The Oath

I, [name], do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I take this obligation freely, without any mental reservation or purpose of evasion; and that I will well and faithfully discharge the duties of the office on which I am about to enter. So help me God.

5 U.S.C. §3331

The Oath all Federal Employees must swear when taking a Federal position (Paid or Unpaid). The same oath is sworn by uniformed personnel as well.

Nowhere does the Oath to uphold the President, Congress or the Executive Branch .

At what point does an individual decide that, they are in violation of the Constitution.?

AND if so what should the course of action be?

Just following orders hasn't been a valid defense since 1945 (Nuremberg).