Senior System Administrator

As a Senior System Administrator, your role involves managing and maintaining the organisation's IT infrastructure, ensuring high availability, security, and performance of all IT systems while supporting business operations. Here are your key responsibilities: - Install, configure, and maintain Windows Server environments (Active Directory, DNS, DHCP, Group Policy). - Manage and maintain Linux machines for application hosting and system services. - Administer and maintain Application Servers supporting internal business applications. - Manage and maintain Biometric Servers used for employee attendance and access control systems. - Monitor server health, performance, and system logs. - Perform system updates, patches, and security hardening. For Storage and File Services, you will: - Manage and maintain Samba File Servers for shared storage and user access. - Administer NAS storage systems (Synology), including storage allocation, access permissions, and performance monitoring. - Ensure proper storage utilisation and secure data access. In Network Infrastructure Management, your responsibilities include: - Configure and manage Sophos Firewall, including firewall rules, NAT policies, VPN configuration, and threat protection. - Configure and maintain Cisco and Netgear switches, including VLAN configuration and network segmentation. - Manage and maintain wireless access points to ensure reliable and secure Wi-Fi connectivity. Proxy and Security Management duties involve: - Install, configure, and maintain Proxy Servers for internet access control and monitoring. - Monitor firewall logs, network security alerts, and implement security policies. - Ensure network infrastructure is protected against unauthorized access and threats. Backup and Disaster Recovery tasks include: - Implement and manage backup and restore solutions for servers, NAS, and critical business data. - Perform periodic backup verification and disaster recovery testing. - Ensure backup policies and schedules are properly maintained. For Power and Infrastructure Management, you will: - Monitor and maintain UPS systems to ensure an uninterrupted power supply for servers and network infrastructure. - Coordinate with vendors for UPS maintenance, battery replacement, and power infrastructure reliability. Your role also involves System Monitoring and Troubleshooting: - Proactively monitor servers, network devices, storage systems, and applications. - Troubleshoot and resolve system, network, and application-related issues. - Maintain proper documentation of infrastructure configurations and procedures. Additionally, you will be responsible for Vendor and Infrastructure Coordination: - Coordinate with vendors for hardware procurement, infrastructure support, and service management. - Plan and implement infrastructure upgrades and improvements. Qualifications Required: - Strong experience with Windows Server Administration. - Good knowledge of Linux System Management. - Experience with Sophos Firewall. - Knowledge of Cisco and Netgear networking devices. - Experience with NAS storage (Synology) and Samba File Server. - Experience managing Application Servers and Biometric Systems. - Experience with Backup and Disaster Recovery. - Understanding of network security and monitoring. As a Senior System Administrator, your role involves managing and maintaining the organisation's IT infrastructure, ensuring high availability, security, and performance of all IT systems while supporting business operations. Here are your key responsibilities: - Install, configure, and maintain Windows Server environments (Active Directory, DNS, DHCP, Group Policy). - Manage and maintain Linux machines for application hosting and system services. - Administer and maintain Application Servers supporting internal business applications. - Manage and maintain Biometric Servers used for employee attendance and access control systems. - Monitor server health, performance, and system logs. - Perform system updates, patches, and security hardening. For Storage and File Services, you will: - Manage and maintain Samba File Servers for shared storage and user access. - Administer NAS storage systems (Synology), including storage allocation, access permissions, and performance monitoring. - Ensure proper storage utilisation and secure data access. In Network Infrastructure Management, your responsibilities include: - Configure and manage Sophos Firewall, including firewall rules, NAT policies, VPN configuration, and threat protection. - Configure and maintain Cisco and Netgear switches, including VLAN configuration and network segmentation. - Manage and maintain wireless access points to ensure reliable and secure Wi-Fi connectivity. Proxy and Security Management duties involve: - Install, configure, and maintain Proxy Servers for internet access control and monitoring. - Monitor firewall logs, network security alerts, and implement security policies. - Ensure network infrast