An armed security officer protects a facility or person. In this role, your responsibilities include carrying a weapon for defensive purposes and patrolling an area to ensure that it is secure. You also respond to incidents and assess security systems and procedures. If you protect an individual, you accompany them and assess the security situation in the places that they visit. Some entry-level armed security guards must undergo training or certification to gain the qualifications necessary to carry a weapon. You may also need to undergo training to develop skills in specific security practices or techniques.