Not how it works, sadly. It's not so much a familiar as it is one of those beings you'd make a deal with as a D&D warlock. Give me additional powers and stuff, but they don't actually accompany me on missions and stuff.
There are feats that make my signature harder to trace, however. Though we have less points to spend on those at Street level too, so I run into the same problem as with Cyberware in that fewer resources need to be spent wisely.