As part of an Operational Support Squadron (OSS), the first role of 504 Squadron was Force Protection (FP). To this end, approximately 60% of the personnel were RAF Regiment gunners providing ground defence for all assets on deployed operations. The remaining personnel were responsible for the many other duties including: Chemical, Biological, Radiological and Nuclear (CBRN) warning and reporting, airbase shelter marshalling and general sentry duties. Elements of the squadron deployed operationally to Afghanistan in these roles. During 2014, the squadron re-roled from FP to Logistics. As part of the RAF's No. 85 Expeditionary Logistics Wing (85 ELW) the Squadron is now based at RAF Wittering in Cambridgeshire and is recruiting personnel to train as Chefs, Drivers and Suppliers in support of deployed RAF units worldwide.