mark Dombroski is responsible for the financial management, risk management and corporate services at Austin Energy.

Dombroski’s experience includes public accounting and Director of Finance for Seattle City Light.

Dombroski holds a bachelor’s degree from The University of Texas at Dallas and a Master of Public Administration from Seattle University.

Kerry Overton

Kerry Overton

Deputy General Manager and Chief Customer and Compliance Officer

Deputy General Manager Kerry Overton joined Austin Energy in 2000 and oversees the utility’s Customer Care Services and Customer Account Management. On Oct. 31, 2016, Overton took the expanded role of Chief Customer and Compliance Officer with responsibilities including Internal Audit, Reliability Compliance and Environmental Services.

Overton provides executive oversight to Austin 3-1-1 and the utility’s customer contact center, which handles 2.84 million customer interactions annually. Prior to his current role, Overton served as vice president of Customer Care and was a senior business process consultant. Customer billing operations generate more than $1.3 billion in revenues for the City of Austin each year. He previously served as deputy land commissioner in the Texas General Land Office, where he oversaw energy resources.

Overton has a Bachelor of Arts in managerial studies and political science from Rice University, a Master of Business Administration from The University of Texas McCombs School of Business, and a Master of Public Affairs from The University of Texas LBJ School of Public Affairs. He also attended the University of Idaho Utility Executive Course.

Erika Bierschbach

Erika Bierschbach

Vice President, Energy Market Operations & Resource Planning

Erika Bierschbach was appointed Vice President of Energy Market Operations and Resource Planning in April 2019.

Bierschbach is responsible for the utility’s physical and financial power portfolio in the ERCOT wholesale electric market, including Austin Energy’s Real Time, Day Ahead and Forward market desks. She oversees the origination of the utility’s renewable power purchase agreements and manages the Qualified Scheduling Entity (QSE) operations for Austin Energy’s owned and contracted resources. Bierschbach is also responsible for resource planning at Austin Energy which includes achieving the climate protection and affordability goals established by the Austin City Council and Austin Energy.

Bierschbach has more than 25 years of experience in energy markets, including positions in energy risk management at Enron Capital and Trade and Duke Energy Trading and Marketing. She joined Austin Energy in 2001 to develop, implement and later manage the utility’s energy hedging program. Bierschbach’s prior positions at Austin Energy include Manager of Energy Supply and Risk Management as well as both Manager and Director of Energy Market Operations. She has established more than 2,250 Megawatts of renewable energy contracts during her tenure at Austin Energy.

Bierschbach holds bachelor’s degrees in Economics and French from Texas A&M University in College Station and is fluent in French and Spanish.

Jerry Galvan

Gerardo (Jerry) Galvan

Vice President, Customer Care Services

Gerardo “Jerry” Galvan started at Austin Energy in July 2016 as the Vice President of Customer Care. Galvan has more than 15 years of experience directing and leading high-volume call centers.

At Austin Energy, Galvan is responsible for the City of Austin’s Utility Contact Center, Austin 3-1-1 — the City’s 24-hour information center — and customer service management, which includes customer escalations and Customer Assistance Programs.

Prior to joining the Austin Energy team, Galvan spent more than eight years at DTE Energy in Detroit, Michigan, four years in San Antonio at an outsource solution provider, and three years at Texas Guaranteed Student Loan Corporation in Round Rock.

Galvan led teams of 100 to 300 customer service representatives that served about 3.8 million electric and natural gas customers. Also during his time at DTE Energy, Galvan was an integral part of the team that created a customer assistance program. This program partnered with charitable organizations to help identify eligible customers and refer them to be set up on an appropriate payment plan.

At Austin Energy, Galvan is excited to work with a talented team to improve customer collaboration through an enhanced customer experience when dealing with the utility.

Galvan has a Bachelor of Arts in Economics from The University of Texas at Austin and speaks both English and Spanish.

Deborah Kimberly

Deborah Kimberly

Vice President, Customer Energy Solutions and Corporate Communications

Deborah Kimberly joined Austin Energy in January 2013. Customer Energy Solutions is responsible for the utility’s energy efficiency and demand response programs, customer solar and renewable subscription offerings, green building program, advanced transportation, market analytics and key accounts, which serves Austin Energy’s largest customers.

Kimberly also manages Corporate Communications for Austin Energy, including Public Information and Marketing Communications. These areas promote the utility’s promise of being customer driven and community focused while bringing visibility to all the services and programs offered to the customers.

Kimberly has worked in the utility industry for more than 30 years and spent more than 22 years at the Salt River Project in Central Arizona. She served as Salt River’s director of customer programs and marketing, where she was responsible for energy efficiency product design and implementation; marketing of all products, price plans, and services; measurement and evaluation; and market research. Previous roles included managing Salt River’s financial services and involvement in public policy and strategic planning initiatives.

Kimberly serves as Chairman of the Board for South-Central Partnership for Energy Efficiency as a Resource (SPEER) and is on the boards of the Pecan Street Inc., the Association of Women in Energy, the Austin Science Education Foundation and is a member of the EPRI Power Delivery Sector Council.

Kimberly earned a Bachelor of Arts in international relations from Stanford University and a Master's degree in international management from the Thunderbird School of Global Management in Arizona.

Deborah Kimberly

Thomas Pierpoint

Vice President, Electric System Engineering and Technical Services

Thomas Pierpoint came to Austin Energy in September 2019 to serve as Vice President of Electric System Engineering and Technical Services. In this role, he is responsible for leading T&D Planning, T&D Engineering, System Operations & Advanced Technology, Emergency Management and ESD Shared Services of Austin Energy to ensure the safe and reliable delivery of electric service and associated information to our customers.

Pierpoint is experienced in nearly all aspects of a utility including T&D engineering, system planning, control centers, emergency management, field operations, customer care, corporate technology, operational technologies, GIS, outage management, mobile dispatch, regulatory, human resources, finance and supply chain. He has more than 30 years of experience in the utility industry, including work at Pepco (which serves the nation’s capital), Delmarva Power & Light, Atlantic City Electric, Baltimore Gas & Electric, Philadelphia Electric, Commonwealth Edison and Exelon.

Before coming to Austin Energy, Pierpoint was a strategic consultant in the energy and utility industry providing support to a number of utility and energy companies as well as the Congressional Budget Office, the Department of Energy and FERC.

Most recently, Pierpoint earned an advanced certificate for executives in management, innovation and technology from the MIT Sloan School of Management. Pierpoint also holds a Master of Business Administration and a master’s in project management, both from Keller Graduate School of Management, in addition to a bachelor’s degree in electrical engineering technology from Old Dominion University.

Pat Sweeney

Pat Sweeney

Vice President, Power Production

Vice President of Power Production Pat Sweeney is responsible for Austin Energy’s nuclear, coal and natural gas power generation as well as On-Site Energy Resources.

Pat joined Austin Energy in 1991 and has extensive knowledge and experience in wholesale energy markets. He previously served as Director of Energy & Market Operations where he led the build-up of Austin’s renewable energy portfolio, resource planning and Austin’s transition to the ERCOT nodal market. 

Pat holds a Bachelor of Business Administration from the University of Texas at Austin and a Master of Business Administration from the University of Houston at Clear Lake.


Elaine Veselka

Elaine Veselka

Vice President, Customer Account Management

Vice President of Customer Account Management Elaine Veselka leads a division encompassing Revenue Measurement (meter reading, maintenance, and current diversion), Billing Services (billing, payments, collections, and branch locations), and Quality Management (quality and training). She coordinates with internal customers such as legal services and accounting work groups, as well as other City of Austin departments like Austin Water, the Watershed Protection Department, and the Austin Transportation Department.

Veselka has more than 20 years of experience in customer account management, including 10 years at regulated and deregulated utilities in senior management positions. Most recently, she was distribution process manager for Electric Service Delivery’s Support Services section. Within that role, she was responsible for supervision of operations for real estate and public involvement, line clearance, GIS and OneCall, infrastructure asset management, quality, and business continuity/emergency coordination. Prior to that she was customer service process manager for Customer Services Management, overseeing key functions such as operations of our credit and collections work group, customer escalation resolution, and the City of Austin Customer Assistance Program.

Veselka joined Austin Energy in 2008. She has a Bachelor of Science from the University of Texas at Austin, and completed her Master of Public Administration at the University of Phoenix.


Greg Flay

Greg Flay

Chief Technology Officer

Greg Flay joined Austin Energy in October 2016 as Chief Technology Officer.
In his role as Chief Technology Officer, Greg oversees corporate strategic planning, technology roadmap management, enterprise architecture, technology selection and research and development functions — including oversight of Austin Energy’s relationship with the Electric Power Research Institute. His focus is on transparency, operations and the speed and strategic alignment of technology acquisition.

Greg has more than 20 years of leadership and management experience in the power industry and related fields. His diverse leadership roles include information technology; mergers and acquisitions; business operations; business analysis; strategy; technology process controls; program and project management; technology portfolio management; and enterprise architecture. Greg has a large amount of experience in the wholesale power generation and competitive retail segments of the power industry. He also has experience in residential solar and home services markets, including smart home, HVAC, electrical and plumbing services.
Greg holds Bachelor of Arts and Master of Science degrees in geography from Penn State University as well as a Ph.D. in geography from the University of Minnesota with a focus on spatial analytics.

Mercedes Sanchez

Mercedes Sanchez

Chief Information Officer

Mercedes Sanchez took the role of Chief Information Officer in 2015 after successfully serving in the interim role for nearly two years. She has more than 23 years of service with the City of Austin, with 21 years at Austin Energy. She previously served as the Director of Corporate Quality Services for more than 10 years.

In her current role, she directs a team of more than 200 staff in day-to-day information technology operations for the utility, including service management, infrastructure, IT PMO, enterprise applications, compliance, and business and quality management.

Sanchez led various initiatives throughout her tenure with Austin Energy. She established the Corporate Project Management Office and led the development of standardized project management methodologies, governance, portfolio management and project reporting. She also successfully directed efforts to become the first utility in the nation to register its Electric Service Delivery, Customer Care, and Power Supply and Market Operations business units to the ISO 9001:2008 Quality Management System Standard.

Sanchez earned a Bachelor of Business Administration from the University of Texas at San Antonio. She holds a number of professional certifications, including Project Management Professional, ISO 9000:2000 Series IRCA Lead Internal Auditor and Six Sigma Green Belt. She is a graduate of the Utility Executive Course from the University of Idaho.

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Date last reviewed or modified: 9/30/19

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