In the spirit of Star Trek we will be using the command ranks, specfically those of the 24th century. These are most commonly seen in the modern series of TNG, DS9, and Voyager. I personally prefer the clear solid circles of the Commanding Officers, but even the settle lines for the Non-Commissioned Officers are still distinct. Earlier erras utilized more military like badges. Even some of the future episodes such as All Good Things in TNG made the circle blips even more pronounced.

This universe that we create will keep in line with the different categories of personnel. We will have the Commissioned Officers, also known as Line Officers, and then the Non-Commissioned Officers (NCO), also known as the Enlisted personnel. As you may have figured out generally any of the Commissioned Officers will be considered above the NCOs, due the additional training they have in both universes. There is a minor overlap because experience may allow it.

Commissioned OfficersNon-Commissioned Officers (NCOs)
Fleet Admiral
Vice Admiral
Rear Admiral
Lt. Commander
Master Chief Petty Officer
Lt. Junior Grade
Senior Chief Petty Officer
Chief Petty Officer
Ensign Junior Grade
Petty Officer 1st Class
Cadet 4th year
Petty Officer 2nd Class
Cadet 3rd year
Petty Officer 3rd Class
Cadet 2nd year
Crewman 1st Class
Cadet 1st year
Crewman 2nd Class
Crewman 3rd Class