The Special Operations Engineer Regiment (SOER) is a specialised unit of the Australian Army. The regiment forms part of the Special Operations Command. The unit was formed in 2002 as the Incident Response Regiment (IRR), they are deployed to respond to chemical, biological, radiological, nuclear or explosive incidents. The regiment was transferred into the newly raised Special Operations Command in 2003. In 2010 and 2011, its role changed to supporting the army's special forces units, and it was renamed accordingly.