Our Team

Learn about the dedicated leaders behind ECS's work.

Leadership Team

Beth Stokes
Executive Director

Beth has nearly 20 years of experience in housing and homeless services, with her work beginning at the Coalition on Homelessness. Most recently, Beth served as the Western Region Managing Director for the Corporation for Supportive Housing (CSH), based in Los Angeles. Previously, she was Director of Programs for the Los Angeles Homeless Services Authority and served as Executive Director of Hamilton Families. Beth received her MSW in Social Welfare, Administration and Planning from San Francisco State University.

Chris Callandrillo
Chief Operating Officer

Chris has over 20 years of experience in the administration of programs and services for people experiencing homelessness, including: families and children; single adults; seniors; Transitional Aged Youth; and, those affected by HIV/AIDS. Chris worked with Catholic Charities of San Francisco for 14 years before accepting the role as Director of Programs at the Los Angeles Homeless Services Authority (LAHSA). Chris holds a BA in English from UC Berkeley, as well as an MA in Education from Stanford University.  

Eric Larra
Chief Financial Officer

Eric joined ECS in September 2014. Eric is a seasoned financial professional with over 25 years of experience including accounting and auditing, financial management and analysis, business planning and consulting. His previous employers include KPMG, Levi Strauss & Co, the Sierra Club, and Northern California Presbyterian Homes and Services.

Julie Leadbetter
Chief Program Officer

Julie has more than 20 years of experience in homeless services, affordable housing, healthcare, and community development. She most recently served as Director of System Coordination at EveryOne Home where she was instrumental in establishing Alameda County’s coordinated housing crisis response system. She was the Founding Director of San Francisco’s first Navigation Center and started her career at Mission Housing Development Corporation. Julie managed Strategic Initiatives and Legislative Affairs for the New York City Housing Authority, the nation’s largest provider of public, affordable housing, and has also consulted for Portland Public Schools.

Christina Alvarez
Senior Director, Development

Christina joined ECS in October 2019. She has extensive experience in the nonprofit sector and possesses strong fundraising and management acumen. In her previous role, Christina served as Executive Director of The Gubbio Project, an organization committed to providing sanctuary and services for unhoused people at St. Boniface Church and St. John the Evangelist in San Francisco. At The Gubbio Project, Christina conceptualized and executed an innovative development and communications plan, managed fund development strategies focused on multiple constituencies, and identified opportunities for growth and cultivation of new relationships with partner organizations.

Jan-Marie Bannon
Director, Strategic Initiatives

Jan-Marie joined ECS in 2018 with more than 20 years of project management experience in both the private and non-profit sector. She has project managed the development of corporate strategic plans and worked closely with change management consultants to implement trainings and integrate improved systems and processes. Jan-Marie has spent many years volunteering with diverse communities at such organizations as La Casa de las Madres, St. Anthonys and Shanti Project. She currently volunteers with Zen Hospice. Jan-Marie holds a Bachelor of Arts in Psychology with a Minor in Sociology from San Francisco State University.

Michelle Diaz
Senior Director, Human Resources

Michelle is an accomplished HR professional with 19 years of extensive experience in all aspects of Human Resources. She joined ECS coming from the security industry, where she held similar positions of Regional Labor Relations Manager, Regional Director of Human Resources, and Divisional Director of Recruitment. 

Scott Ecker
Senior Director, Housing

Scott has been with ECS since 2001, and managed the Support Services teams at several of our housing sites before becoming the Director of Housing Services. Scott holds a BA in psychology and an MS in clinical psychology, and offers over 20 years of experience working in the community mental health and supportive housing fields. 

Carrie Gray
Director, Coordinated Entry

Carrie joined ESC in December 2019 and oversees ECS’s operation of San Francisco’s Adult Coordinated Entry system. Previously, she was a Program Coordinator at the U.S. Department of Veterans Affairs in Los Angeles, where she coordinated outreach to connect veterans with federal services. Carrie holds a Bachelor’s and Master's degree in Social Work, in addition to being a Licensed Clinical Social Worker and Air Force veteran.

Liz Pocock
Senior Director, Housing Development and Asset Management

Liz has worked in affordable and supportive housing since 1999. Prior to joining ECS, Liz was Director of Property Management for Citizens Housing Corporation and also spent four years working with asset management and affordable home ownership programs at the Los Angeles Community Design Center (now Abode Communities). Liz holds a BFA from New York University.

Jason Pruett
Director, Workforce Development and Social Enterprise

Jason has over 8 years of experience working in not-for-profit workforce development and food-related social enterprises in Chicago, IL. He has worked directly with the recruiting and training of agency participants, fostering relationships with prospective employers, developing/revising food-service training curriculum, promoting the organization through public speaking engagements, implementing budgeting and revenue goals for the social enterprise along with cooking and serving meals to agency participants and the public. 

Liz Tarzon
Director, Healthy Aging

Liz joined ECS in November 2018 with over 15 years of experience in working with seniors with a wide range of needs and economic backgrounds. She holds an MA in Gerontology and has enjoyed a variety of roles in areas of Case Management, Programming, Staff Training and Administration. Her work has given her great exposure in finding solutions to the difficulties seniors face including cognitive issues, affordable housing, diminishing mobility and end-of-life care. 

John Warner
Senior Director, Interim Housing

John started his career with ECS in 2008 as a Case Manager III in our Housing Department. He has since moved into several other positions over the years, including Support Services Manager at the Mission Navigation Center, and Senior Support Services Manager for all ECS Navigation Centers. Since 2019, John has been the Associate Director of Navigation Centers. Prior to joining ECS, John worked for Walden House and Burt Children’s Center. He holds a Bachelor of Arts in Psychology with a Minor in Communications from Curry College.