Integrate External Payroll Provider Employee Data for Expense Management

Summary:

Is HDL the most efficient way to create and update employee (person) records from an external Payroll provider for Oracle Expense Management?

The Worker Business Object is rather complex and requires a minimum of 8 unique records 2 load the basic information to create an employee for Expenses:

Worker/PersonName/PersonLegislativeData/PersonEmail/WorkRelationship/WorkTerms/Assignment/AssignmentSupervisor

These elements are needed to create a worker with the following attributes:

Name

Email Address

Supervisor

Default Expense Account

Business Unit

LE

Seems like there would be a more efficient method to integrate this data. Are there other methods (besides HDL) to facilitate this requirement?