pcocp,
assuming you have a standard, normal, public service pension plan.
What you have is a Defined Benefit final-salary occupational pension, also known as superannuation in the public service.
You pay a % of salary for the pension. For each year paid, you get 1/80 of your final salary as a pension. The max is 40 years contributions, i.e. 40/80 or 1/2 of final salary as a pension.
You also get a lump-sum of 3/80 of salary per year paid in. The max here is 120/80 or 1.5 times salary as lump-sum.
The pension should increase as the wage of your grade increases. This is a very valuable benefit.
There is no risk to you in this pension. It's underwritten by the State, i.e. the taxpayers, at big cost to them.
As long as you have, or will have, 40 years paid in, then no need for any other pension.