You are given a separate rank for the different modes. As you earn rank points (RP), your rank will increase.
Ranks are broken down as follows: Trainee Lv. 1-5, Basic Trooper Lv. 1-5, Elite Trooper Lv. 1-5, Premier Trooper, Lv.1-5, SOLDIER: 3rd Class Lv. 1-3, SOLDIER: 2nd Class Lv. 1-2, and SOLDIER: 1st Class. A select number of players who reach the top of SOLDIER: 1st Class will be placed in a special elite class of their own.
The rank that you hold at the end of a season will be the rank you are awarded for that season, and it will also be used to determine the rank that you start at the following season.