Senior Systems Administrator

INGO

- Administer VMware vSphere/vCenter clusters (ESXi hosts, HA, DRS, EVC), including upgrade planning and implementation - Manage SAN and DAS storage (HPE MSA series) via Fibre Channel and SAS — configure LUNs, multipathing, and NVMe datastores - Plan and execute VM provisioning, resource pool allocation, and capacity planning - Operate and optimise Veeam Backup & Replication: backup jobs, replication, proxy configuration, and repository management - Manage pfSense/firewall rulesets, IPsec VPN tunnels, and SIP trunk configurations - Maintain Active Directory domain services, Group Policy (GPO), DNS, and DHCP - Enforce mail security controls: Postfix/Zimbra hardening, DKIM, SPF, anti-spoofing policies - Respond to security incidents and implement remediation measures in line with CBA requirements

- VMware vSphere/vCenter administration (5+ years) - Windows Server and Active Directory (GPO, DNS, DHCP, LDAP) - Linux server administration — Rocky Linux / CentOS / RHEL - Backup & replication with Veeam Backup & Replication - SAN/NAS storage management (Fibre Channel, iSCSI, SAS) - Network fundamentals: TCP/IP, VLANs, firewalls, IPsec VPN, routing - Mail server administration (Exchange, Zimbra or equivalent MTA) - Scripting for automation (Bash, PowerShell, or Python)

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