Four areas, and the T-shape
The function draws on four competency areas: regulatory, technical, assurance, and organisational.
Almost nobody holds all four at depth, and the expectation that you should is what stops people entering the field. The realistic shape is deep in one, functional in the other three, which is enough to do the work and to know when to bring in someone deeper.
Functional means something specific here: enough to ask the right question, understand the answer, and recognise when the answer is evasive. It does not mean enough to do the other person's job.
A privacy lawyer moving into this work does not need to train models. They need to know enough about how models are built and evaluated to ask why the disaggregated performance was not measured, and to recognise that a vendor's response was not an answer.
An engineer does not need to interpret statute. They need to know the Act's structure well enough to recognise that a proposed use has moved a system into an Annex III area, and to escalate before it ships rather than after.
The rest of this lesson sets out what functional means in each area, and how to get there from where you are.

