Joe Lonsdale, a tech investor close to Mr. Musk, is not planning to play a formal role in the Trump transition, according to a person briefed on the matter, and he has said publicly that he does not want to join the administration “full time” but would rather play a part-time advisory role.

Sources said that Musk’s near-constant presence at Mar-a-Lago in the week since Election Day had begun to wear on people who’ve been in Trump’s inner circle

Elon Musk, the world’s richest person, will be taking on an official role to try to help President-elect Donald Trump make government more efficient. It will add yet another responsibility to an ever-growing to-do list for the increasingly distracted CEO and business leader.