Newt was the speaker of the house of representatives, 2 people away from being president. That is an extraordinary management job, it was in a time of budget crisis, he solved the crisis, and it resulted in the only balanced budget of your lifetime.
Additionally, as Gingrich mentioned in at least one debate, he is a small business owner of at least 4 profitable small businesses, past and present, all of which employed people.
Not to mention he is the only candidate who can “manage” the media - and not pander.