Staff & Board


Nicki Olivier Hellenkamp, Policy Manager

As a Policy Manager, Nicki works with HDC members and partners to advocate together for increased affordable housing to meet the needs of our community. Nicki brings experience in policy analysis, direct advocacy, and organizing to her work, as well as a personal passion for increasing access to quality housing. Before arriving at HDC, Nicki worked as a union representative with United Food and Commercial Workers, Local 21. She received a Master of Social Work degree from the University of Washington and a BA in History from the University of Pennsylvania. She served on the Seattle Women’s Commission and enjoys baking and jogging. Contact


Sara Wamsley, Policy Manager

As a Policy Manager, Sara puts a life-long passion for equitable housing and development practices to work. She manages the HDC’s advocacy communication efforts and helps implement HDC’s annual advocacy and policy priorities. Prior to joining HDC, Sara was a Planning Commissioner for the City of Redmond, worked for the City of Kirkland and the US Department of Housing & Urban Development’s Equal Employment Opportunity Commission and Fair Housing & Equal Opportunity Office. She holds a BA in Sociology and Master of Public Administration from the University of Washington.  Contact

Loren Tierney, Member Services Director

As Member Services Director, Loren provides overall direction and support for HDC’s member services program, implementing a comprehensive member and business development agenda, and creating impactful programming for our wide array of membership in partnership with HDC’s Program Advisory Group. Prior to joining HDC staff in late June of 2014, Loren worked as Director of the Municipal League of King County and the Municipal League Foundation, and concurrently worked at the philanthropic, member-based Washington Women’s Foundation. Loren is excited to be working with HDC leaders, members, and friends to create a continuously robust and engaged member program. Please feel free to contact Loren with program ideas, or suggestions regarding membership.  Contact

Daniel Burnett, Member Services Associate

As HDC’s Member Services Associate, Daniel focuses on supporting the implementation of HDC’s member service agenda, as well as member outreach and communication; providing tools to sector leaders that help further the preservation and expansion of affordable housing. With a background in communication, event planning and clientele services, Daniel will help facilitate the fulfillment of member benefits from events to web services. As a long time immigrant from South Africa, Daniel has formed an appreciation for social services and a deep investment in their continued success. He is excited to be involved in such critical work. Contact

Juli Genovesi, Business and Resource Development Manager

As Business and Resource Development Manager, Juli helps drive growth in membership and increase resources to fuel the engine of our movement. Prior to joining HDC, Juli worked in the private sector as a Corporate Paralegal and Legal Services Administrator, where she coordinated all business and corporate development activity and managed the legal department of a global corporation. She left the private sector to unite her business acumen with her passion for social justice issues, and joins us with a degree from Seattle University emphasizing in Public Affairs / Nonprofit Leadership.

Juli’s interest in affordable and equitable housing is rooted in surviving homelessness and substandard housing in her childhood. She knows firsthand the long-lasting effects that housing insecurity has on children, and has been volunteering with organizations focusing on homelessness and affordable housing issues for nearly two decades. She is a founding member of Habitat for Humanity International’s Young Professionals Program, and currently serves as the Vice-Chair of their Advisory Council. Contact

Dan Cantrell, Operations Manager

As Operations Manager, Dan manages member dues invoicing, oversees technology vendors, works to ensure database integrity and coordination, supports the Executive Director and Finance Committee with financial tracking/reporting and budget development, tracks grant compliance and provides staff support for the HDC Charity Federation and several Affinity Groups. Prior to joining HDC, Dan was the Environmental Compliance Lead at a local computer refurbisher and recycler, and previously was executive director at northwest environmental nonprofits. Dan earned a Master of Public Administration degree from the UW’s Evans School of Public Affairs in 2006. Contact

Marty Kooistra, Executive Director

A champion of place-based strategies for community revitalization in the US and abroad for 27 years, Marty is recognized for progressive work in the areas of sustainable building practices, homebuyer financial readiness, community development, the rehabilitation and preservation of foreclosed and distressed properties, as well as board development and strategic alliances. A first career as founder and CEO of a successful diversified construction business, and a subsequent degree in social work, allowed him to merge his passion for the built environment with his commitment to social justice, and led him directly to the affordable housing sector.

Before coming to Seattle in 2008 to lead Habitat for Humanity Seattle/South King County, Marty held several leadership positions with Habitat for Humanity’s international headquarters (HFHI). He then served as Board President of HDC before being appointed as Executive Director in 2013. A past Bush Foundation fellow at the Joint Center for Housing and the Kennedy School of Government at Harvard, Marty currently co-chairs the University of Washington’s West Coast Poverty Center Housing Roundtable and serves on the boards of Global Washington, Emerald Cities Seattle, HomeAid Puget Sound, and NACEDA. Previous appointments include All Home’s coordinating board and the City of Seattle’s Housing Affordability and Livability Agenda (HALA) committee. Contact

2018 HDC Board of Directors

Executive Officers:
President: Brian Lloyd, Beacon Development Group
Vice-President: Andrea Sato, Kantor Taylor

Secretary: Mark Gropper, Renton Housing Authority
Jill Fleming, Capitol Hill Housing

Mark Ellerbrook
, King County Housing & Community Development
Amy Besunder, Bellwether Housing

Joel Ing, Edge Developers
Douglas Ito, SMR Architects
Grace Kim, Schemata Workshop

Michelle Morlan, Lotus Development Partners LLC
Miriam Roskin, Seattle Office of Housing
Kristin Pula, HomeSight
Rob Van Tassell, Catholic Housing Services
Kira Zylstra, All Home
Obinna Amobi, Mercy Housing Northwest, 2018 Board Fellow