Senior Chief Petty Officer
Senior chief petty officer (SCPO) was an enlisted naval rate, a type of military rank used by the service organizations of different cultures. As a traditional naval grade, SCPO was senior to a Chief Petty Officer, and was almost the highest enlisted grade in organizations like Star Fleet and the US Navy, falling subordinate to any commissioned officer. In comparison to infantry ranking systems, this rank was approximately equivalent to the "first sergeant" grade.
When there are individual grades of chief petty officers, SCPO was subordinate to Master Chief Petty Officer (MCPO).
This rank was considered to have the responsibility of a "noncommissioned officer." Personnel of this grade could be addressed simply as chief (or more properly, "senior chief"), and sometimes by their job title.
| Star Fleet Positions | ||
|---|---|---|
| Crew Positions | Tactical Officer • Engineering Officer • Security Officer • Medical Officer • Science Officer |  
|
| Officer Positions | Chief Tactical Officer • Chief Engineer • Chief of Security • Chief Medical Officer • Chief Science Officer • First Officer • Commanding Officer | |
| Flag Positions | Group Commander • Division Commander • Commander in Chief | |
| Academy Positions | Academy Instructor • Admissions Officer • Testing Officer • Evaluations Officer • Commandant (Academy) • Superintendent (Academy) | |
| Other Positions | Game Moderator • Game Moderator Administrator • Inspector General • Creative Director • Content Manager • President | |
| Trainees | Enlisted Personnel | Non-Commissioned Officers | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rct | CMR | CMA | CM | PO3 | PO2 | PO1 | CPO | SCPO | MCPO | CMCPO | MCPOSF | ||
| Trainees | Commissioned Officers | Flag Officers | |||||||||||
| Cdt | Mid | Ens | Lt[JG] | Lt | LCdr | Cdr | Capt FCapt |
Cmdr | RAdm | VAdm | Adm | FAdm | |
