1 Kings 11:27–28 informs us that Jeroboam became a servant of Solomon because of his skill in organizing those who laboured in building projects, particularly the project that closed up the breaches in the wall of the city of David
in Jerusalem. Jeroboam was promoted to have authority over all the forced labour. There the story might have ended, and Jeroboam‘s name might have been lost in relative obscurity had not the Lord, through one of his prophets, intervened.
27 And this was the reason why he lifted up his hand against the king. Solomon built the Millo, and closed up the breach of the city of David his father.