Q:  I am a GS-09 seeking a promotion go a GS-11 position. How can I be sure that I will get a promotion?  I already fill in for GS-11 employees when they are out sick or use leave. I believe I already have some of the experience and qualifications needed for a promotion. A:  Gaining the experience you have by filling in for higher-graded employees is an excellent source of experience, and hopefully an indicator that you will be promoted in the future. However, there is no way to be sure that you will get a promotion. There must first…