FERS — Federal Employees Retirement System — is the follow-on program to the CSRS. FERS is a composite of three different retirement programs, a Defined Benefit (traditional pensions) portion, a 401K-like program of employee and employer contributions known as the TSP — Thrist Savings Plan — and ordnary Social Security Administration benefits. To find more information about FERS you can use the “Category” selection, type in a search in the search box just below th emain menu, or look at the FERS highlights we provide below.