Internal Auditor
  
Tracking beans. Graft. Corruption. Theft. Most large companies have myriad financial forces that they have to track, re-track, double-and-triple-check, and hunt down. This is the role of the internal auditor.
That is, rather than have bad accounting practices discovered by the company's external auditor (and then have all kinds of nasty letters, potential fines, and other bad things happen), many large companies employ their own "captive" internal auditors, i.e., employees of the company who proactively audit the books of the company, hopefully discovering issues before they become a Thing.