Our Initiatives


Sara Sorbello, Vice President

Sara serves as Vice President, Charter School Financing at LISC. In this role, she manages the origination and underwriting of LISC’s charter school facilities investments across the country. She also leads LISC’s research and policy contributions to the sector, including LISC’s new online platform, SchoolBuild: From Idea to Construction, and serves on the Charter School Lenders Coalition and other industry fora. Sara has more than fifteen years of community development finance and public policy experience, most recently serving as Vice President and Director of the New Markets Tax Credit program at Seedco Financial, where she oversaw investments in large scale job-creating projects across the country. Sara holds a M.A. in International Affairs from Columbia University's School of International and Public Affairs (SIPA) and a B.A. in International Relations from Dickinson College.  She is a member of the Board of Trustees of Friends of TEAM Academy.

Yvonne Tou Nolan, Deputy Director 

Yvonne manages Charter School Financing’s asset management, external funder reporting, and communications. She also underwrites transactions for high-performing charter school nationwide. Yvonne previously worked as Director of Operations at a charter school in Brooklyn, NY, and as an Associate in Market Risk Management and Analysis at Goldman Sachs. She holds a B.A. in Economics from Syracuse University. Yvonne is also a member of the Board of Trustees of Compass Charter School.

Crystal Langdon, Senior Program Officer

Crystal underwrites and manages the closing process for charter school facility investments. She assesses the financial position, academic success and organizational strength of potential borrowers.  Crystal holds an MBA in Real Estate and Finance from Baruch College. She has an extensive background in lending and real estate development.

Daniel Stinfil, Analyst

Daniel is responsible for providing research and analysis to support the underwriting of charter school transactions. He is also responsible for tracking and monitoring the performance of LISC’s charter school portfolio.  Daniel previously worked as an Operations Fellow and Director of Operations at North Star Academy, a charter school in Newark, NJ, and as a Money Market Fund Portfolio Manager at Deutsche Bank. He holds a B.A. in Political Science from University at Albany and an MBA from Columbia Business School.

Charmian Stewart, Administrative Assistant

Charmian joined LISC in 2012 and supports the department's daily and long-term activities. She holds a B.B.A. in marketing from Pace University.