Executive officer

The executive officer (or XO) is a billet position in the armed forces. They are considered command positions, and is always the officer that is junior to the commanding officer.

Executive officers exist at every level of organization from the platoon onward.

Known executive officers

 * First Lieutenant Melissa McKay, ODST division on the
 * Commander Richard Lash,
 * Lieutenant Commander Julian Waters, (acting)
 * Armstrong,