There were a few Spartans that were discharged for various reasons from the Spartan program. These, through their work primarily in ONI, achieved higher ranks than the "operational" spartans. Examples: Rear Admiral Serin Osman (Serin-019) and Lieutenant Commander Fhajad-084. Additionally, Colonel Randall Aiken (Randall-037) went missing and became stranded during an operation and ended up joining the colonial guard, rising through the ranks as a discharged Spartan.
There were a number of "full Spartans" that made it all the way through the initial Spartan-II program, including surviving augmentation.
- Lieutenant Commander:
- Lieutenant, Junior Grade:
- Chief Warrant Officer:
- Master Chief Petty Officer:
- Chief Petty Officer:
- Petty Officer 2nd Class:
- James-005, Jai-006, Li-008, Joshua-029, Vinh-030, Samuel-034, Isaac-039, Douglas-042, William-043, Anton-044, Linda-058, Malcolm-059, Kelley-087, Jerome-092, Grace-093, Alice-130, Sheila
- Rank Unknown:
- Naomi-010, Keiichi-047, Maria-062 (retired), Solomon-069, Arthur-079, Victor-101, Adriana-111, Joseph-122, Carris-137, Cal-141, Mike, Beta-Red-Actual, Black-Two, Black-Three, Red-Fifteen, Unnamed Spartan
In today's military, especially in the world of special operations, battlefield command is held by a junior grade officer (an Ensign, Lieutenant (Junior Grade), or Lieutenant), or by an NCO. The need for technical expertise throughout the small squads operators complete their missions in mandate that all members be proficient in the operational skillsets. As such, officers, who generally put an emphasis on leadership throughout their training, are often not skilled enough to prevent the team from being weighed down by them, especially as they reach the higher ranks. In addition, higher-ranked officers are often too valuable from a strategic standpoint to risk in front-line combat.
The fact that the Spartans were so skilled in such a wide variety of areas enabled them to command tremendous respect, both from their legends and from those who saw what they were capable of. As such, they mostly remained enlisted personnel. A few were promoted to higher enlisted ranks (like John-117), but for the most part, the Spartan-IIs seemed to stay at Petty Officer 2nd Class.
There was a marked change with the Spartan-III program. Kurt-051, the Spartan-II in charge of the training for the Spartan-IIIs, was given an officer rank so as to make the chain of command clear. When he was no longer able to supervise the remaining forces under his command, he promoted Fred-104 to the rank of LTJG to set up a clear head. As for those in the Spartan-III program, they seemed to hold markedly higher ranks. The members of Noble Team: Commander Carter-A259, Lieutenant Commander Catherine-B320, Warrant Officer Emile-A239, and Noble Six, a Lieutenant. Jorge-052, a Spartan-II was granted his Warrant Officer rank due to his membership in Noble Team.
The article on Noble Team gives this reasoning for their higher ranks:
Noble Team also operated with non-Spartan military personnel more extensively than other Spartan teams. To grant them more operational freedom when interacting with military personnel, the members of Noble Team had been given higher ranks than most Spartans by their CO.
And that may be why the Spartan-IIs were not given higher ranks - simply, because since they were used as secretive commandos, they operated outside the normal chain of command and did not need the more formalized rank structure.