General Counsel

General Counsel Joe Cole provides legal counsel, opinions, and legal services related to GBRA’s responsibilities and operations, serving as an advisor to the Board of Directors and the General Management team. Cole also manages litigation and outside counsel activities while overseeing the development and review of policies, contracts and other corporate and legal agreements Cole…

Emanuel Valdez

Director

Comal County Appointed: 2021 Term Expiration: 2023 Emanuel Valdez, of New Braunfels, is a Software Consulting Manager with BMC Software, INC. and an active volunteer with the Vintage Oaks Veterans Organization. Valdez honorably retired from the United States Army Reserves after thirty years of service as a Command Sergeant Major. He holds a certification in…

Andra Wisian

Director

Kendall County Appointed: 2021 Term Expiration: 2027 Andra Wisian, a resident of Boerne, is a self-employed creative media consultant. She is a member of the Texas and Southwestern Cattle Raisers Association, National Cutting Horse Association, Red Angus Association of America, Texas Farm Bureau and Boerne/Kendall County Economic Development Corporation. She currently serves as volunteer president…

Sheila L. Old

Director

Guadalupe County Appointed: 2021 Term Expiration: 2027 Sheila L. Old, a resident of Seguin, is president of The Old Law Firm, where she also serves as a practicing attorney. She is vice president of the Guadalupe County Bar Association and is a member of the State Bar of Texas, Texas Association of Family Defense Attorneys…

Randy Staats

Executive Manager of Finance/CFO

Executive Manager of Finance/CFO Randy Staats is responsible for the overall management of the finance department, leading all accounting and finance efforts including budget and financial plans, payroll, accounts payable & receivable, treasury & investments, risk management, purchasing, grant writing, records management, capital assessments, debt administration & planning, and financial reserves. He is also responsible…

Nathan Pence

Executive Manager of Environmental Science

Executive Manager of Environmental Science Nathan Pence leads the Guadalupe-Blanco River Authority’s environmental stewardship initiatives while overseeing strategic planning and day-to-day operations for the Canyon Lake Gorge and Water Quality Lab. Pence leads the administration of the Clean Rivers Program for the Guadalupe River and Lavaca-Guadalupe Coastal basins, in partnership with the Texas Commission on…

Vanessa Z. Guerrero

Executive Manager of Administration

Executive Manager of Administration Vanessa Guerrero oversees a diverse array of internal and external services, including human resources, communications, education, safety, strategic planning, community affairs, customer service, government relations and information technology. Guerrero directs the development of long-range strategic plans and initiatives, while overseeing training and recruitment, educational outreach, internal and external communications efforts and…

Charles M. Hickman, P.E.

Executive Manager of Engineering

Executive Manager of Engineering Charles “Charlie” Hickman directs the design and construction of capital improvement projects, oversees water resource planning and provides operational assistance on technical procedures and issues related to existing Guadalupe-Blanco River Authority facilities and structures. Hickman also leads the monitoring of flow conditions throughout the Guadalupe River Basin, interpretation of hydrologic events…

David Harris

Executive Manager of Operations

Executive Manager of Operations David Harris serves as the Chief Operations Officer for the Guadalupe-Blanco River Authority, overseeing 10 water systems, 14 wastewater treatment operations, five pipelines, five hydroelectric plants, three parks and one diversion system. Harris is responsible for ensuring the provision of technical assistance for GBRA’s water and wastewater facilities and assists in…

Thomas Hill, P.E.

Senior Advisor to the General Manager

Senior Advisory to the General Manager, Thomas “Tommy” Hill assists the Executive Management Team with the development and implementation of projects, programs, operational activities and strategic initiatives. Hill focuses on engineering project development and implementation, reviewing contracts and procurement procedures. A registered professional engineer, Hill celebrated 45 years at GBRA in 2021. He has held…

Jonathan Stinson

Deputy General Manager

Deputy General Manager Jonathan Stinson directs the development and implementation of programs and policies, ensuring compliance with the Guadalupe-Blanco River Authority’s governance, management, operational structure, and statutory regulations. Stinson represents GBRA in public affairs while assisting with the management of daily administrative and operational activities. Stinson represents GBRA as a member of the South Central…

Darrell Nichols

Sr. Deputy General Manager

Senior Deputy General Manager Darrell Nichols oversees policy development and implementation as well as daily operational and administrative activities for the Guadalupe-Blanco River Authority and its 29 operating divisions. Nichols has directed more than $300 million in capital improvement projects since 2017, managing project development, project financing, construction activities, scientific data collection and dissemination, hydrologic…