Contact Us
| Physical Address: | Mailing Address: |
| Middlesex County Retirement System | Middlesex County Retirement System |
| 25 Linnell Circle | P.O. Box 160 |
| Billerica, MA 01865 | Nutting Lake, 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