Sophia,
Past experiences of employment are common because of the impact they had and to dream of them would represent the aspects/fears related to those jobs. If you will take these jobs and apply them as aspects of your inner emotions I suspect there will be an understanding of their possible application as well as impact in your life. The first job you mention, the one that seemed larger than it was, probably means it had a more recent if not more significant impact on you. Together {the interior merging} with the previous job of 3 years the jobs left an identifiable impression on your psyche. Lots of emotions and responsibilities related to the employment {lots of offices & people}. Having the feeling you were not supposed to be there most likely means you didn't want to be there while you were and would not want to go back. Saying hi and goodbye would be a brief remembrance of the past and the environment you were in.

The two bosses, one male and one female probably represent your 'yin and yang', controlling masculine and feminine aspects. The superior aspect is the feminine which in many instances in dreams represents higher emotional stress. 'She' knew about the 'prior incident' because she is a part of you and not the real person you knew. The male boss is in a submissive position which may not only suggest your true feelings toward him but how your masculine self functioned them {if not still}. The higher feminine position may also suggest personality traits. Do you feel confident about yourself but not to an extent you are able to present this attitude in the outer world ? The context of dream, revisiting the past employment experiences, may be about this aspect of who you are. Self confident on the inside but not so much on the outside. Being able to shut down this aspect may suggest when you get to the point of needing to be more forceful in particular situations you may lack the ability to do so.

The next paragraph seems to point to different aspects about yourself where parts work well together but a third feels insignificant. This could be related to the personality traits I mentioned above. The inner self is unsupervised which means your true self has parts that feel out of place in the outer world.

The new group of workers may represent new aspects you now experience or more likely wish to experience, you wish to be different from your past. You need to be able to explore your inner self so to present a stronger outer self. The futuristic building is your whole self, your 'structured' self as you wish it to be {this would fit with Freud's 'wish fulfillment' aspect of dreams}. These impressions are 'futuristic', or desired, but with the knowledge related to your actual personality {lacking the ability to be as dominant in your outer personality}. Being undressed in front of the two men would mean you need to expose this inner self to the outer world {the male co-workers are again aspects of your inner being}. The desire to be the stronger person on the outside would take you to new places, unexplored previously {England, France, Egypt, Italy}. But as much as you wish to expose these feelings you still tend to cover them up, keep them hidden.

The different countries you mention may have deeper possible applications, perhaps related to recent experiences in your life related to them. China is in the orient a place more attuned to different value system than in the West, the people are more introspective. Egypt is often thought of for its ancient ruins. Choosing Egypt may be about your past, those 'ancient experiences' that are the foundations of who you are today as a person. In choosing this path {an inner journey, psychological} you encounter sandstorms which would represent emotional conflicts. Deserts are barren places and in dreams would represent barren aspects within yourself. The door that leads to a different location, one you are not familiar with, is the one that leads to the 'hideous monster' within your experiences in life. You have to be the adventurous type to take this route. Letting in the monster into the bar would be letting this 'negative' aspect into your conscious memory. You would have a fight on your hands if you were to do so but not being afraid in the dream is what needs to be your attitude in real life.

Summary
My impressions of the dream is it is addressing traits of personality that have its roots in earlier life. Although the parts about past jobs do relate in some aspects to those experiences, they too are pointing to 'past work' from your earliest beginnings {Egypt}. There are dominant feminine aspects {emotions} that overrule positive masculine qualities of your personality. The jobs point not only to real experiences and feelings about them but also your inner self and those aspects.

The second paragraph depicts a change, possibly reflecting recent experiences where you begin to view things a bit different. The looking back to the past leads you to look forward to the future {psychologically}. Something has changed that is more harmonious to letting you look to opening up to the deeper aspects of your inner being. But there is still a reluctance to completely open up to parts of yourself.

The reluctance would be related to the door where the monster resides. I sense this monster {monsters are negative emotional experiences in your life from the past} is not a overly traumatic experience but one that did influence your life to the point it now defines who you are. What happened in the past 'is a complete blur'. Opening up to what that experiences/influences were is what I believe is the primary intent of the dream.

Has anything changed recently that has led you to reflect on the past? When someone posts a dream for interpretation it is often due to a recent experience that causes them to do so. Something beyond the norm.


Jerry