The mission of Cooperative Elder Services, Inc. is to empower seniors and adults with medical or cognitive challenges to age-in-place by serving their health and socialization needs and providing support for families. The mission of Cooperative Elder Services, Inc. is to empower seniors and adults with medical or cognitive challenges to age-in-place by serving their health and socialization needs and providing support for families. CESI accomplishes our mission at a cost that remains accessible for low-income community members; CESI's programs are among the most affordable options for long-term senior care in Massachusetts, with a day at one of CESI's centers costing half as much as a day of home health aide services or daily fees for an assisted living facility ($68 compared to $150 and $173, respectively).