Contact Information

Local Office:
Mass Mutual Retirement Services
1255 Treat Boulevard, Suite 300
Walnut Creek, CA  94597
Toll Free:  (888) 435-9670
Direct:  (860) 835-8092
Fax:  (925) 977-9098

Kerry Avilla, Retirement Education Specialist (866) 617-7901
Appointments, enrollment, investments, pre retirement catch up, rollovers

Helen Lai, Relationship Management Specialist (888) 435-9670
Note that withdrawals and rollovers will no longer come to Walnut Creek Office.  Participants will call the Participant Information Center (PIC) 800-743-5274 for the Retirement Services Group.

Account Access
Participant Information Center
Login to Website
More information on account access for

Loan Repayment Transmittals
Submit Transmittal Form along with your bank check or money order payable to SSB&T as Trustee for Contra Costa County Deferred Compensation Plan.  PERSONAL CHECKS WILL NOT BE ACCEPTED.

Mail Transmittal form with your check(s) to:
MassMutual Retirement Services
P. O. Box 219062
Kansas City, MO  64121-9062
For overnight mail:
MassMutual Retirement Services
430 W 7th Street
Kansas City, MO  64105