"Why wouldn't she?"
As far as I can see, no other senior civil servant does, so the odds are not good.
And her background is flipping between different departments and assignments. So chances are she's like the other civil service mandarins - never done anything useful, never worked in a real job, and never even stayed long enough in one place to understand any area of government.
Apart from that, having an Oxford degree in economics I'm sure she's absolutely on top of IPv6, spectrum licensing, effectively regulating Openreach, mobile consolidation, broadband competition, mobile asset sharing, 4G, TV multiplexes, privacy and IoT, not to mention all the issues of being the regulator of the postal service.
What do you think?