Jameson

Jameson was an employee of CTU Los Angeles who was adept at tracing calls.

Day 4
After discovering a number on Henry Powell's cell phone, Erin Driscoll asked Edgar Stiles to trace its whereabouts. Edgar said he would triangulate the call, and that Jameson could help him set up in a couple of minutes. Later the call was traced to Dina Araz's location, in Chatsworth.