Executive Leadership

Roland Ruiz

As general manager of the Edwards Aquifer Authority (EAA), Roland Ruiz, oversees the daily operations of a special purpose regional groundwater agency tasked with managing and protecting the Edwards Aquifer.  One of the most prolific artesian aquifers, the Edwards is also well noted as the primary water source for more than 2 million people in south central Texas and for providing flows to two of largest natural spring systems in the Southwest – the Comal and San Marcos springs.

In his role as general manager, Ruiz reports to a 17-member board of directors and leads a dynamic organization of engaged, service-minded professionals whose core mission is to manage, enhance and protect this natural resource for the benefit of a diverse and growing region of Texas. Since assuming this leadership role in October 2012, Ruiz has focused on building “shared value” around the effective management of the Edwards Aquifer in the face of environmental, economic, and regulatory demands that are often exacerbated by drought and competing interests in the aquifer. His efforts include reshaping the regulatory culture of the EAA through the development and implementation of institutional core values of stewardship, science, professionalism, respect, collaboration, and integrity to foster greater responsiveness, transparency and accountability in the agency.  

Brock Curry

Brock Curry joined the Edwards Aquifer Authority in October 1996, and was promoted to Deputy General Manager in 2012.  Working closely with the General Manager, Brock oversees all aspects of EAA operations.  Brock also serves as a liaison to the EAA Board of Directors to ensure staff is appropriately implementing the organization’s policies.

Prior to joining the EAA, Brock was the General Fund Budget Manager for the City of Austin, Texas for over five years.  Brock holds a Bachelor of Arts degree from Southwestern University and a Master of Public Affairs degree from the University of Texas-LBJ School of Public Affairs. 

Marc Friberg

Marc Friberg is the Executive Director of External & Regulatory Affairs for the Edwards Aquifer Authority.  In his role, Marc manages the EAA’s conservation programs while providing support to the EAA’s permitting and aquifer management programs.  He also aids the EAA in its rule making and legislative activities.  

Prior to joining the Authority, he worked for the Texas Commission on Environmental Quality in the Office of Legal Services.  Marc is a graduate of Baylor University and the Baylor University School of Law. 

Nathan Pence

Nathan Pence is the Executive Director of the Habitat Conservation Plan (HCP) for the Edwards Aquifer Authority.  The HCP is a management plan implemented by multiple stakeholder groups to provide for stewardship of regional resources and management of the Edwards Aquifer.  In his role, Nathan works with stakeholders to ensure continued participation and consensus in planning, while from an administrative role, the implementing of required mitigation and spring flow protection measures.

Prior to working with EAA, Nathan worked for the City of New Braunfels.  Nathan has a Bachelor’s and Master’s degree in Aquatic Biology from Texas State University.

Felix Marquez

Felix Marquez is the Executive Director of Administration and Financial Services.  In this role, he directs the operations of the finance, human resources, IT and facilities departments.  Felix joined the EAA in 2006 as the Human Resources Officer and then became the Administration Officer.

Prior to the EAA, he worked for Angelo State University and the City of Plano.  Felix holds a Bachelor’s degree in Political Science and a Master’s degree in Public Administration from St. Mary’s University.

Mark Hamilton

Mark Hamilton joined the Edwards Aquifer Authority in 2002, and was promoted to Executive Director of Aquifer Management Services in 2014.  In his role, Mark directs the EAA’s aquifer science and aquifer protection programs while providing support to the EAA’s permitting and outreach programs.  He also aids the EAHCP with its mitigation and spring flow protection requirements.  

Prior to joining the EAA, he was a Project Manager and Geology Group Leader for Earth Tech.  Mark is a graduate of the University of Texas San Antonio and is a registered Professional Geoscientist. 


Elizabeth Woody

Elizabeth Woody has been with the Edwards Aquifer Authority's public outreach and education department since 2007. She was promoted to Executive Director of Communications & Development in 2017.  In this role, Elizabeth directs the EAA’s internal and external communications and education programs, provides support for the Edwards Aquifer Conservancy (the EAA's nonprofit, supporting organization) and works collaboratively with the executive team to promote the mission and programs of the EAA .  

Prior to joining the EAA, she was Director of Marketing & Community Relations for a Montessori school and a Marketing Manager for small business enterprises.  Elizabeth is a graduate of New York University.