Can one be a part-time worker with a CDD at an umbrella company (Portage Salarial) and maintain their AE status?
Just in case anyone else needs to do this. I got a response from a French umbrella company, and the answer is yes, you can have both a CDD with an umbrella company and individual service contracts directly between your micro-entreprise and clients.
Case closed.
I guess the trap will be the tax paperwork