To dream that you are looking for a job suggests that you are feeling unfulfilled and frustrated in a current phase of your life. If you are applying for several jobs in your dream, then it suggests that you need a clear direction and focused goal.
To dream about your current job suggests that you need to work harder or be more effective at work. There may be something or some task that must be done at once. Or the dream may mean you are overworked or preoccupied with work. You need to make time for leisure and relaxation. If you dream that you are still working at your old job, then it suggests that there is an old lesson that you need to learn and apply to a current situation. It may also mean that you are regressing into your comfort zone.
To dream that you lose your job represents instability and insecurity in your waking life.
Dreaming that you take someone else’s job or that you replaced someone else’s position means that if you want the job done right, you have to do it yourself.