I, Teh Weatherdude, do solemnly swear 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.
Yes, it's the same oath as the President's. Every level, military or civil service, takes the same oath. It's in the Constitution.
It wasn't the first time he swore this oath. I think the first time was his commissioning in 1980. He swore it again when he entered civil service 7 years ago. I suspect it won't be the last time. Thus far, he's spent 24 years supporting and defending the Constitution and that role has been part of my life as well.
Defender of the Constitution and the occasional chicken. Mom-cat to kittenz.
(the mustache is gone now.)