To dream that you are fired from your job. indicates that you are wanting to end some relationship or situation in your waking life. It also suggests that you are repressing what you really desire most.
Dreaming that someone is fired from a job can represent:
A phase being ended in your life (in a way that's out of your control)
Abandonment
Feeling that someone is failing to support an agreement with you
Fear of a particular change in your life, especially one that is out of your control
The idea of being fired from your actual job is on your mind right now