Central Team

Using best practices & steering committee guidance, the Central Team provides coalition stewardship & support to:

  • facilitate shared purpose & vision
  • maintain website for shared data
  • prepare & facilitate forums
  • communicate news & action alerts
  • measure progress & impact

Doug Silverstein, Central Team Leader (leadership, website, programs) - As a 25-year Burlingame resident following 25 years in SF, Doug has enjoyed the Bay Area’s mountains and coasts as well as its educational and economic opportunities. He maintains a 25-year record of success in technology sales and marketing as the principal of Cypress Consulting and in leadership roles with Cisco, Nuance, and Symantec. Doug has a BA in Economics from UC Berkeley and an MBA from Northwestern University. Prior to Silicon Valley, Doug spent 5 years in investment analysis. Since 2015, Doug has intensified volunteer work with environmental organizations including Citizens’ Climate Lobby, Citizens Environmental Council of Burlingame, Peninsula Clean Energy, and Sustainable San Mateo County. He enjoys hiking, travel, music, and cherished family time.

Petra Silton, Forums Manager (forums) - Petra has been involved in local nonprofit work for over 20 years and in leadership positions at schools, including spearheading environmental education and action programs at North Shoreview Montessori as the PTA President which achieved the first San Mateo County green certified school and a Sustainable San Mateo County Sustainability Award. At Peninsula Bridge, Petra led innovative initiatives such as the School Choice Program. At D.C. Central Kitchen she created revenue-generating  food rescue job training program that employed formerly homeless individuals. Additionally, she has raised millions of dollars to benefit local low income students. She holds a BA in International Relations from the University of Pennsylvania.

coming soon, Communications Volunteer/Intern (communications) - 

coming soon, Forums Volunteer/Intern (xx) - 

coming soon, Programs Volunteer/Intern (xx) - 

Steering Committee

A multi-stakeholder committee that meets quarterly with and to guide the GCSM Central Team.


Georgia Antonopoulos, Executive Director, Thrive Alliance - Georgia has an extensive background leading nonprofit organizations, combined with providing leadership training to the nonprofit sector. She served most recently as the CEO of the Boys & Girls Club of the Coastside, was previously Director of Education and Training and Senior Consultant for the Center for Volunteer & Nonprofit Leadership in San Rafael, and Director of the Center for Nonprofit Management at Stonehill College in Easton, Massachusetts.


UNCONFIRMED -- Matt Biggar Ph.D., Founder and Principal, Connected to Place - 25 years of professional experience as an organizational leader, educator, researcher and consultant. He earned his Ph.D. from Stanford University’s Graduate School of Education in 2015 where his research involved behavioral science, sustainable transportation and collective impact. In 2016, Matt founded Connected to Place.




UNCONFIRMED -- Andra Yeghoian, Environmental Literacy Leader, SMC Office of Education - Representing the Education organizations Andra is a seasoned educator with over a decade of private and public school experience in administration, classroom teaching, curriculum and instruction design, facilitation, professional development, and project management. She has a BA in International Relations and a Teaching Credential from UC Davis, and an MBA in Sustainable Systems from the Bainbridge Graduate Institute. Andra currently serves as the Director of Sustainability at a San Francisco Bay Area High School. Her passions center around personal and organizational learning, and facilitating the journey for others in becoming self-aware, creative, change agents.






Advisors provide additional ad hoc support to the Central Team.

Diane Bailey, Executive Director, Menlo Spark - Diane is a climate and clean air advocate with a background in environmental science. She comes from the Natural Resources Defense Council, where she spent almost 14 years working at the local, state, federal and international level promoting improved air quality and public health through reduced fossil fuel use, advances in clean transportation, and pollution prevention in industry. Previously, Diane worked at Citizens for a Better Environment in Chicago and a local transportation planning agency in Houston. She holds a bachelor’s degree in chemical engineering from Washington University and a master’s degree in environmental engineering from Rice University.

UNCONFIRMED -- Kellyx Nelson, Executive Director, San Mateo Resource Conservation District - Kellyx Nelson is passionate about public service and building strong alliances to tackle thorny challenges. She has spent nearly 30 years in non-profits, government, and the private sector developing, implementing, and assessing programs and partnerships for environmental benefit and other public good. She has served as the Executive Director of the Resource Conservation District since 2006. Her diverse career has included 14 years as an environmental educator for underserved communities in New York and San Francisco, driving a Freightliner cross-country as a long-haul trucker, delivering packages as a motorcycle messenger, and managing conservation projects for a local land trust. She has an undergraduate degree from Columbia University in Political Science and Environmental Science and a Master’s Degree in Public Policy from UC Berkeley. Under her direction the RCD has achieved distinction, receiving the 2017 Silicon Valley Water Conservation Award, 2016 Sustainability Award from Sustainable San Mateo County, 2012 District of the Year from the California Association of RCDs and more. In 2015, Kellyx was inducted into the San Mateo County Women’s Hall of Fame in recognition of her contributions to the overall well-being of the County.



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