For added flavour (and to ensure Star Treky terms are minimised) I have worked out the following ranks for command staff in the pc's dynasty in my campaign, 'the House of Rakespur' -
Gilded Widow Command-Courtiers - 'The Rakespur Court'
Lord Rakespur - (The Rogue Trader) - The pc is ex-Imperial Guard so is no good at ship command)
Seneschal of the House of Rakespur - (Lady of Ceremonies, Chief Record Keeper of the House, House Historian etc)
Shipmaster of the Gilded Widow - (Commander of the Rakespur Flotilla Flagship)
Lord's Equerry - (Lord Rakespur's personal aide and diplomatic envoy)
Virtuoso of the Two Orchestras - (House Spymaster, Head of Assassins, Intriguer, Sabotagist, Counter-mutineer, etc - Heads up the Orchestrati and the Orchestra Occult) -
Adeptus Mechanicus Peripatech-Envoy to the House of Rakespur
Astropath Transcendent to the House of Rakespur
Navigator
Arch Militant of the House of Rakespur
- (House Military Commander)
Vigil Senioris of the House of Rakespur - (House Head of Security)
Missionary Chaplain of the Rakespur Flotilla
- (Ecclesiarchal Representative to the House)
Annunciator Absolute of the
Gilded Widow
- (House Herald, Cryptologist, Linguist, and messenger)
Coxswain Maximus of the
Gilded Widow
- (Chief of the Helm)
Provostus Panoptica of the Gilded Widow - (Chief of Sensors)
Ordinatus Senioris of the Gilded Widow - (Chief Gunner)
Procurator Potentate of the House Treasury - (House Treasurer)