The MSRB administers the Massachusetts State Employees' Retirement System (MSERS) for state employees and certain other employees of public entities. File your Form 5500 series with ease.Access resources and official guidance for plan reporting and compliance. Dynamic name search: Find 5500s even if the plan sponsor's name changed. Use the links on the right of this page to learn more about how to search for unclaimed retirement benefits and steps to take before contacting PBGC. This plan allows eligible employees to: Set aside money towards their retirement. Former employees can perform a secure database search to determine if they may be entitled to any unpaid retirement account money. The 5500 was filled out incorrectly, which delayed its acceptance. Please fill out this field. When can you take money out?