This was for a v.large investment bank. There are most likely other departments, but HR generally manage all of the trip details and are the front for the empl

This was for a v.large investment bank. There are most likely other departments, but HR generally manage all of the trip details and are the front for the employee. i.e. to save the employee wasting a bunch of time talking to X number of depts (that don't return calls etc) to try and get things setup. i.e. From a costing perspective, you don't want senior people or super busy (and expensive) engineers wasting a bunch of time.