Installing and maintaining intruder alarms, fire alarms, CCTV and more Welcome to AGS Security, the award winning provider of security systems to the North West and North Wales. Offering you a full range of security services for both your business and home, AGS are accredited experts in intruder and fire alarms, CCTV, access control, key holding, monitoring and system maintenance. Now in our 25th year, we’ve installed and maintain thousands of security systems for clients of all sizes; from offices, shops and industrial operations to tourist attractions, government offices and private homes.