No. The president is not a judge of any kind.
president
Was Calvin Coolidge
Chief Justice of the Supreme Court John Roberts
The Chief Justice of the Supreme Court administer the oath of office to the President. Earl Warren was Chief Justice when Ford became president.
Yes. The Constitution states the exact wording to be used in the oath but does not specify that it must be done by the Chief Justice. Anyone authorized by law to administer an oath within the jurisdiction in which the oath is taken may administer the oath to the President. When Lyndon Johnson was sworn in after the Kennedy assasination the oath was administered by a justice of the peace aboard Air Force One.
The Oath of Office - Vice President-elect Jo Biden, Jr.administered by Associate Justice of the Supreme Court, John Paul Stevens
who has authority to administer oath on DA Form 2813
While the Constitution mandates the Oath itself, it does not specify who should administer it. Typically, the Chief Justice of the U. S. Supreme Court is chosen, however other judges have also been selected.
Whomever the Senate has designated as the President Pro Tempore.
president
The President promises to protect the natural (and governed) rights of the people when he takes the oath of office.
Chief Justice John Roberts gave the oath to President Barack Obama.