Here is a full listing of the current ranks in Battlefield 2142 as well as the global score amount needed to receive them.
Recruit

Global Points Required: 0
Private

Global Points Required: 40
Private 1st Class

Global Points Required: 68
Gunner Silver

Global Points Required: 116
Gunner Gold

Global Points Required: 197
Corporal Silver

Global Points Required: 334
Corporal Gold

Global Points Required: 501
Lance Corporal Silver

Global Points Required: 701
Lance Corporal Gold

GGlobal Points Required: 941
Master Corporal Silver

Global Points Required: 1230
Master Corporal Gold

Global Points Required: 1575
Sergeant Silver

Global Points Required: 1991
Sergeant Gold

Global Points Required: 2489
Master Sergeant Silver

Global Points Required: 3086
Master Sergeant Gold

Global Points Required: 3804
Sergeant Major Silver

Global Points Required: 4664
Sergeant Major Gold

Global Points Required: 5697
Sergeant Major of the Army

Global Points Required: 6937
Chief Petty Officer Silver

Global Points Required: 8404
Chief Petty Officer Gold

Global Points Required: 10165
Warrant Officer Silver

Global Points Required: 12278
Warrant Officer Gold

Global Points Required: 14814
1st Lieutenant Silver

Global Points Required: 17856
1st Lieutenant Gold

Global Points Required: 21507
2nd Lieutenant Silver

Global Points Required: 25734
2nd Lieutenant Gold

Global Points Required: 30594
Captain Silver

Global Points Required: 36183
Captain Gold

Global Points Required: 42610
Major Silver

Global Points Required: 50002
Major Gold

Global Points Required: 58502
Lieutenant Colonel Silver

Global Points Required: 68277
Lieutenant Colonel Gold

Global Points Required: 79159
Colonel Silver

Global Points Required: 92447
Colonel Gold

Global Points Required: 107314
Commissar Silver

Global Points Required: 123411
Commissar Gold

Global Points Required: 141922
Field Commissar Silver

Global Points Required: 163210
Field Commissar Gold

Global Points Required: 187692
Field Marshall Silver

Global Points Required: 202692
Field Marshall Gold

Global Points Required: 217692
Brigadier General

Global Points Required: 232692
Major General

Global Points Required: 0
Lieutenant General

Global Points Required: 0
Supreme Commander

Global Points Required: 40