Chief Petty Officer
|Chief Petty Officer|
|Higher Rank:||Senior Chief Petty Officer|
|Lower Rank:||Petty Officer First Class|
|Known Chief Petty Officer||Known Chief Petty Officers|
|[ Source ]|
Chief Petty Officer (Abbreviated to CPO and referred to as Chief) is a senior non-commissioned rank used by Starfleet. Chief Petty Officers serve in leadership roles in their respective departments (Gunner's Mate or Shuttlebay Manager, for example), and may also serve in any junior officer post. They generally have many years of service and a wealth of experience in their selected field. A promotion to Senior Chief Petty Officer after five years is common, but not required.
Unlike Petty Officer First Class and lower ranks, advancement to Chief Petty Officer not only carries requirements of time in service, superior evaluation scores, and specialty examinations, but also carries an added requirement of peer review. A Petty Officer can only advance after review by a selection board of serving (Senior and Master) Chief Petty Officers, in effect "choosing their own."
Chief Petty Officers serve a dual role as both technical experts and as leaders, with the emphasis being more on leadership as they progress through the CPO ranks. A recognized, collateral duty for all Chiefs is the training of Junior Officers.