City of New Braunfels

About Us

​The Central Texas Stormwater Coalition (CTSC) is comprised of MS4 program managers from the Central Texas cities of San Marcos, and New Braunfels, as well as Texas State University.

This collaborative group was formed with the intent to combine efforts, share experiences, and provide support in an effort to improve each entity's MS4 program and meet program goals for compliance with state and federal regulations.

City of New Braunfels

Mark Enders currently serves as the Watershed Program Manager for the City of New Braunfels. In this role he oversees the City’s MS4 Stormwater Management Program, Edwards Aquifer Habitat Conservation Plan and Dry Comal Creek/ Comal River Watershed Protection Plan implementation efforts. Mark has approximately 15 years of experience working to protect surface water quality in both the public and private sectors. When Mark is not working he enjoys kayaking the rivers of Central Texas, playing guitar, and introducing his daughter to our local rivers.


Phillip Quast is the Watershed Coordinator for the City of New Braunfels and has held this position since 2018. His academic background includes a Master of Applied Geography degree from Texas State University with a focus on Environmental Resource Management and Geographic Information Systems and a Bachelor of Science degree in Computer Science, also from Texas State University. Phillip has worked in the field of land conservation and habitat restoration for 13 years and enjoys working to develop and implement programs that are designed to improve the habitats for wildlife to thrive in.

City of San Marcos

Alex O'Connor is the Stormwater Coordinator for the City of San Marcos where she ensures compliance with the TCEQ issued Phase II Small MS4 permit.  Alex went to Texas State University where she earned a Bachelors in Science with a major in Resource and Environmental Studies and a minor in French. Alex is a Certified Inspector of Sediment and Erosion Control (CISEC #2145) with over 12 years of experience in environmental compliance focusing on TPDES permitting, writing and managing SWP3’s and SPCC programs, performing Phase I and II ESA’s and Geologic Assessments.

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Peyton Austin is the Stormwater Technician for the City of San Marcos, where he helps to implement MS4 compliance operations for the Stormwater Management Department. Peyton has maintenance experience as an equipment operator for the City of San Marcos, and design experience as an intern for Gallup Engineering. Peyton graduated Summa Cum Laude from Texas State University with a degree in Water Resources, and in July of 2020 he became a Certified Inspector of Sediment and Erosion Control (CISEC #2973).

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Adam Rossing is the Stormwater Systems Manager for the City of San Marcos.  Adam previously worked for Lakota Water Company where he installed rainwater harvesting systems for potable use across Texas.  Adam is a Certified Inspector of Sediment and Erosion Control, a TCEQ licensed Wastewater Operator, and holds multiple American Rainwater Catchment System Association certifications.  Adam has worked in the water/stormwater construction industry for 18 years. Adam was raised in the Austin area and currently lives in Canyon Lake with his wife and two sons. 

Texas State University


Nicky Vermeersch is an environmental health and safety specialist at Texas State University, where she focuses on education and outreach for the MS4 stormwater program. Nicky attended Stephen F. Austin State University where she received her bachelor’s in environmental science and Vrije Universiteit where she received a master’s in environment and resource management with a concentration in ecosystem services and biodiversity. Nicky is relatively new to the field of environmental consulting but is excited begin her journey. In her spare time outside of work, Nicky enjoys hiking, camping, and reading.