Lieutenant commander

Lieutenant Commander is a junior commissioned officer rank of the UNSC Navy, equal to the rank of Major in the UNSC Marine Corps.

A Lieutenant Commander is a senior department officer on a large ship or installation. They may also be Commanding Officer (CO) or Executive Officer (XO) (second-in-command) of a smaller ship or installation.

So far, Lieutenant Commander is the highest rank held by a Spartan-II.

Known Lieutenant Commanders

 * Lieutenant Commander SPARTAN-084 "Fhajad"
 * Lieutenant Commander SPARTAN-051 "Kurt" (AKA Lieutenant Commander Kurt Ambrose)
 * Lieutenant Commander Gail Purdy
 * Lieutenant Commander J. G. Ortega
 * Lieutenant Commander Julian Waters
 * Lieutenant Commander Xaing Cho