Executive officer
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The Executive Officer (more commonly known as the XO) is the second in command aboard a Colonial Fleet vessel and is responsible for all operations. The rank normally held by the CO is Major or Colonel.
Executive Officer, battlestar Galactica
- Colonel Saul Tigh (Miniseries to "Lay Down Your Burdens, Part II")
- Lieutenant Karl Agathon ("Lay Down Your Burdens, Part II" to "Exodus, Part II")
- Colonel Saul Tigh (Resumes his position as of "Collaborators")
Executive Officer, battlestar Pegasus
- Colonel Jack Fisk ("Pegasus" to "Resurrection Ship, Part II")
- Colonel Fisk's Commander Barry Garner's XOs are unknown
- Lieutenant Anastasia Dualla ("Lay Down Your Burdens, Part II" to "Exodus, Part II")
Note
Executive Officer is a military term in this context, used in several branches of the armed forces worldwide (naval, marine, air force). Certain forces, such as the British Army use the term "2i/c" (signifying second in command) or "First Officer" in preference to "XO."