MMC Benefits Handbook
Breaks in Service
If you terminate employment and are rehired, your prior vesting service will be restored to you.
As noted above, if you terminate from Marsh & McLennan Companies employment and are rehired as a Marsh & McLennan Companies employee within 12 months, you will receive vesting service credit for your period of absence.
If you are absent for military service or other uniformed service covered by the Uniformed Services Employment and Reemployment Rights Act (USERRA), and you return to work within the period required by USERRA, then your period of absence for such military service will be counted as vesting service for all purposes under the Plan. If you are on an approved leave of absence (other than for military service or disability) that is more than 12 months in duration, you will not be credited with vesting service after the first 12 months of the leave.