You are an independent coach. They are the ‘associate partner’, you are the ‘associate’. Jones & Associates don’t want to hire coaches full time as they don’t know when they'll need them and they also want to offer diversity to their clients.
They win a piece of business, let’s say it’s a leadership development programme for managers, and Jones & Associates now need coaches to deliver that coaching work on their behalf. They perhaps have more than they can personally deliver or they might not want to handle any delivery so they can concentrate on the client development and winning new business.