An agency must request VERA and receive approval from the Office of Personnel Management (OPM) before the agency may offer early retirement to its employees. CSRS employees with fewer years of service have a minimum retirement age of 62.There are some exceptions to this rule, however. Early Age Retirement. The essential form for an immediate retirement application is Standard Form (SF) 3107. As a federal employee, early retirement may be available depending on your age and years of service. Do I have to decide at the time I enroll in the DROP how long I will participate and keep working for the Fire Department? Amounts determined in a statutory Risk. 1. Contact TRS to verify TRS retirement eligibility, then (if eligible) request your retirement packet.