Contact Us
Middlesex County Retirement System
25 Linnell Circle
P.O. Box 160
Billerica, MA 01865
Hours of Operation: 9:00am- 5:00pm Monday-Friday
Phone: (978) 439-3000 or (800) 258-3805
Fax: (978) 439-3050
Email: mrs@middlesexretirement.org
Staff Listing: Board and Staff Members
Member Unit Listing: Member Unit Listing