There are the Obama appointees who can be terminated immediately.
But then there are those hired to fill DOD career openings and Obama appointees hired them. They are in the woodwork like termites and difficult to fire. These pose the most dangerous danger to the nation.
Run background checks on them , security check don’t you know
Even an SES will quickly be powerless if he suddenly finds himself with the budget of his fiefdom zeroed out.
Headless nails.
What I would do is in each department is have my people punch a few computer keys and make lists of anyone who had been hired in the last eight years.
Then I'd get me a few mean interviewers and start calling them in on the carpet about fifty a day and give them a screening they would not believe.
You got to get them out of their secure mode.
They would be to busy looking over their shoulder to play gotcha!