A pension has both negative and positive aspects. When you work for the government, you may not have much choice in the type of retirement plan you are offered. It is important to understand the specific details related to your plan.
Most employers will offer an annual training workshop on the plan or go over the specifics of the plan during orientation. If you are unsure of the type of plan that you are getting, and whether or not the plan is funded (money being set aside to pay you benefits later) or unfunded (no money being set aside for future benefits), talk to a human resource representative.