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Memory Beta, non-canon Star Trek Wiki
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Memory Beta, non-canon Star Trek Wiki

Master chief petty officer (MCPO) is an enlisted rank in Starfleet, above a senior chief petty officer. It is the highest enlisted rank in Starfleet.

Command division MCPO embroidery, circa 2260s.

In the 2260s, a Starfleet master chief would wear an embroidered uniform rank insignia of an enclosed chief's chevron insignia with three stripes beneath it, below the assignment patch on certain Starfleet uniforms. (FASA RPG module: Cadet's Orientation Sourcebook)

While the FASA RPG manual showed a variety of enlisted insignia, none were ever used in a canon or licensed TOS-era production or publication.

By the 2280s, a master chief wore an insignia pin in normal unform wear, a silver ring with an enlarged upper segment and a gold diamond within. A lower grade, MCPO second class, had a similar insignia, of the ring and diamond without the upper segment. (ST reference: The Star Trek Encyclopedia)

Positions and lists[]

Federation Starfleet[]

Operations division[]

Janice Rand
engineering 
Mike Ilucci
security 
Razka

Chronology[]

Dates listed are first appearance or mention at that rank except as noted. Personnel are Starfleet except as noted.

2379[]

Connections[]

Enlisted ranks Commissioned ranks Flag ranks
Earth SF CREW PO2

PO1

CPO

SCPO


MCPO

ENS LT CMDR CAPT

FCAPT


VICE CDORE

CDORE RADM / 2ADM VADM / 3ADM 4ADM FADM / 5ADM

GADM

Starfleet & SFMC ENS JG

ENS


ENS 1C

LT JG LT LT CMDR CDR CDORE

1ADM

PVT CPL SGT

MASTER SGT

SUBLT

2ND LT

1ST LT CAPT MAJOR LT COL COL BRIG GEN
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