For new data architects to have access to domain project, they must be added to the Google Group eco-data-architects@solvay.com.

All Data Architects have the ability to add, and remove people from this group.  

To grant a data architect explicit access to one project, add the user to the group of Data Architects that corresponds to the Domain.  See this page: Data Ocean Domain Access (Group Management)

The 1st prerequisite for this is that that a new GCP project has been provisioned for this Data Product.  See, question "I am starting as an architect on a new Data Product, how do I ask for the creation of a GCP Project?"