Mike Flynn is an absolute workaholic. He was the first in and the last out when he was Director, DIA. His only flaw is, he expected everyone else to do the same, and he axed some enterprise management functions that were needed (and still needed). But as an intelligence officer and strategic thinker, he is top notch.
THAT is the very reason DJT chose him. In private industry, people are expected to produce results. DJT will allow no slackers on his team. After all, DJT has a country to save.