This is ridiculous that you cannot add more than one contact per customer in QBO. I deal with contractors and one customer will have multiple purchasers, estimators, project managers, accountants, coordinators etc. QBO needs a system like desktop version where you can add multiple names along with the corresponding title, work #, cell #, email.

It's not feasible to add them under a job under a customer. It needs to be in the customer profile and formatted in a way that you also export a customer list that shows all of the names under each customer.