Ability to apply filters within the 'Staff' tab

As we operate across 18 sites though staff are all contained within one list, it is often difficult to find particular staff from one site to apply necessary changes within their staff profile. We currently go to the 'Sites' tab, list the staff members on paper and go to the 'Staff' tab to find the staff and make changes (add new positions to particular staff when a site requires a new position etc). If we could filter the staff list by site or position, such changes would be significantly easier and quicker.