Welcome. MissionSquare Retirement is pleased that the City of Oakland has selected us as the sole provider for your 457(b) Deferred Compensation Plans. Use VA Form 210781 if you've been diagnosed with a mental health condition related to a traumatic event during your military service.FullTime and Permanent Parttime employees can enroll in the 457 Deferred. Many of these disabilities involve some form of Post-Traumatic Stress Disorder (PTSD).