Hey hi! Cali Co is a bit of an everything company that also changes its focus regularly, so pretty much anything goes (and different stories can still be canonical even if they appear to be contradicting each other). You can specify what your characters are doing, or you can keep it abstract—it's up to you!
The company also leases a lot of building space to other companies (the first few floors of which are public-facing in an open, mall-like area) so if you want your story to focus on a smaller organization, you can go that way too! ^^