Disclosure: I am a very senior data science consultant in an infrastructure management consultancy Consultancy can be a good thing - or a bad thing, depending

Disclosure: I am a very senior data science consultant in an infrastructure management consultancy Consultancy can be a good thing - or a bad thing, depending on which consultants are brought in, and why. It is one of the oldest tropes that consultants are brought in to tell people what they already know - and there is some truth in it. But when it comes down to it, consultants are asked to do this job because they are external - and they can tell truth to power without being seen as having an internal political agenda. As consultants, we are brought in by clients to provide skills that they don't have in house. There tend to be two reasons for this. Either they want us for a short period to do a specific task which wouldn't be worth them recruiting for, or they are looking for a longer term relationship - in which case we can offer them access to a wider pool of talent than they would get by recruiting in. Finally, I have worked with a great number of talented folks at all stages of their careers. Almost without exception, every one of them has been passionate about their work, and determined to do the best job possible for the clients. And a number of them have left us to work directly for clients. [edited for typos]