When the McKinsey consultants worked with us, it was strictly with the subject matter experts. In our case, they were specialists in diversity and inclusion, culture, and related matters such as handling complaints digitally. We were dealing directly with subject matter experts and continually interacting with them to ensure that they were doing what they were supposed to be doing for us.
Evidence of meeting #56 for Government Operations and Estimates in the 44th Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was mckinsey.
A video is available from Parliament.