An Antiterrorism Officer (ATO) is responsible for developing, implementing, and overseeing measures to prevent and mitigate terrorist threats. They assess risks, conduct vulnerability analyses, and coordinate security protocols to protect personnel, critical infrastructure, and sensitive assets. ATOs often collaborate with law enforcement, military, and government agencies to enhance security awareness and emergency response planning. Their duties may include training personnel, conducting security drills, and ensuring compliance with antiterrorism policies and regulations.