Populate Static Job Requisition Approvers

We have a requirement where details of "Project" and the list of approvers is coming from a third party system. There are 2 levels of approvers for each project. Project's LOV is being populated in the lookup used for seeded field "Job Function" in ORC.

While initiating requisition appropriate "project" is selected in the "Job Function" field. Based on the "Job Function" selection the static approvers coming from the 3rd party system needs to be populated as approvers. 

Case 1:

Job Function (internally called Project): PROJECT1

Approver 1: User1

Approver 2: User2

Case 2:

Job Function (internally called Project): PROJECT2

Approver 1: User3

Approver 2: User4

Can we populate static approvers from a third party system?