thanks a lot for the question. :)
It is an important point because these “fillers” both make the speaker not credible, uncomfortable and are annoying for the interviewer. Moreover, since consulting is a client facing job, it is fundamental to try to avoid them as much as possible.
I can give you 3 main advices:
1) Be aware of which/how many “auxiliary words" you use: it is very useful to ask for the help of someone so that he can take notes of all them. After that, read the report and train yourself to eliminate them
2) Substitute them with pauses: these will be useful for 3 main reasons: 1) Give time to the interviewer to reflect on what you are saying 2) Give time to yourself to think about the best answer 3) Make your reasonings clearer. In any case, it is better a pause at the wrong moment than an auxiliary word
3) Go on with your speaking: even if you do not have the perfect word, do not interrupt yourself. You will have the next sentence to clarify your reasoning
Do not hesitate to reach out me in case of further questions!