Level 63

Total Experience Required 1,409,509

Level 100 progress: 20.65%

This is roughly the same as:

Killing 2,350 people in Warzone, or...
Killing 2,398 people in Execution, or...
Killing 1,991 people in Wingman, or...
Scoring 503,397 points in Guardian, or...
Scoring 1,532,075 points in Annex, or...
Scoring 927,309 points in Submission.

Horde (TU4)

Completing 3,524 waves on Casual, or...
Completing 2,350 waves on Normal, or...
Completing 1,762 waves on Hardcore, or...
Completing 1,410 waves on Insane.

Or a combination of the above. Have fun!