Faith in New York Staff

C. WalthallCrystal Walthall
Executive Director
Crystal is a native of East New York, Brooklyn and former NYCDOE U.S. History teacher of 5 years. She holds a Bachelor of Arts in History from Binghamton University and a Master of Arts in Social Studies Education from Hunter College. She has been involved in the work of education and advocacy for over 10 years. Crystal is committed to work around youth empowerment, college and career initiatives, socio-economic inequality in Black and Latinx communities, and immigration reform with the National Latino Evangelical Coalition (NaLEC). In addition, Crystal uses her love for music and poetry to create opportunities to intersect social justice advocacy with the creative arts.


M. Leslie Marguerite Leslie
Director of Development
Marguerite was born in San Francisco and raised in New York with a short stint in Mississippi. Marguerite graduated from Adelphi University with a Bachelor of Arts in Anthropology and has used her writing skills as a freelance writer in various capacities for artists, educators, and other professionals over the past ten years. She's proud to count women of color as her primary clientele including doctoral students and graduates and an Academy award winning filmmaker. Marguerite comes to Faith in New York after working on grants for artists and as a grant writer for the Learning Disabilities Association of NYC (LDA-NYC). As a fundraising consultant with Faith in New York, Marguerite writes grants and assists with development in support of FINY's larger goal of engaging faith communities in transformative change for our neighborhoods.

Marilyn Joseph
Census & Civic Engagement Manager

Marilyn Joseph, a Harlem District Leader for the 70th Assembly District from 1997-2007. Marilyn Joseph is civically engaged in her hometown Harlem, New York.  In 2001, she was appointed Program Director of The Baby College (TBC), a premier program of the Harlem Children’s Zone (HCZ).  Under her leadership, the organization graduated over 6,000 families. In 2010, Marilyn accepted an additional role as the founding Program Director of The Baby College Guardian Responding and Developing Strategies (TBCGRADS) program and in 2012, she was promoted to the role of Senior Manager of Early Childhood and Community Programming. She later accepted leadership of the Parenting and Community Engagement Department.  She recently retired from the role in 2018, after 27 years of service.  Her work for HCZ has been highlighted on Oprah, NPR and an array of other mediums.

Marilyn served as the first female and youngest President of the Frederick E. Samuel Political Club.  Currently, she serves on the Board of Uptown Grand Central, Neighborhood Women’s Collective and Harlem Advocates for Seniors. She is also the Deputy Executive Director for the Samuel Foundation which has two programs:  Slam Jam a sports program for girls and Harlem Got Talent, a music appreciation program.

Marilyn received her B.A. from the College of New Rochelle and has completed the Developing Leaders Program at Columbia University Business School. She is married and raising her daughter -- a future queen -- in Harlem.

Anthony Perez
Senior Community Organizer - Immigrant Justice

Isha Sumner
Community Organizer - Manhattan & Bronx

Catherine Salazar
Community Organizer - Brooklyn & Queens

Renee Walthall
Development and Operations Associate

Board of Directors

Bishop James I. Clark Jr., Christ Temple Church of the Apostolic Faith
Pastor Brian Ellis-Gibbs, Queens Baptist Church
Rev. Greta Gainer-Anderson, Carter Community AME Church