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Summit Public Schools Board

Learn more about our California Board of Directors below.

Mr. Robert J. Oster
Chairman of the Board
A private venture investor since 1987, Mr. Oster has worked with both institutional and other private investors in all phases of venture investing. Prior to venture investing, he worked as a professional economist and in several high-level finance positions, the last being Vice President of Finance and Administration for Oracle Corporation, where he spearheaded Oracle’s initial public offering. In addition to chairing the SPS Board, Mr. Oster is Chairman of the Nominating Committee of the Board of Overseers of the Hoover Institution of Stanford University and Chairman of Spirit of America. He received his BA in economics with honors from Occidental College and an MA and PhD in economics from the University of California at Berkeley.
Mr. Diego Arambula
Arambula was a member of Summit’s faculty for over a decade, before shifting his focus towards creating transformative change in his hometown of Fresno, CA. He joined Summit Preparatory Charter High School as a social science teacher at the beginning of its third year of operation and taught for six years. After stepping out of the classroom, Arambula helped launch Summit’s first high school that integrated a blended learning model, Summit Public School Rainier, in East San Jose. After a year as the founding Executive Director of Rainier, he moved into the role of Chief Growth & Innovation Officer, helping to expand Summit schools and infuse innovation throughout the organization. Prior to coming to Summit Public Schools, Arambula served as Communications Director for Congressman Cal Dooley, after serving as Deputy Campaign Manager. He holds a BA in government, with honors from Harvard University and a MA in education from Stanford University.
Mr. Steven Humphreys
Mr. Steven Humphreys has been a member of Summit’s Board since its founding, and was one of the original contributors to our initial charter. He was instrumental in recruiting Ms Tavenner and others into Summit from its early days, and has served on the Summit Board for 18 years. In addition to serving on the board of Summit Public Schools, Steve has served as a trustee of the Portola Valley School District and on numerous other boards. Steve is currently CEO of a publicly-traded security company, Identiv, Inc, which protects places including the White House, all of our federal courthouses, airports, schools and other security-sensitive places. He’s started and run several other technology companies, and began his career at General Electric Company where he worked in a variety of manufacturing and information technology positions. Steve received a BS from Yale University and an Masters in Science and Masters in Business Administration from Stanford University.
Dr. Anisha Munshi
Dr. Anisha Munshi is the current Assistant Superintendent of Professional Learning for the Santa Clara County Office of Education. She has a long history of working in education as a teacher, assistant principal, principal and board trustee. Dr. Munshi holds a Bachelor of Arts from the University of Kashmir, India in Math and Economics and Bachelor of Science from National University in Liberal Studies, a Master of Arts from National University in Education and Multiple Subject Teaching Credential and a Doctorate from San Jose State University in Educational Leadership. Dr. Munshi was appointed to the Summit Board of Directors by the Santa Clara County Office of Education in 2020.
Mr. Andy Thompson
Mr. Thompson is President, Chief Executive Officer and co-founder of Proteus Digital Health. He is a veteran of Silicon Valley biomedical startups, formerly serving as President, Chief Executive Officer and co-founder of FemRx and Chief Financial Officer of CardioRhythm. As a consultant and venture capital investor he contributed to several successful healthcare companies including Cell Genesys, Cytotherapeutics, Northstar Neuroscience and QRx Pharmaceuticals. He holds an MA in engineering from Cambridge University and was a United Kingdom National Engineering Scholar from 1982 to 1985. He also holds an MA in education and an MBA from Stanford University. Mr. Thompson was a founding board member and Foundation President of Summit Preparatory Charter High School.
Mr. Blake Warner
Mr. Warner is a Founder and Managing Partner of Silicon Valley Partners LLC, a firm that provides strategic merger and acquisition advisory services focused on the growth sectors of the digital economy. Prior to this, he spent 10 years at Thomas Weisel Partners LLC, where he provided investment banking services for the software, media, and communications sectors. In addition to serving on the SPS Board, he is currently the Chairman of the Governance Council of Everest Public High School, providing oversight as well as helping set strategic goals and operational objectives. Mr. Warner received his BA from the University of California, Santa Barbara, and his MBA from the University of Southern California.

If you would like to contact our California Board of Directors, you can reach them at CABoardofDirectors@summitps.org.


Washington Board of Directors

Learn more about our Washington Board of Directors below.

Mr. Evan Smith
Evan Smith brings experience from both the public and private sectors, having worked both in education as well as across a broad set of private sectors, primarily developing strategy for both large and small companies. Currently a Director of Global Corporate Strategy at Starbucks, Evan joined Starbucks after three years with the Washington, D.C. office of McKinsey and Company and a few years working for e-commerce startups in San Francisco and New York City, respectively. Prior to this private sector work, Evan was the Director of School Operations for the Washington, DC Public Schools, managing many day-to-day, school-level operations functions across the district’s 123 schools. Evan started his career as a high school social studies teacher in the New Orleans Public Schools. He holds a BA from the University of Pennsylvania, a MA in history from the University of Cambridge (UK), and an MBA from the Darden School of Business at the University of Virginia.
Mr. Stefan Weitz
Stefan Weitz has an extensive background in technology and business. Mr. Weitz joined Microsoft in 2002, leading diverse projects across strategy, education partnerships, and engineering. He has served on advisory boards for many startups, ranging from biometrics to advertising to virtualization. Mr. Weitz is currently the CPO of Radial and holds an MA in political science and physics from Gonzaga University. He lives in Seattle.
Ms. Shirline Wilson
Shirline Wilson brings a focus on leadership development to our board. Ms. Wilson has spent 20 years working in Finance, IT and Business Excellence through leadership roles at The Cobalt Group, Microsoft and Cypress Consulting. Shirline’s accomplishments include leading major program and organizational change efforts, improving processes and systems, managing risk, and developing team capacity. Ms. Wilson is an alum of Antioch University. She is serving as the Interim State Director for Democrats for Education Reform WA and is parent of three great kids including one who attends Rainier Prep, a charter middle school. She lives in Seattle.
Ms. Mafara Hobson
Mafara Hobson is a dynamic storyteller and executive communications strategist with more than a decade of experience in mission-driven, strategic communications and media relations. She has demonstrated expertise in creating and disseminating transformative narratives that have advanced key objectives in government, corporate and nonprofit sectors.

Mafara is the current Director of Communications at the Swedish Medical Center where she directs strategy, plans, executes internal communications and public affairs across five hospitals and seven campuses in the Seattle area. Mafara joined the Swedish Medical Center after more than two years as the Executive Communications Director at the City of Seattle. Mafara came to Seattle after serving an appointment in the Office of General Services in the Obama Administration.

Mafara has deep roots in public education advocacy and was a pivotal member of Washington DC Mayor Adrian Fenty’s team at a time of significant transformation within the DC public school district. Later Mafara joined forces with StudentsFirst a national non-profit organization in support of education reform based in Sacramento. As the Marketing and Communications Chief, she drove digital and social media strategies in creating a grassroot movement to attract and engage more than one million parents, students and public school advocates across the country to join forces with the movement. Mafara holds a Bachelor of Arts in Journalism from Howard University.

If you would like to contact our Washington Board of Directors, you can reach them at WABoardofDirectors@summitps.org.


Board Meetings

See meeting dates, agendas, and minutes of all Board Meetings


Contact Us

CA Board Members: CABoardofDirectors@summitps.org

WA Board Members: WABoardofDirectors@summitps.org

Please note, communications to and from members of the Summit Public Schools Boards of Directors are subject to open public meetings laws in both California and Washington. Board members receive all written correspondence, however members may not respond directly to your message because Board members communications concerning the matters of Summit Public Schools outside of the public meeting are restricted pursuant to CA Govt. Code 54950 et. seq. and RCW 42.30. The Board welcomes public comment during our meetings and may direct staff to include matters raised in written correspondence in an agendized portion of a future meeting or may direct staff to respond to the written correspondence.