Several Musk allies have been added to a company directory, with Musk being named CEO internally.
Elon Musk put Twitter employees to the test this weekend to see who is capable, and willing, of surviving under his new reign.
Musk has a 16 year old son, Saxon James Musk, whom he frequently mentions on Twitter, although the Twitter workers have yet to see any confirmation that James Musk is of any relation to their new owner.
"This is it," one of the people familiar said, describing the feeling at the company under Musk.
Many engineers were tasked over the weekend with "sprints," set periods of time for coding work to be done.