> agencies will gladly throw people at a problem regardless of the skills list, as long as the team learns to swim fast enough.

I did a few years at a company which was "product development consultancy", and this aspect of it was really enjoyable. We got a set of diverse challenges through the door, often "virtual startups" (CEO hiring consultants rather than staff in order to do v1 of a product). The company was basically a single room, and we had two senior guys (the founders) to review work and support us. Plus one "smartest guy in the room" who served as mathematician fire-support for things like signal processing or the rare actual DS&A problem.