Established in 1949, Big Brothers Big Sisters of Massachusetts Bay's (BBBSMB) mission is to promote the healthy development of children through the nurturing of continuing, one-to-one friendships with caring, responsible adults, supported by trained professional staff. As one of the largest adult-to-child mentoring organizations in the nation, BBBSMB currently serves over 3,500 youth in one-to-one relationships, and more than 100 additional youth in group activities and camperships. Our service area encompasses 155 cities and towns throughout the Massachusetts Bay area.