These are the ranks for both Marines and Starfleet, and they often work closely together.
The first will be Starfleet, the second Marines.
Enlisted:
Crewman/Private
Specialist/Private First Class
Junior Petty Officer/Lance Corporal
Non-Commissioned Officers (NCOs):
Second Class Petty Officer/Corporal
First Class Petty Officer/Sergeant
Chief Petty Officer/Staff Sergeant
Master Chief Petty Officer/Spartan
Commissioned Officers:
Ensign/Second Lieutenant
Lieutenant, Junior Grade/First Lieutenant
Lieutenant/Captain
Lieutenant Commander/Major
Commander/Lieutenant Colonel
Captain/Colonel
Flag:
Rear Admiral/Colonel of the Admiralty
Vice Admiral/Brigadier General
Admiral/Major General
Executive Admiral/Lieutenant General
Fleet Admiral/General
