Develops and uses information from a wide variety of sources such as electronic devices, informants, private citizens, victims, and officials from Federal law enforcement agencies, to investigate and, when appropriate, apprehend individuals suspected of being involved in crimes, in support of the subsequent preparation and presentation of federal court cases in collaboration with other Federal agencies. Time-in-Grade Requirements: Under competitive merit promotion procedures, any individual who is currently holding, or who has held within the previous 52 weeks, a General Schedule position under a non-temporary appointment in the competitive or excepted service, must meet "time-in-grade" requirements (have served 52 weeks at the next lower grade of the grade for which you are applying).