The missions of this unit are multiple, including long range patrolling, training of other units, VIP security, anti-hijacking, hostage rescue, and counterterrorism. These duties, specifically as they related to CT, are considered supplemental to Ireland's primary response unit, the Garda Siochana. Unit strength is approximately 100 men who are organized into two assault platoons, a support platoon with medical, EOD, aviation, etc. Each of the assault platoons has five assault teams of 3-4 men each. These men are all volunteers, selected from other units already serving with the Defense Forces.
Training includes at least three days and one night on the firing range.
Advanced tactics are taught in parachuting, combat diving, small boat handling, and mountaineering. Interestingly, ARW members are returned to their original units after a set period of time, thus ensuring their expertise will be shared throughout the Defense Forces. The Rangers have received additional training from the Royal Dutch Marines and the U.S. Army's Delta Force. Operational control of the ARW is the responsibility of the Chief of Staff's Branch at Army Headquarters. The unit is currently located at Curragh Camp, County Kildare.