Level 41

Total Experience Required 326,650

Level 100 progress: 4.79%

This is roughly the same as:

Killing 545 people in Warzone, or...
Killing 556 people in Execution, or...
Killing 462 people in Wingman, or...
Scoring 116,661 points in Guardian, or...
Scoring 355,055 points in Annex, or...
Scoring 214,902 points in Submission.

Horde (TU4)

Completing 817 waves on Casual, or...
Completing 545 waves on Normal, or...
Completing 409 waves on Hardcore, or...
Completing 327 waves on Insane.

Or a combination of the above. Have fun!