Final* description of Earth Force Ranking System

Simply, I am assuming that the left hand list represents the actual commissioned ranks with any equivalent ranks or titles in the right hand list.
Being:
Joint Chiefs of Staff=General

Admiral=General
Vice-Admiral=Lieutenant-General
Rear-Admiral (upper)=Major-General
Rear-Admiral (lower)=Colonel

Lieutenant-Colonel=Group Captain
Sector Captain=Commander
Major=Lieutenant-Commander
Lieutenant**=Wing Commander**
2nd Lieutenant=Squadron Leader

*[probably, but check my other blog via my profile for further details/analyses]
**Galus is named both Lieutenant and Commander, if not actually a Lieutenant-Commander I would suggest his position in the chain of command is as a Lieutenant with his rank as a senior Starfury pilot as Wing Commander.However, in real-world military structures this is a much higher rank equivalent to Commander or Lieutenant-Colonel.