Matlack is a community fundraiser, volunteer and philanthropist in nonprofits benefiting children. She has been an active member of Perkins Corporation since 2010 and has served on the Perkins Possibilities Gala Committee since 2009. Matlack is a Board member of the Boys & Girls Clubs of Boston. She has been involved with Massachusetts General Hospital for Children since 2004 as a member of the Advisory Board and annually co-chairs the Breast Cancer Research Foundation’s Symposium in Boston.