Periodic maintenance for devices - Server maintenance - All digital systems (surveillance cameras - network extension - fingerprint devices - computers with installation - PBXs) Programming attendance and departure devices 2- Linking branches together (VPN) 3- Surveillance cameras (Samsung - Hikvision - Dahua) view cameras via mobile 4- Working on all servers 5- Maintenance of all desktop and laptop devices 6- Antivirus programs 7- Backup software to preserve information 8- Storage units 9- Network extension and establishment 10- Maintenance of printers, fax machines, and PBXs