If you are a traditional Beauracrat who believes in the ladder climb in Government then this place will really frustrate you as it attempts to challenge that.
Equally if you are used to the private sector then this place may also frustrate you as it does have process and procedures akin with other Government Departments.
The DTA's mandate is a near impossible task; fix the Government while being a part of the Government. Affecting change in a systemic and deeply embedded culture of red tape and hierarchy will take years, the DTA will always have a rough time being accepted by it's fellow Departments because of its fundamental positioning flaw.