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Our Team

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Our Team

TNDC is a team of over 400 people committed to building a future where people of every income, race, spoken language, gender identity, and sexual orientation can thrive. Below you can see our management team, board, and spotlights of staff-members across our organization.

You'll notice that our bios include people's personal pronouns. As an organization founded on values of inclusivity and mutual respect, we encourage our staff to share their personal pronouns and foster a welcoming environment for all genders and gender non-conforming people. Learn more about why personal pronouns matter.

Walter Harris headshot

Walter Harris

Chief Executive Officer

pronouns: he/him

Walter, MBA, PMP, began as TNDC’s Chief Executive Office in October 2021. Prior to TNDC, Walter was with Kaiser Permanente, where he served as the Senior Vice President and principle business officer at the Bernard J. Tyson School of Medicine (KPSOM).

Walter has more than 25 years of executive experience from the private sector and in the federal government, having served in senior executive-level positions in several prominent organizations. Prior to joining KPSOM, Walter served as the Vice President/COO at the George Washington School of Medicine and Health Sciences (GW-SMHS) in Washington DC. Prior to joining GW-SMHS, he served at the U.S. Food and Drug Administration (FDA) as the Deputy Commissioner for operations and global Chief Operating Officer, providing strategic and innovative operational services to the Agency's more than 16,000 staff, overseeing a budget of over $4 billion along with a $450 million IT portfolio.

Before joining the FDA, he served at Center for Disease Control and Prevention (CDC) in Atlanta, Georgia, as Chief Management Official and principle business officer at the Center for Health Information Services and the Office of Surveillance, Epidemiology and Laboratory Services. While at the U.S. Housing and Urban Development (HUD) in Washington D.C., Walter served as the Deputy Chief Information Officer and led the development and implementation of technology services that supported HUD’s 10,000 staff and public housing authorities across the United States.

In his previous role at the Veterans Health Administration, Walter served as the Director of Enterprise Systems Management. Walter served close to 20 years as a hospital leader and executive with Sodexho Marriott/HCA and Community Health Systems, where he ran efficient hospital operations and provided critical healthcare services to the community.      

As a top-performing official, Walter has also garnered multiple awards and honors including the FDA Distinguished Service Award,  Executive Leadership in Government Award from the Association For Federal Information Resource Management (AFFIRM), Top Blacks in Healthcare Award from BlackDoctors.org, Top Executive Leader Award from Maryland India Business Roundtable Inc., the CDC Directors Award, the Health Commendation Award from the Under Secretary for Health for the U.S. Department of Veterans Affairs and the Special Contribution Award from the Veterans Health Administration.

Walter holds a Master’s degree in Business Administration, is an International Coaching Federation certified executive coach, and a Project Management Institute certified project manager.  

Walter served as a Sergeant in the United States Air Force and was selected to serve as a Pentagon liaison to Secretary of Defense Caspar Weinberger. He was also recalled to service during Operation Desert Storm.

In his spare time, Walter enjoys spending time with family, traveling, jazz, and golf.

Diane Heffner

Daphne "Diane" Heffner

Chief People Officer

pronouns: she/her

Diane joined TNDC in November of 2020 as the Chief People Officer. As a Senior Level executive with over 18 years of progressive HR Operations experience, Diane specializes in leading, implementing, and achieving transformative change, mitigating risks of employment-related litigation, and building “Best in Class organizations.

Prior to joining TNDC, Diane was the Vice President of Human Resources and Administration for the Chicago Urban League. Diane has also led District and Regional level teams for three of the largest retailers in the country; Walmart, Sam’s Club, and the Home Depot. During her tenure she successfully managed high-performing diverse teams throughout multi-unit locations with volumes up to 800 million in annual sales.

Diane is a spirited, progressive leader with demonstrated abilities to problem-solve, motivate teams to deliver measurable results, and empower them to propel forward. Diane’s decisions are guided by her core values of Integrity, Humility, Passion and Hope. It's under these values that she has led in fostering a world-class employee experience throughout her career.   

Ron Lathouwers

Ron Lathouwers

Chief Financial Officer

pronouns: he/him

Ron joined TNDC in December 2020 as Chief Financial Officer and brings a broad range of financial, real estate, and nonprofit experience.  Ron has been a CFO in the real estate industry for the past twenty years including at a real estate management and development company with vast holdings in San Francisco. Ron has also served as CFO for nonprofit organizations and earned his Certified Public Account (CPA) license while working in Public Accounting, where he began his career. Ron left his hometown of Chicago to move to San Francisco when he accepted a position as CFO at San Francisco’s French Hospital and later at San Francisco General Hospital. He earned a Bachelor’s degree in Accounting from the University of Illinois in Champaign-Urbana and obtained Master’s degrees in both Finance and Health Care Administration from Northwestern University’s Kellogg School of Business.

Liz Orlin

Liz Orlin

Chief Operating Officer

pronouns: she/her

Liz joined TNDC in June of 2006 as Chief Operating Officer. Prior to TNDC, she served as Associate Director for the Corporation for Supportive Housing (CSH) in Oakland. She also served as Program Officer and Assistant Program Officer from 1998 through early 2003. Before CSH, Liz worked for the Trustees of Columbia University’s School of Social Work (SSW) Program in New York where she was a program director and program supervisor, as well as a senior case manager. Liz has completed social work internships from the CSS Program and the Sunset Park Mental Health Clinic in Brooklyn and began her career in social work at the Women Against Abuse Legal Center in Philadelphia in 1988. She has a Master’s degree in Public Health from Columbia University, a Master’s degree in Social Work from New York University, and a Bachelor’s degree in Sociology and Anthropology from Haverford College.

Evelyn Catalan

Evelyn Catalan

Senior Director of Property Operations

pronouns: she/her

Evelyn joined TNDC in September 2019 as Senior Director of Property Operations. Her responsibilities include the oversight of the property management portfolio where she is responsible for assessing, enhancing, and maintaining stable operations amid significant growth. Prior to joining TNDC, Evelyn was a Director of Property Operations/Director of Compliance at MidPen Housing Management where she held various positions in the Property Management division. Evelyn started her career in property management in 1988 and has worked managing non-profit communities since. She initiated her career at Housing Development & Neighbourhood Preservation Corporation, a nonprofit housing development corporation in San Francisco and then at the John Stewart Company as a Property Supervisor for the TODCO portfolio. Evelyn holds a Bachelor's degree in Business Administration with a concentration in International Management from Golden Gate University. She has served on the Association of Housing Management Agents for Northern California and Hawaii and is currently board President.

Wendy Chan

Wendy Chan

Senior Director of Finance

pronouns: she/her

Wendy joined TNDC in 2000 and serves as Senior Director of Finance.  She is responsible all aspects of TNDC’s corporate, property management and real estate development accounting, overseeing a staff of 10.  With total assets of $1 billion and annual revenue of $80 million, TNDC’s accounting department manages the annual audits of the financial statements of 35 related entities in addition to TNDC. 

Prior to joining TNDC, she was a Director of Finance at Community Housing Partnership in San Francisco and Controller at Jubilee West, a nonprofit low-income housing corporation in West Oakland. Wendy started her career in real estate finance and accounting in 1988, holding a Bachelor’s degree in Business Administration and Accounting from Portland State University.

Katie Lamont

Katie Lamont

Senior Director of Housing Development

pronouns: she/her

Katie joined TNDC in April 2012 as Director of Housing Development. She is responsible for leading the Housing Development team as it carries out all phases of development from feasibility through acquisition, predevelopment, construction, and completion. Prior to joining TNDC, Lamont worked for Eden Housing, most recently as Associate Director of Real Estate Development, where she supervised junior staff, led new business development activity, worked on policy, and managed her own project teams implementing all aspects of affordable housing development, including mixed-use and mixed-tenure developments and joint ventures with homebuilders and service providers for 9 years. Prior to joining Eden in 2003, Katie was a project manager at the Los Angeles Community Design Center, now Abode Communities. She began her career working in fair housing at Housing Opportunities Project for Excellence in Miami, Florida. Lamont has a Master’s degree in Urban Planning from the University of California, Los Angeles and a Bachelor’s degree in American Civilization from Brown University.

Erin Mascaro

Erin Mascaro

Senior Director of Human Resources

pronouns: she/her

Erin joined TNDC in 2013 and currently holds the position of Director of Human Resources.  Prior to joining TNDC, Erin was the Human Resources Manager for ETIC, an environmental consulting firm. Before ETIC, Erin held several Human Resources Specialist positions at Bay Area News Group and Environmental Resources Management.  Erin earned a Bachelor’s degree in Management with a concentration in Human Resources Management from Golden Gate University.

Yvette Robinson

Yvette Robinson

Senior Director of Tenant & Community Services

pronouns: she/her

Yvette Robison is the Senior Director of Tenant & Community Services. She joined TNDC in 1991 as the Director of Co-Op Development and was promoted to Director of Tenant Services shortly after. She has over 20 years of wide-ranging experiences in program and community development, including designing and managing  programs for children, youth, families, seniors, and single adults living in communities of color with low-incomes. She has a Bachelor’s degree in Social Welfare and Visual Arts from Antioch College.

Val Langmuir

Val Langmuir

Director of Information Technology

pronouns: she/her, they/them

Val joined TNDC in May of 2018. As IT Director, Val is responsible for managing IT service delivery and technical vision across the organization. Val came to TNDC with many years of experience as an IT technical lead in the nonprofit and commercial sectors. Born in the Bay Area and educated in the United Kingdom, Val holds a Bachelor’s degree in Mathematics from Imperial College, London.

Todd LeFurge

Todd LeFurge

Director of Asset Management

pronouns: he/him

Todd joined TNDC in March 2001. As the Director of Asset Management, he is responsible for defining and expressing owner goals for TNDC’s rental real estate portfolio.  Asset Management prepares property-specific asset management plans from analysis of problems and opportunities, proposes major investments and portfolio investment priorities, and executes plans such as re-financings and partner exits. The department is also responsible for managing surplus, fees, insurance and risk, property tax, audited financial statement review and property watchlisting. Todd has a Bachelor’s degree in Philosophy from Grinnell College.
 

Enrique Ovando headshot

Enrique Ovando

Director of Fund Development

pronouns: he/him

Enrique joins TNDC with a diverse background of more than 25 years in the areas of Fund Development and sales to benefit nonprofit and corporate enterprises. He has deep experience, most recently at The Salvation Army, in key areas of fundraising including Individuals, Foundations, Corporations, Events, and Government, having secured multiple million-dollar donations and municipal contracts, and deepened partnerships with groups like Google, Kaiser Permanente, Golden State Warriors, and the City and County of San Francisco.  Enrique is a native San Franciscan, who grew up in the Mission District, and currently resides in the Noe Valley Neighborhood with his family. In addition, he is fluent in Spanish and has a Bachelor’s degree in Marketing and Master of Business Administration (MBA) in Business Management.  

Mark Puchalski

Mark Puchalski

Director of Facilities

pronouns: he/him

Mark joined TNDC in May of 2020 as Director of Facilities. Mark is a certified Systems Maintenance Administrator and has over 30 years of experience in facilities operations, management, and maintenance. Mark is a proven leader and has created and implemented facilities and sustainability programs within the semiconductor, software, government, education, transportation, and commercial real estate sectors.

In 2018 Mark decided he would bring his vast skill set to the world of nonprofit housing to do his part to help curb the growing housing crisis plaguing our communities.

Alec Raffin

Alec Raffin

Director of Operations

pronouns: he/him

Alec joined TNDC in March 2020 as Director of Operations. He is responsible for directing organization-wide operational effectiveness projects and overseeing the team responsible for supporting the organization’s business infrastructure. With over 20 years of experience in the nonprofit sector, his work has focused on generating positive social impact by creating and sustaining programmatic, fiscal, and operational effectiveness initiatives. He was the founding Executive Director of Mpower, a Colorado-based nonprofit organization, and ran Streetside Stories, a San Francisco-based nonprofit that cultivated the voices of young people by teaching them how to write, illustrate, and share stories that honor their personal experiences. Most recently Alec served as a Senior Advisor for Fiscal Management Associates, a nation-wide consulting firm that helps nonprofit organizations strengthen their operational and fiscal capacity to effectively meet their missions. Alec is a San Francisco Bay Area native and holds a Bachelor's degree in Anthropology from the University of California, Berkeley.

Delene Rankin

Delene Rankin

Director of Supportive Housing Services

pronouns: she/her 

Delene joined the TNDC team in 2000. Born and raised in Brockton, Massachusetts, Delene holds a Bachelor's degree in Political Science from University of Massachusetts Amherst and a Certificate in African Studies from the Five Colleges Consortium. After graduating, Delene joined the Peace Corps serving as an health educator in Nigeria for two years. After the Peace Corps she earned a Master’s degree in Social Work from the Tulane University School of Social Work and a Master’s degree in Public Health from Tulane University School of Public Health and Tropical Medicine. Delene began her career in social work as a family worker in a residential facility for teens focusing on family reunification. Before joining TNDC she spent four years as a medical social worker at an HIV/AIDS clinic in New Orleans. 

Colleen Rivecca

Colleen Rivecca

Director of Community Organizing, Policy & Planning

pronouns: she/her

Colleen joined TNDC in 2018 as the Senior Community Organizing Manager and is now Director of Community Organizing, Policy & Planning. Since 2005, Colleen has worked with the Tenderloin community to address issues related to homelessness, hunger, health, and access to public benefits. After receiving her Bachelor's degree in Social Work with departmental honors from Grand Valley State University in Grand Rapids, Michigan, she studied Social Work with a concentration on Community Organizing at City University of New York, Hunter College School of Social Work.

Jason Seals headshot

Jason Seals

Director of Racial Equity & Inclusion

Jason has over two decades of experience serving his community locally, nationally, and globally as an educator, thought leader, and change agent. Jason carries the tradition of activist-intellectual to address critical systemic issues and advocate for personal and social transformation. Jason believes in the power and importance of centering those most systematically marginalized in service of true equity and justice. 

Jason began his career in youth development serving in multiple roles across the nonprofit, mental health, and juvenile justice sectors. After obtaining his Master’s degree in Africana Studies from the University of Albany, Jason leveraged his love for transformational educational practices and Africana studies in the classroom, teaching ethnic studies and manhood development courses at multiple high schools, colleges, and universities across the Bay Area. Through his consulting practice, Jason has worked with a wide range of clients across multiple sectors in the areas of anti-racism, radical healing, parenting/fatherhood, and systems change. 

The role that Jason is most passionate about is his role as a father. His love for his own children is reflective in the work he does to rebuild families and communities as a means towards healing and wellness.