California Housing Partnership

Danielle M. Mazzella

Associate Research Director

San Diego, CA

Danielle M. Mazzella

Danielle M. Mazzella joined the California Housing Partnership in January 2016. As Associate Research Director, Danielle is responsible for research on the preservation of affordable housing and housing needs analyses at the state, regional, and local level with partners and local governments. She was promoted from Senior Research Manager in 2024.

Prior to joining the California Housing Partnership, Danielle worked at the Non-Profit Housing Association of Northern California (NPH) where she collected data on existing financing mechanisms and policies for affordable housing, performed GIS analysis, and assisted in legislative advocacy efforts.

Danielle received a M.A. in Geography from San Francisco State University in 2016, and received a B.A. in Sociology from the University of California, Santa Cruz in 2013.

Diep Do

Managing Director, Financial Consulting

San Diego, CA

Diep Do

Diep Do joined the California Housing Partnership in 2013 and has 25 years of experience in affordable housing development and finance. As Managing Director, Financial Consulting, Diep oversees the Partnership’s housing finance consultants and provides financial consulting, technical assistance, and training to our nonprofit and public agency partners throughout California. She advises clients on structuring financing plans utilizing Low-Income Housing Tax Credits, tax-exempt bonds, state HCD and CalHFA programs, and federal and local housing programs.

Prior to joining CHPC, Diep was the Director of Housing Development for Satellite Housing where she was a member of the senior leadership team responsible for managing Satellite’s merger with Affordable Housing Associates, as well as overseeing Satellite’s real estate development department. Prior to Satellite, Diep was Director of Housing Development at Tenderloin Neighborhood Development Corporation where she oversaw the development of more than 1,600 affordable homes for San Francisco’s lowest income residents, totaling more than $600 million in financing. In addition, Diep played an active role in policy development both within TNDC and in the broader nonprofit housing community.

Diep was selected as a Northern California Real Estate Woman of Influence by the San Francisco Business Times in 2011 and as a Young Leader in Affordable Housing by the Affordable Housing Finance Magazine in 2008. She received a M.A. in Urban Planning and a B.A. in Urban Studies from the University of California, Los Angeles. Diep previously served on the NPH and SCANPH Boards of Directors. She currently serves on the San Diego Housing Federation Board of Directors and has led the training for the Federation’s annual Fundamentals of Affordable Housing Institute.

Siera Beal

Grants & Communications Manager

San Diego, CA

Siera Beal

As Grants & Communications Manager, Siera oversees the Partnership’s cross-platform marketing, design and outreach efforts. She also leads the Partnership’s fundraising efforts and is a key resource for our foundation partners. Siera joined the California Housing Partnership in 2021 as a Housing Finance Specialist. For more than two years, she provided financial technical assistance and support to the Partnership’s Housing Finance team to guide affordable housing developments in obtaining funding from an array of federal, state and local competitive programs (LIHTC, tax-exempt bonds, HUD, HCD, and others).

Prior to joining the Partnership, Siera worked as a Lending Program Officer at LISC, where she originated and managed predevelopment and acquisition loans for affordable housing and community development projects across San Diego County and developed the organization’s first-ever down payment assistance program. Before venturing into the affordable housing and community development realm, Siera spent most of her career in commercial real estate finance specializing in hospitality. A proud native Ithacan, Siera earned her B.S. in Hotel Administration from her hometown alma mater, Cornell University. She also holds an M.B.A. from the UCLA Anderson School of Management and is currently pursuing an M.L.I.S. with San José State University concentrating in Archives & Preservation.