Yes, there are policy-focused epidemiologists and informatics-focused epidemiologists. My partner is the latter, so I'm much more familiar with that world, and

Yes, there are policy-focused epidemiologists and informatics-focused epidemiologists. My partner is the latter, so I'm much more familiar with that world, and that's what I associate with "epidemiology". There is overlap, of course, but I take your point that you can't necessarily know someone's quantitative analysis skills from knowing they are an epidemiologist. I would just note that "a data scientist with working professional competence in say, R and Pandas" describes a good number of epidemiologists, who also have infectious disease, toxicology, and study design knowledge on top of this.