Ever since, he has enlisted high-ranking executives and engineers from his other businesses, including SpaceX, Tesla and The Boring Company, to help out at the social media company, according to internal records obtained by CNBC and conversations with recent Twitter employees.
Musk has also enabled partners from investment firms who participated in the Twitter buyout access to work within the social media company.
In his testimony, Musk characterized Tesla employees' work for him at Twitter as "just a voluntary thing."
He also said: "This was sort of an after-hours, just if you're interested in evaluating the -- helping me evaluate Twitter engineering, that would be nice.
In addition to Tesla employees, Musk has also enlisted execs and employees from SpaceX, the reusable rocket and satellite internet services company he founded in 2002, to help him at Twitter.