Level 95

Total Experience Required 5,849,894

Level 100 progress: 85.7%

This is roughly the same as:

Killing 9,750 people in Warzone, or...
Killing 9,949 people in Execution, or...
Killing 8,263 people in Wingman, or...
Scoring 2,089,248 points in Guardian, or...
Scoring 6,358,581 points in Annex, or...
Scoring 3,848,615 points in Submission.

Horde (TU4)

Completing 14,625 waves on Casual, or...
Completing 9,750 waves on Normal, or...
Completing 7,313 waves on Hardcore, or...
Completing 5,850 waves on Insane.

Or a combination of the above. Have fun!