Where is Homer Barron from? And why does he come to Jefferson in "A Rose for Emily"?

In part III of "A Rose for Emily" we learn for the first time about Homer Barron, Emily's love interest. 

Homer Barron came to Jefferson as the foreman of a Northern construction company.This is the reason why he is dubbed "a Yankee". The epithet "Yankee" is associated to anyone who is originally from any of the U.S. Northern states, or from the area of New England. For more information on the etymology of this...

In part III of "A Rose for Emily" we learn for the first time about Homer Barron, Emily's love interest. 

Homer Barron came to Jefferson as the foreman of a Northern construction company. This is the reason why he is dubbed "a Yankee". The epithet "Yankee" is associated to anyone who is originally from any of the U.S. Northern states, or from the area of New England. For more information on the etymology of this word follow the link included. The story does not specify exactly which Northern state Homer comes from. 

The reason why the construction company was in Jefferson is because the town had a need to pave sidewalks and do work in the streets. The summer after the death of Emily's father, the company who got the contract came to Jefferson and started working in town. 

The construction company came with ni**rs and mules and machinery, and a foreman named Homer Barron, a Yankee--a big, dark, ready man, with a big voice and eyes lighter than his face. [...]. Whenever you heard a lot of laughing anywhere about the square, Homer Barron would be in the center of the group.

Emily had been very sick. She had recently emerged back into society looking quite differently, wearing her hair short, and looking quite youthful. It is during this time period that she meets Homer. As we can infer from Homer's description, he is quite different from Emily. He is brash, loud, and sociable. This does not mean that he is well-liked, as we will find out in the story. However, it is no surprise that a match between he and Emily would have been shocking to the people of Jefferson. 

Presently we began to see him and Miss Emily on Sunday afternoons driving in the yellow-wheeled buggy and the matched team of bays from the livery stable.

A lot of interesting things will occur from this point on. The lives of Emily and Barron, a man from the Northern states, are changed forever from the moment that they meet while he is there as foreman of the construction crew, and this will lead to the shocking, final discovery in the story.