Using a 3D simulator to visualize a computing environment is a long way from traditional IT security, but the drama of video gaming actually enables analysts to watch over their networks more effectively. An article New Scientist titled: The real Ton: IT security as a shoot ‘em up describes some research under development at the Lincoln Laboratory, part of the Massachusetts Institute of Technology. In the simulation, network administrators can patrol their environments as if they were playing a first-person shooter - much like in the cult film Tron.
This was presented at the IEEE High Performance Extreme Computing Conference in September 2012. Both the paper and the presentation are available for download.
Although not really gamification in the purist definition, it definitely is an example of serious gaming moving into the IT field.