social impact exchange team

Meet the Team


Alexander Rossides

Founder and President

Alexander brings extensive experience as a social entrepreneur, business executive and investor to GPN…

Jennifer Cleghorn

Associate Vice President, Education

Jennifer brings extensive experience in working with foundations, nonprofits and government…

Bridget Greeley

Senior Manager, Education

Bridget Greeley is the Senior Manager of Education Initiatives at Growth Philanthropy Network. She focuses on the Massachusetts Systems Initiative…

Margaret Linehan


Margaret Linehan is the Finance and Operations Manager for Growth Philanthropy/Social Impact Exchange…

David Persky

Manager of Health Initiatives

David Persky is the Manager of Health Initiatives at SIE. He is also currently pursuing a Master of Science in Organization…

Anne Sherman

Vice President, Nonprofit Strategy

Anne Sherman is Vice President, Nonprofit Strategy at Growth Philanthropy Network. Before GPN, she was Director…

Social Impact Exchange Board 2019

  • Rob Densen, Founder & CEO – Tiller, LLC
  • Paul Gilbert, Co-Founder & Former CEO – MedAvante
  • Antoinette La Belle, Senior Advisor and Former Managing Director & COO – Just Capital
  • Christopher Langston, Chief Executive OfficerArchstone Foundation
  • Banny Banerjee, Director and Founder Stanford Change Labs
  • Keisha Senter, Founder The Solution Senter
  • Alexander Rossides, Founder & PresidentGrowth Philanthropy Network