Welcome. MissionSquare Retirement is pleased that the City of Oakland has selected us as the sole provider for your 457(b) Deferred Compensation Plans. FullTime and Permanent Parttime employees can enroll in the 457 Deferred.Future benefits from the 457(b) Plan will reflect the amount of a participant's voluntary salary deferral contributions plus earnings. Vesting is immediate. How do I make contribution changes? WHEREAS, the Port of Oakland sponsors the Deferred Compensation Plan of Port of Oakland.