If you're wondering where you fit in the data universe, quantitative assessment firm Correlation One has developed a helpful mapping methodology explaining precisely what each role involves and the skills required. We've added its charts to the bottom of this page, but here's our short verbal explanation to accompany them.
As we've noted before, not all data jobs are the same. People talk about big data and data science as if they're catch-all phrases requiring a particular skillset. They're not: data jobs are a broad spectrum and the person who suits one job may not suit another.