Vesting is the conveying to an employee the right to receive a retirement benefit upon reaching age and service requirements.

Generally, you are vested after obtaining five (5) years of service credit. However, if you withdraw your accumulated retirement contributions when you terminate employment, you will have forfeited all future rights to retirement, survivor, and disability benefits. There is no partial vesting in the retirement system.
For information on how you may protect your vested retirement benefits if you terminate employment before you are eligible to retire, review the section titled “Termination of Membership/Withdrawal of Contributions” found in the Retirement Booklet.