You constantly have to sell in consulting, even as a junior; a few examples:
- You need to sell your own performance to the team from the very start and show that you are basically irreplaceable
- You need to sell the results of your analysis and your presentation to your engagement manager and the partners, then the client
- You need to sell your recommendations and opinions to the clients so that they decide to implement them
- As you progress up the ranks, you need to transition and start building client relationships to win new engagements
The sales aspect is the reason why McKinsey has a PEI dimension called personal impact, that tackles this skill in great detail.