I was fired once in my career formerly. However I give pause pondering even when I was transferred or promoted in a sense I was fired. hmmmm . . . Regarding recurring dreams of working I presume you mean with the former work 'fired' from. The answer is I felt regret, however the 'new' work I went to was essentially the same work at a different level and with a different employer. The specifics is it was as a product representative with sales responsibilities, product representation, and as corporate entity representative at the manufacturer level of distribution.
Quite frankly as an analogy my skills and knowledge was like a minor league professional baseball player. I was in the big leagues. I simply did have the qualities needed especially with experience, even though I understood the mechanics of the position easily.
However, at the wholesale level of distribution I was very successful, which the previous experience offered a greater understanding and experience to be equipped for that level. In other words I was a very successful minor league ball player.
I am not sure if that answers your question or not. Regarding dreams working at that position I was fired from today I do not have nightmares as dreams nor do I have dreams as aspirations.