It sounds like what you need is a draftsperson since you already have designed and worked out what you want, I don't think you would benefit much from an architect, besides, it's going to be very difficult, but not impossible, to find some one that knows Chief Architect, since most architect and draftspeople tend to use either Autocad, Revit, or other more popular software. Perhaps someone can transfer the drawings to their software and work with you. I agree with you, I find Chief one of the best yet undiscovered software's out there. and I have tried and used all of them, including ArchiCad. I now use Chief exclusively for design and working drawings, very intuitive and great with finishes.
Good Luck,
Emilio
p.s I am from your area, Woodland Hills.