To earn Certified Service Technician (CST) status, a student must hold a CAT I or higher certification for a minimum of 24 months and successfully complete three courses of study, Advanced Intrusion Systems course, or the online equivalent, and pass the two-hour, proctored examination, Fire Alarm Installation Methods course, or the online equivalent, and pass the two-hour, proctored examination, and Troubleshooting, Service and Maintenance course, or online equivalent,and pass the two-hour, proctored examination.