The projects include rail developments outlined in the recently published Dublin Transportation Office strategy A Platform for Change.
This includes plans for additional light rail lines, metro proposals, the Dublin Area Rapid Transit and heavy rail projects.
Ernst & Young PFI director Will McWilliams said: "PPP is new in Ireland so we are working with the Irish government to understand what it is trying to achieve and encapsulate that in a policy." Other members of the consortium include public policy and economic adviser Fitzpatrick Associates.