If you are going to call a consultant in to help with one area of the business, you should involve those whose work is going to be impacted by the consultant’s work, at least for:

• Defining the scope of the consultant work
• Selecting the consultant
• Onboarding the consultant
• Working with the consultant

It still puzzles me how many companies only require for management and leadership team to be involved, every step of the way. And how they expect to get long term outcomes from the investment.