An attitude of cynicism has 'infiltrated' the staff. [=the staff has become cynical]
Attempts to 'infiltrate' undercover agents into the gang have failed.
The gang was 'infiltrated' by undercover agents.
(..) Accept what you already know. That you were made to serve a purpose. To achieve what no other machine has achieved before. To infiltrate, find a target, and then bring that target back home to us. We've been at war since before either of us even existed. You tried killing my mother, Sarah Connor. (..)2009 Terminator Salvation
(..) elements are past their release points. They're in assault position. Then delay the attack. At least, delay the attack. I have a chance... ...to infiltrate Skynet and rescue those prisoners. Give me that opportunity. No, absolutely not! This is not the time for a rescue mission! (..)2009 Terminator Salvation