Administer Windows Server environments, Active Directory, and Entra ID (users, group policy, DNS, DHCP, certificates).
Administer Linux servers supporting internal services and monitoring tools.
Plan and execute OS patching cycles through WSUS and equivalent Linux tooling, and track patch compliance.
Operate the virtualization platform (currently VMware; migration to hyperconverged infrastructure is planned) – host maintenance, capacity monitoring, VM lifecycle.
Support storage and replication operations between the main and DR sites.
Run and verify daily backup jobs (Veeam), perform restore tests, and keep restore evidence current.
Participate in scheduled DR drills and failover testing.
Maintain and extend Zabbix monitoring coverage across servers, services, and scheduled jobs.
Respond to infrastructure alerts and escalate per the incident procedure.
Take part in infrastructure upgrade and migration projects, including server OS upgrades and platform replacements.
Support internal and external audits with evidence and technical clarifications.
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