To retire you must meet two requirements: age and service credit . Your minimum retirement age depends on your retirement formula: 50, 52, or 55 .You must submit your application prior to your last day on City payroll with a retirement date being the day after your date of separation. This publication provides instructions for completing the CalPERS. The City of San José is pleased to offer CalPERS "Classic" Members the opportunity to convert their current Tier 2 service into Tier 1 for pension benefits. The following chart outlines the requirements for an immediate annuity under the Federal Employees. Retirement System (FERS). Employment Eligibility: Federal law requires all employees to provide verification of their eligibility to work in this country. Official website of the U.S. Social Security Administration. It is administered through the Office of Personnel Management (OPM).