HRAnalytics101 is a website for “HR and Human Capital professionals from curious non-technical novices to confident analytics insiders“. They post interesting blogs, walkthroughs on HR-flavored data analysis. I did not want to hold this one post that presents beautiful visualizations on internal mobility streams and offers a demonstration code on how to make them. An example:

HRAnalytics101 MobilityGraph

I suggest you read the full blog article here because it is an interesting read and the visualisations are interactive!