Our Initiatives


Reena Abraham, Vice President of Education

Reena manages LISC’s growing charter school facilities portfolio. She seeks out capital and grants from foundations, banks and public resources and works to works to improve the sector by sharing loan and bond performance data and by disseminating research on financing options for charter schools. She was selected to be a 2015 Council of Urban Professionals fellow. Reena holds an M.B.A. from New York University. In her free time she enjoys cooking and rock climbing with her husband.

Sara Sorbello, Director of Charter School Financing

Sara manages the origination and underwriting of LISC’s charter school facilities investments, including strategic sourcing of charter lending opportunities in communities where LISC works. Sara screens loan requests from charter schools and leads a team of underwriters through the credit risk analysis, due diligence and structuring of transactions to support the growth of high-performing charter schools. She also supports policy and advocacy work through participation in the Charter School Lenders Coalition and other industry fora. Sara lives in Brooklyn with her husband and two young kids, a budding musician and an aspiring princess, and enjoys spending time outdoors and seeing live music with her family.

Yvonne Tou, Senior Loan Officer

Yvonne evaluates the credit risk, and manages the due diligence, underwriting, and closing of transactions benefitting high-performing charter schools nationwide. She also provides technical assistance to schools on project planning, development models, and financing options. Yvonne has nine years of analytical experience in both the private and non-profit sectors, and worked as Director of Operations at a charter school in Brooklyn, NY. She holds a B.A. in Economics from Syracuse University. Yvonne is an avid Syracuse University college basketball fan and enjoys cooking.

Arkady Ho, Asset Manager

Arkady monitors, tracks and reports on LISC’s charter school portfolio and provides loan administration for portfolio schools. He also works with internal and external partners to collect data and reports. In addition, he analyzes academic and financial data and other quality indicators of portfolio schools. Arkady holds a B.A. in quantitative economics from Tufts University. Outside of the office, he enjoys playing basketball and learning bad pop songs on the guitar.

Crystal Langdon, 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. In her free time she enjoys reading, gardening, and hiking in the woods with her family. 

Sybil St. Hilaire, Program Officer

Sybil is responsible for marketing, communications and event planning, including the Second Annual Bonds and Blackboards conference and policy briefings before congressional staff in Washington. She also supervises the redesign and updating LISC's web presence around charter school financing, in addition to building a new research tool. Sybil holds a B.A. in sociology from Harvard University. When she isn’t taking soca or dancehall classes, she enjoys volunteering with America Needs You, KIPP through College and the Diversity Awareness Initiative for Students.

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. Outside of work, Charmian enjoys drawing and painting, black and white movies from the 1930-1960’s and (she's a bit ashamed to admit) watching celebrity/entertainment news.