Our Experts
Executive Director
Lama Hassoun Ayoub
PhD, MsPH
With more than 15 years of experience, Lama leads Partners for Social Impact — helping nonprofits, foundations, and government agencies leverage research and evaluation to deepen social impact. Known for her relationship-centered approach, she brings rigorous methods, participatory practices, and community expertise together. She is an expert facilitator, trainer, and member of the ACE Evaluation Network.
Expert
Andrew Martinez
PhD, MSW
A Senior Researcher at Partners for Social Impact and a bilingual scholar-practitioner specializing in research, evaluation, and systems improvement. With more than 15 years of experience, Dr. Martinez has led complex evaluations for government agencies, school districts, and foundations across the justice and education systems. His expertise spans restorative practices, school safety, juvenile justice, and firearm violence prevention, including the most comprehensive study of youth who carry illegal firearms in New York City. He has authored 30+ peer-reviewed publications and holds a Ph.D. in Community Psychology and an MSW.
Senior Researcher
Betsy Santos-Flores
MA
A survey specialist with more than 25 years of experience, Betsy designs mixed-method studies across nutrition assistance, workforce development, and justice. She led large-scale federal research at Mathematica for USDA, HHS, DOL, and DHS. Bilingual in English and Spanish, she brings a culturally responsive lens to engaging diverse and underserved communities. Based in New Jersey.
Board of Directors
Board Member & Senior Advisor
Osob Issa
MSW
Program Coordinator in Psychiatry at Boston Children's Hospital and clinical social worker at the Trauma and Community Resilience Center. Devoted her career to helping marginalized populations access mental health services, providing trauma-informed training and consultations across sectors.
Board Member
Sean Youngren
Bio forthcoming.
Board Member
Hassan Ayoub
Bio forthcoming.