Level 9

Total Experience Required 11,434

Level 100 progress: 0.17%

This is roughly the same as:

Killing 20 people in Warzone, or...
Killing 20 people in Execution, or...
Killing 17 people in Wingman, or...
Scoring 4,084 points in Guardian, or...
Scoring 12,429 points in Annex, or...
Scoring 7,523 points in Submission.

Horde (TU4)

Completing 29 waves on Casual, or...
Completing 20 waves on Normal, or...
Completing 15 waves on Hardcore, or...
Completing 12 waves on Insane.

Or a combination of the above. Have fun!