How can I include the Latest Hire Date/Enterprise Hire Date in the Payslip XML?

Summary:

My client is coming across an issue due to Global Transfers within their enterprise. Since the system is designed to update the hire date after each transfer, it doesn't reflect correctly for the client since they have transfers within their legal employers quite often. For that reason, they need the "Latest Hire Date" or Enterprise Hire Date reflected on the Payslips to be a true reflection of when the employee joined the company. The Payslip XML only has the hire date and I need the Latest Hire date added first to the XML file before it can be pulled