Final answer:
The two main characters in the story are secretaries; Margot works with Admiral Mark Kerr and Juliet with Colonel Williams in Military Railways.
Step-by-step explanation:
The occupation of the two main characters in the story you're referring to are both secretaries. Margot works with Admiral Mark Kerr who is on the Air Board, while Juliet works with Colonel Williams in Military Railways. This detail informs us about the social context and the environment in which these characters operate, linking to larger themes in narrative such as status, gender roles, and historical circumstances of the time they are set in.
Since literature often uses characterization to drive a narrative, understanding the occupation of characters can provide insights into their social interactions, challenges they face, and can underline themes related to their personal development within a given story.