No knowledge
Aware (some knowledge of)
Working (can use and apply)
Practitioner/expert (helps others)
Interactive data exploration/visualisation
Programming concepts generally (variables, functions, scripting, etc)
'Traditional' advanced techniques (e.g. factor and cluster analysis, multilevel regression)
Software development (e.g. writing R packages/Python libraries)
Working with big/complex data
'Modern' advanced techniques (e.g. machine learning, natural language processing)