4th Combat Engineer Regiment (4 CER) is based at East Ringwood, Victoria, and was raised on 1 July 1995. Upon formation, the regiment consisted of the 10th and 35th Field Squadrons and the 38th Support Squadron. It is an Army Reserve unit that provides engineering support to the 4th Brigade, and played a pivotal role in the ADF support to the 2003 Victorian Alpine Fires and the 2009 Black Saturday Fires. Throughout 2009, the regiment also contributed personnel to operations overseas, including deployments to Afghanistan and the Sinai; other personnel took part were detached to Rifle Company Butterworth and Operation Resolute.