Lieutenant, Junior Grade Affiliation UNSC Navy Higher Rank Lieutenant Lower Rank Ensign Known Lieutenant, Junior Grades Bill Streeter David Brightling Fred-104 Jacob Keyes Kurt Ambrose Rai Li William Lovell Commonwealth Weapons Officer Preston Cole James Gregory Cutter
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Lieutenant, Junior Grade is a junior commissioned officer rank of the UNSC Navy, equal in rank to First Lieutenant in the UNSC Marine Corps, UNSC Air Force, and UNSC Army.

Style of address

• Lieutenants, Junior Grade are referred to as "Lieutenant" in informal settings.
• Lieutenant, Junior Grade can be abbreviated as or "LTJG".

Trivia

• Preston Cole was likely a Lieutenant, Junior Grade when he was aboard the UNSC Las Vegas during the Callisto Incident. Though he is referred to as a "Second Lieutenant," that is not a Navy rank, therefore he was most likely a Lieutenant, Junior Grade, or the Navy equivalent to 2nd Lieutenant, Ensign.
• Jacob Keyes held this rank when he first traveled with Catherine Elizabeth Halsey on the shuttle, Han, to seek out potential SPARTAN-II candidates.
• James Gregory Cutter also held this rank while on the UNSC Brilliant Shores, and as well as on the UNSC Final Summit.