Level 30

Total Experience Required 131,771

Level 100 progress: 1.93%

This is roughly the same as:

Killing 220 people in Warzone, or...
Killing 225 people in Execution, or...
Killing 187 people in Wingman, or...
Scoring 47,062 points in Guardian, or...
Scoring 143,230 points in Annex, or...
Scoring 86,692 points in Submission.

Horde (TU4)

Completing 330 waves on Casual, or...
Completing 220 waves on Normal, or...
Completing 165 waves on Hardcore, or...
Completing 132 waves on Insane.

Or a combination of the above. Have fun!