Absolutely.
Every jurisdiction has a slightly different process for choosing not only the audit reports but also who comes to the committee. In good practice, it is most appropriate to choose the most relevant senior official. That is the deputy minister, because they are the accounting officer. Mr. Murphy, who will be speaking next, was actually chair when that became the formal process for choosing people. I'm not sure of the technical term for it.
That's always the ideal person. They are the ideal people because they are the ones with the responsibility of administering that department or organization. The more advance information you can give to a department that's coming about what you want to hear from them, the better. Then the deputy minister can have the appropriate supporting people available to be able to give you the answers you're looking for.