Chair

Mr. Papantonis was elected as Chair of the Board of Directors in 2019, after serving as Vice Chair since 2017. He is an engineer and President and founder of Nauset Construction, a full-service construction company providing pre-construction, construction management, design-build, and general contracting services throughout New England.

Vice-chair

After serving for twelve years as a member of the Family Selection Committee and serving three years as the Chair of the Breakfast Event Committee, Mary Cerio was elected to the Board of Directors in 2021. She is the CEO and Co-Founder of 42 North Capital, a real estate private equity firm focused on value-add investments throughout New England. In her role as CEO, she is responsible for the firm’s operations oversight, capital raising, investor relations, and portfolio management.

Mr. Brown joined the Board in 2017. As Managing Director of Real Estate at Preservation of Affordable Housing (POAH), he oversees the activities of all real estate development staff, manages resource allocation and department budgets, and establishes strategic initiatives for the organization. Mr. Brown is a member of the Board of Trustees of the Boston Architectural College and a member of the Town of Sherborn Zoning Board of Appeals.

Jonathan Evans, Principal at MASS Design Group, leads the Boston Studio focusing on justice-oriented civic and housing projects. Notably, he oversaw “The Embrace” memorial. A Boston Civic Design Commissioner, Jonathan is dedicated to enhancing the public realm and serving historically underserved communities through impactful, large-scale architectural design and master planning.

As a Build Day volunteer for over 21 years and after serving in the Homeowner Selection Committee for 9 years, Sergio Toscano was elected to the Board of Directors in 2022.  He has served as the Chair of Habitat’s Homeowner Selection Committee since 2021. Mr. Toscano is Vice President of IT Risk Governance at Brown Brothers Harriman, a privately owned and managed financial services firm.  As Vice President, he is responsible for managing technology audit and regulatory requirements against an industry technology control framework and coordinating official responses to reduce risk exposure.

President and CEO

Jim Kostaras, President and CEO of Habitat for Humanity Greater Boston, is a registered architect and urban planner. His leadership includes roles at the Institute for International Urban Development and the City of Somerville. A former Harvard lecturer and BPDA Assistant Director, Jim has over 30 years of community experience.

After serving for over 15 years as a member of the Family Selection Committee, Shelly Gouin was elected to the Board of Directors in 2025.  She is an Officer of Debt Capital Markets at TA Realty, a real estate private equity firm.  Prior to joining TA Realty in 2022, Shelly worked in commercial real estate lending at various banks in Boston for 17 years.  She is a past board member of the Real Estate Lenders Association in Boston and current board member (and past president) of CREW Boston.