Level 35

Total Experience Required 202,711

Level 100 progress: 2.97%

This is roughly the same as:

Killing 338 people in Warzone, or...
Killing 345 people in Execution, or...
Killing 287 people in Wingman, or...
Scoring 72,397 points in Guardian, or...
Scoring 220,339 points in Annex, or...
Scoring 133,363 points in Submission.

Horde (TU4)

Completing 507 waves on Casual, or...
Completing 338 waves on Normal, or...
Completing 254 waves on Hardcore, or...
Completing 203 waves on Insane.

Or a combination of the above. Have fun!