Staff Leadership

Staff Leadership

Maria Cristalli President and Chief Executive Officer
Maria has held a variety of leadership positions since joining the agency in 1991. She is responsible for the overall leadership and administration of a team of nearly 2,000 individuals working for youth and families in New York and Maryland. Hillside is one of the largest family and children’s services agencies, and the most diversely funded and geographically diverse agency of its kind, in New York State.

Maria Cristalli

Elizabeth Nolan Chief Operating Officer
Elizabeth provides leadership, management and vision necessary to ensure that Hillside has the proper operational controls, administrative and reporting procedures, and systems in place to insure growth, financial strength and operational efficiency.

Elizabeth Nolan

Augustin Melendez Chief Human Resources & Organization Development Officer
Augie is responsible for developing and executing human resource strategy in support of the overall business plan.

Augustin Melendez

Christopher Peterson Chief Financial Officer
Chris’ responsibilities include providing comprehensive fiscal analysis and oversight for Hillside. As a member of the Chief Executive Team, he plays a lead role in charting the organization’s future and fiscal wellbeing.

Christopher Peterson

Ann S. Rollo Chief Advancement Officer
Ann leads the coordinated efforts of the Hillside Foundation and our Communications & Marketing team, and provides a strategic vision for all fundraising activities and programs. This includes developing and executing philanthropic strategies, promoting Hillside and its services to varied constituencies, and generating new interest in and support for our community-oriented mission.

Ann Rollo

Darlene Ryan Chief Performance Officer
Darlene’s responsibilities focus on the models, practices, supporting tools and processes that drive positive outcomes for youth and families served by Hillside. She also leads Hillside’s Practice and Performance Excellence Group, which includes the Research, Business Intelligence, Quality, Risk Management and Data Integration teams.

Darlene Ryan

Michael Snyder, JD General Counsel