"Those that were appointed were not the ones who scored the highest when it came to the employment tests. They were well below on the rankings, yet somehow they landed up [as] colonels and above," said the officer, who has insight into the appointments.
The officer, who cannot be named because he is not authorised to speak to the media, said other staff who were being investigated were administration clerks.
"They deal with sensitive information. Just because they are an admin clerk does not mean that their appointments must not be above board, especially given the information they work with."
He said it was "worrisome" when such a breach occurred, "especially given the types of computers stolen and the offices from which they were taken.
"To get to those specific offices requires access cards. You don't just open the door and walk in."
Mulaudzi said the anti-corruption investigation was initiated recently when allegations were brought to Matakata's attention.