Executive Management Team

In addition to the General Manager / CEO, the following staff members comprise GBRA's Executive Management Team.

Darrell Nichols

Darrell Nichols
Sr. Deputy General Manager

The Senior Deputy General Manager is charged with the development and implementation of the Authority's policies, and has general oversight of daily operational and administrative activities. The Senior Deputy General Manager assists with directing GBRA's programs related to project development and construction activities, financing of water infrastructure projects, scientific data collection and dissemination, hydrologic and environmental analysis, water supply planning, and water policy development.

Nichols has been working in the utility industry for 25 years. Prior to joining GBRA, his roles at the Texas Water Development Board (TWDB) included assistant executive administrator and director of Regional Water Planning and Development. In addition to consulting, he also previously performed utility regulatory work at the Texas Commission on Environmental Quality (TCEQ).

Nichols earned his bachelor's degree in civil engineering from the University of Texas at Austin.

Phone: 830-379-5822 Ext. 314
Fax: 830-379-1766
Email:

Jonathan Stinson

Jonathan Stinson
Deputy General Manager

The Deputy General Manager is responsible for the implementation of the GBRA's programs and policies in an efficient and effective manner in conformance with the authority's governance, management, operational structure, and statutory requirements. Stinson also is charged with general oversight, development, and implementation of GBRA's policies, and assists with the daily administrative and operational activities.

Stinson, formerly an assistant executive administrator at TWDB focused on policy considerations related to water infrastructure development and financing, program development and agency administration. Prior to joining TWDB, he served as a natural resources policy advisor to the governor in the Office of Budget, Planning and Policy, where he focused on programs and policies affecting water, parks and wildlife, and agriculture. He also worked in the Texas Senate for nearly 10 years, during five legislative sessions, working on issues ranging from groundwater and surface water policies, infrastructure financing, and economic development issues.

Stinson earned his bachelor's degree from Texas A&M University.

Phone: 830-379-5822 Ext. 507
Fax: 830-379-1766
Email:

Alvin Schuerg

Alvin Schuerg
Senior Advisor to the General Manager

The Senior Advisor to the General Manager provides advice and guidance to the general manager and executive staff on GBRA's programs, operational activities and strategic planning. He reviews GBRA's operational contracts and procurement procedures, and focuses on project implementation and customer development.

Schuerg, a certified public accountant, has more than 35 years of service at GBRA and previously served as Executive Manager for Financial Administration, overseeing the accounting and finance functions at GBRA, preparation of its annual budget and financial plans, financial reserves, and debt service investments, capital assets, procurement and risk management prior to being elevated to Senior Advisor in 2016.

Schuerg earned his bachelor's degree from Texas Lutheran University.

Phone: 830-379-5822 Ext. 233
Fax: 830-379-9718
Email:

Darel Ball

Darel Ball
Executive Manager of Operations

The Executive Manager of Operations serves as the chief operations officer and directs water resource management, recreation and parks, and utilities operations in all 10 counties of GBRA's statutory district. Ball assists in the negotiation and development of major contracts and represents GBRA with its customers. Through oversight of a Deputy Executive Manager of Operations, he also is responsible for ensuring the provision of technical assistance to GBRA's water and wastewater treatment facilities, and advises and consults with personnel of other such facilities within GBRA's statutory district that are operated by other entities (municipalities, MUD's, private contractors, etc') and has oversight of GBRA's Laboratory.

Ball earned a bachelor's degree from Texas A&M University and a master of business administration from the University of Houston-Victoria.

Phone: 830-379-5822 Ext. 246
Fax: 830-401-0991
Email:

Thomas Hill

Thomas Hill, P.E.
Executive Manager of Project Engineering and Development / Chief Engineer

The Executive Manager of Project Engineering and Development / Chief Engineer provides general supervision of GBRA's consulting engineers for water resource projects and provides operational assistance on technical procedures and problems related to GBRA's structures, equipment and facilities. Hill also oversees the monitoring flow conditions within the river basin, interpretation of hydrologic events and data, and development of independent engineering design analyses. He evaluates and expands strategic business alliances for GBRA, oversees activities for new services and projects, property acquisition, and acquisition of state and federal permits. His staff serves as principal contacts for chamber relations, new customers, and economic development partners.

Hill, who is a registered professional engineer, earned his bachelor of science degree in civil engineering from Texas A&M University and continued his graduate studies at the University of Texas at San Antonio.

Phone: 830-379-5822 Ext. 245
Fax: 830-379-9718
Email:

Randy Staats

Randy Staats
Executive Manager of Finance/CFO

The Executive Manager of Finance/CFO is responsible for the overall management of GBRA's Finance Department and leads all accounting and finance efforts, including budget and financial plans, payroll, capital assessments, debt services and financial reserves as well as the preparation of the annual financial report.

Staats is a certified public accountant and certified internal auditor with decades of experience as a financial leader. Prior to GBRA, he worked for Round Rock ISD for 20 years and was previously employed in the banking industry.

He has a degree in finance from Texas A&I University and a master's degree in accounting from Southwest Texas State University.

Phone: 830-379-5822 Ext. 482
Fax: 830-379-5163
Email:

Vanessa Guerrero

Vanessa Z. Guerrero
Executive Manager of Administration

The Executive Manager of Administration oversees the Human Resources, Communication, Education, and IT Departments. Guerrero is responsible for strategic planning, recruitment, training development, direction and overall management of the human resources functions while steering GBRA's educational outreach, strategic communications and technical infrastructure.

Prior to joining GBRA, Guerrero served as a human resources leader to San Antonio non-profit organizations including Haven for Hope and The Boys and Girls Club of San Antonio. Her expertise encompasses over 10 years of experience.

Guerrero earned her bachelor's degree in human resources from The University of the Incarnate Word.

Phone: 830-379-5822 Ext. 234
Fax: 830-379-9718
Email:

Tom Bohl

George "Tom" Bohl, J.D.
General Counsel

The General Counsel is responsible for advising the GBRA Board of Directors and GBRA management and staff on a wide range of corporate and regulatory legal matters. He prepares legal opinions, briefs, reviews contracts, and assists in resolving disputes. He also serves as liaison between GBRA and any contracted or retainer counsel with which the organization engages. Bohl worked for more than 20 years with the Office of the Attorney General of Texas. Prior to his work with the AG's Office, he worked in attorney positions for predecessor agencies of the Texas Commission on Environmental Quality. Bohl earned and his bachelor's degree in history from the University of Texas and his law degree from Baylor University School of Law.

Phone: 830-379-5822 Ext. 276
Fax: 830-379-9718
Email:

Nathan Pence

Nathan Pence
Executive Manager of Environmental Science and Community Affairs

The Executive Manager of Environmental Science and Community Affairs is responsible for the management of GBRA's environmental stewardship programs and community relations.

Pence has more than 15 years in watershed management and planning with an accomplished record of collaborating with local officials and stakeholders. Prior to GBRA, Pence served as the Threatened and Endangered Species Executive Director for the Edwards Aquifer Authority (EAA) in San Antonio, where he facilitated and managed the Edwards Aquifer Habitat Conservation Plan (EAHCP). Additionally, he's worked for the City of New Braunfels collaborating with local tourism officials and environmentalists to improve economic development opportunities, while protecting the integrity of the natural resources.

Pence earned his bachelor's and master's degrees in Aquatic Biology from Texas State University.

Phone: 830-379-5822 Ext. 239
Fax: 830-379-9718
Email:

© 1998 Guadalupe-Blanco River Authority