Together we can do so much.

  • Randy Tsuda, AICP
    Randy Tsuda, AICP
    President and CEO

    Randy joined Alta Housing in 2018 after serving as the Mountain View Community Development Director for over 10 years. His career includes experience in the non-profit, private, and public sectors, and spans real estate, city planning, affordable housing, and economic development. He has worked on projects that received awards from the American Planning Association, American Society of Landscape Architects, and in May 2018 received the “Bringing It Home” award from SV@Home, a policy and advocacy organization focused on increasing affordable housing. Randy was also a lecturer for seven years in the Urban and Regional Planning Program at San Jose State University.

    BS, City and Regional Planning, California Polytechnic State University, San Luis Obispo

  • Sheryl Klein
    Sheryl Klein
    Chief Operating Officer

    Sheryl Klein joined Alta Housing as its first COO after a five year tenure on the Board of Directors. During her time as Board Chair, she led Alta Housing’s latest affordable housing project, Wilton Court project through entitlements, development and funding. Sheryl joined the Alta staff in April 2020.
    She is responsible for strategic initiatives and planning. She has 12 years experience in real estate investing and property management. She holds an MBA in Finance from Santa Clara University and a BA in Economics from Barnard College. She is also a licensed Real Estate Broker (CA #01844288).

  • Carlos Castellanos
    Carlos Castellanos
    VP, Real Estate Development

    Carlos Castellanos joined Alta Housing in 2020.  Previously, he led development in the East Bay for Mid-Pen.  Carlos has a record of 25 years in real estate development and affordable housing. He enjoys working with the diverse populations of the Bay Area to build healthy, vibrant and safe neighborhoods and making stable, affordable housing the cornerstone to achieving his vision. Carlos has a Master’s of City Planning and Master’s of Science in Transportation Engineering from the University of California, Berkeley and has been appointed to serve as a regional policy advisor to the Metropolitan Transportation Commission, the Bay Area region’s council of governments.

  • Georgina Mascarenhas
    Georgina Mascarenhas
    VP, Property Management

    Georgina manages over 700 units—and growing! She joined Alta Housing in 2006 as Director of Property Management, and has since been named VP, Property Management. She brings over 20 years of progressive experience in multi-family property management with expertise in landlord/tenant law, fair housing, and issues related to affordable and subsidized housing.

    BA, Psychology, Saint Lawrence’s College, Karachi

  • Quinsia Ma
    Quinsia Ma
    Chief Financial Officer

    An accountant with over 20 years of progressive experience, Quinsia Ma joined Alta Housing in 1999. She is committed to ensuring the financial integrity of the company and its affiliates, and serving the fiscal needs of The Housing Development, and Property Management Divisions. She monitors financial policies and procedures, internal controls and reporting systems, and supervises accounting, payroll, and human resources.

    BS, Business Administration, California State University, San Jose.

  • Kate Young
    Kate Young
    VP, Resident Services

    Named a “Local Hero” by the MidPeninsula Media Center in 2011, Kate Young is committed to an empowering living environment for Alta Housing residents. She oversees The Resident Services Division, bringing onsite services in education, health, and social services to Alta Housing residents. She has been at Alta Housing for over 17  years.

    BA, Asian Studies, University of Puget Sound
    MA Candidate, Intercultural Relations, School for International Training
    ESL Certificate, Seattle University
    Founding Board Member, DreamCatchers
    Certified Youth Program Quality External Assessor

  • Keri Lung
    Keri Lung
    VP, Housing Finance and Portfolio Management


    Keri has 30 years of experience in affordable housing, economic development, urban and environmental planning. She joined Alta Housing part-time in 2016 after 11 years at MidPen Housing Corporation where she developed over 900 units of affordable housing, and 4 years at the Santa Clara County Housing Authority responsible for the award-winning “Opportunity Center” for the homeless. She began her career as an environmental planner for San Mateo County, managed large economic development projects in New York City, and led the Port of San Francisco’s first Planning and Development Division. Keri now provides strategic direction on the financing of affordable housing and optimal positioning of Alta Housing’s portfolio.

    BS, Applied Earth Sciences, with honors, Stanford University
    Masters in City Planning, Massachusetts Institute of Technology

  • Rubi Valencia
    Rubi Valencia
    BMR Administrator

    A Bay Area native Rubi Valencia is an active member of the Silicon Valley progressive community. With experience in affordable housing and the Below Market Rate program, she manages the City of Palo Alto Below-Market-Rate (BMR) rental and ownership programs, Mountain View Employee Homebuyer Loan Program and most recently, the City of Mountain View’s BMR rental program. Rubi is fluent in Spanish.


  • Daisy Madrigal
    Daisy Madrigal
    Office Manager

    Daisy is very passionate about helping her surrounding communities and providing assistance to those in need. Daisy spent some time in Southern California to pursue her B.S in Sociology Admin at the University of California, Riverside. She joined Alta Housing earlier this year as our Office Manager. She is responsible for overseeing operations and administrative activities for Alta Housing. In addition, she helps those looking for affordable housing learn about the process, inform on what is available and how to navigate it. Fluent in Spanish, Daisy takes pride in being bilingual to better serve her community and help aid individuals and families in need.