Commander (United States)
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In some U.S. military and government organizations, commander is an officer pay grade that is also sometimes used as a military billet title—the designation of someone who manages living quarters or a
U.S. Navy commander Ann Claire Phillips, first commanding officer of USS Mustin, in 2003
Lieutenant commander is considered a mid-grade officer rank in the United States Navy, the United States Coast Guard, the United States Public Health Service Commissioned Corps, and the National Ocean
Commander (United States)
…and the Public Health Service Corps, commander (abbreviated "CDR") is a senior-grade officer rank, with the pay grade of O-5. Commander ranks above lieutenant commander (O-4) and below captain (O-6). Commander is equivalent to the rank of lieutenant colonel in the other uniformed services. The United States Maritime…
A lieutenant commander providing medical care aboard USNS Comfort (T-AH 20); note golden oak leaf insignia.
Lieutenant commander James L. Garard wearing the standard combination cover (without embellishments or "scrambled eggs") as per regulations.