Master Chief Petty Officer, or (MCPO), or Master Chief, is the ninth, and highest enlisted rank and is the highest non-commissioned officer rank in Starfleet. It is higher than the rank of Senior Chief Petty Officer.

Advancement to the rank of Master Chief Petty Officer is similar to that of Chief Petty Officer and Senior Chief Petty Officer. It carries requirements of time served in Starfleet, superior evaluation scores, specialty examinations, and a review of peers. A Senior Chief Petty Officer can advance only if a selection board of serving MCPOs approves, which is the same for Petty Officers First Class advancing to the rank of Chief Petty Officer, and Chief Petty Officers advancing to Senior Chief Petty Officer.

Master Chief Petty Officers are generally considered to be technical experts in their fields. As such they are normally assigned to major fleet commands and fleet staffs. Many MCPOs choose to enter the Command Master Chief Petty Officer Program. If selected they receive additional leadership training and may be assigned to commands as the Command Master Chief (CMC). The Command Master Chief Petty Officer is the senior enlisted person at a command and as such works as a liaison between the Commanding Officer and the enlisted ranks within that command. In this capacity the CMC assists both the Commanding Officer and the Executive Officer in issues of quality of life, discipline, training, and morale. The same applies for a Fleet Master Chief Petty Officer, who acts as a liaison between the fleet's commander and the fleet's noncoms.

Master Chief Petty Officer RanksEdit

	Command-Service	Operations-Service	Sciences-Service
2373

External LinksEdit

• Master chief petty officer article at Memory Alpha, the canon Star Trek wiki.
• Master chief petty officer article at Memory Beta, the non-canon Star Trek wiki.
• Master chief petty officer article at Star Trek Expanded Universe.