They dumped him and he went to Booze Allen ~ like to know how that happened ~ could tell us why he turned ~ most likely for reasons similar to that of former FBI agent Robert Philip Hanssen
There is no evidence that “they” dumped him.
When your pay hits the top of the scale, it is quite common to join a consulting firm, take on a new (or the same) assignment and have the firm bill your time as an expense in a cost-plus contract.
People in SigInt IT with active clearances are paid a lot.