In this talk, we will try to answer who is a big data analyst, a data scientist and, most importantly, how to come to this area. Let's analyze the unsuccessful ways that will most likely prevent you and the ways that will allow you to reach the level of a middle specialist as quickly as possible. Let's say when a data scientist is not needed. We will answer the question about competencies and why they are required with practical examples. We will also analyze a couple of business cases.