Smart Shield Systems is San Diego's trusted Security System Installer for homes and businesses. We design, install, and maintain residential & commercial security systems: security camera installation (CCTV) and HD video surveillance, intrusion/burglar alarms with 24/7 alarm monitoring, access control systems & smart locks, intercoms, doorbell cameras, and smart home automation. View live video, receive mobile alerts, and control everything in one app. We handle new installs, upgrades, and system takeovers-wired or wireless, cloud or on-site recording. Ideal for homes, apartments, offices, retail, warehouses, HOAs and medical suites. Local technicians serve all of San Diego neighborhoods. Free on-site quote.