SSM - Key Persons


Abby Gillfillan

Job Titles:
  • Member of the Board
Betsy has been reducing her global impact since moving to San Marcos in 1976. Married to Todd Derkacz and the mother of Emily and Kyle, she owned a local building design company, Shelter Design, for 25 years and has served on City Council, P & Z Commission, and numerous local boards. Betsy is a founding member of Sustainable San Marcos a

Alex Vogt - President

Job Titles:
  • President
Alex is from Coupland, TX but has been swimming in the San Marcos since he learned how. A resident for over 10 years, he is now an avid cyclist and kayaker. He wants to use his education in Urban planning

Amy Kirwin - Treasurer

Job Titles:
  • Treasurer

Betsy Robertson

Job Titles:
  • SMNG Chair
nd today serves as the San Marcos Neighborhood Gardens Chair.

Gabrielle Moore

Job Titles:
  • Secretary
A REALTORĀ® who promotes sustainable and affordable housing and equitable, active transportation, Gabrielle was raised in a family that believes in giving back to the community. She serves as a commissioner on Planning and Zoning for the City of San Marcos and advocates for voting rights, the environment, and animal welfare issues. Amy has lived in San Marcos for almost 30 years, dedicating her time to improving the neighborhoods and environment through volunteering. Currently, she works for the City of San Marcos as the Community Enhancement Initiatives Manager, managing the Resource Recovery division which includes Community Enhancement and Keep San Marcos Beauti

Sarah Simpson - VP

Job Titles:
  • Vice President
  • Vice President MoveSM Chair
Alex is from Coupland, TX but has been swimming in the San Marcos since he learned how. A resident for over 10 years, he is now an avid cyclist and kayaker. He wants to use his education in Urban planning The daughter of a wildlife biologist and hardware store manager, Sarah grew up in San Marcos surrounded by consideration for both conservation and improvement of the built world. Today she puts these influences into her practice as an architect, urban designer, and advocate for sustainable and equitable urbanism. Sarah's master thesis stu