BSA is a relatively young but very dynamic consulting boutique. One of my ex-colleagues from our Automotive practice moved there couple of years ago.
Among traditional topics like performance increase, process and orga optimisation, they do pretty much of the innovation stuff like digitization and new mobility services (autonomous, connected, electric vehicles, etc.).
Working culture is pretty good, since the company is still pretty small, so most of the colleagues normally know each other.
I can tell you more about mandates, rates, etc, if you contact me directly, since it's not publicly available information.
I hope it helps.