And we're absolutely certain Sir Iain won't profit by this move
Sort of goes along with this earlier story: http://www.theregister.co.uk/2015/11/16/uk_gch1_1900_staff/
"Yes, GCHQ is hiring 1,900 staffers. It's not a snap decision"
Here in the fine ole USofA, we have all sorts of laws and oversight to make sure that government officials can't just go into a private company and benefit by their connections.
Wait, what's that you're telling me? Oh, I misunderstood. That only applies to low-level functionaries.