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Senior systems & network administrator

Limassol, Limassol - Omonia
Posted: 19.08.2025 11:54 Ad ID: 5950383
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Senior Systems & Network Administrator

Location – Limassol, Cyprus | Reports to – Head of IT

Role Summary:

Deliver expert systems and network administration for workloads running on VMware vSphere, AWS and Vultr, and for the LAN/WAN infrastructure that connects our offices. You will secure and optimise mixed-OS servers, configure Fortigate/MikroTik networks (HA, dual ISP, SD-WAN, IPsec), and keep documentation, monitoring and DR plans up to date.

Key Responsibilities

* Server & Virtualisation – Patch, harden and tune Linux and Windows VMs on vSphere; maintain self-hosted open-source platforms for ticketing, collaboration and internal portals.

* Cloud Services – Design and manage resilient AWS environments (VPC, EC2, ELB, S3, snapshots) while supporting existing Vultr resources, applying encryption and strong IAM controls.

* Network & Voice – Configure Fortigate and MikroTik firewalls in HA; implement VLAN segmentation, dual-ISP fail-over, IPsec tunnels, SSL-VPN and SD-WAN overlays; apply QoS for cloud VoIP.

* Office Infrastructure – Audit and optimise switching, Wi-Fi and cabling in every location; produce accurate topology diagrams, asset inventories and change records.

* Monitoring & Continuity – Deploy and maintain a unified monitoring stack; run backup, restore and DR tests that meet agreed RPO/RTO targets.

* Messaging & Domains – Provision users in Zoho Mail and Google Workspace; manage DNS, SPF/DKIM/DMARC and SSL certificates.

* Documentation & Mentoring – Publish runbooks and post-incident reviews; guide junior technicians and share the on-call rotation.

Required Skills & Experience

* 7 + years administering Linux environments plus Windows experience.

* Advanced VMware vSphere skills (clusters, snapshots, resource controls).

* Proven expertise with Fortigate and MikroTik in HA, multi-ISP designs, IPsec and SD-WAN.

* Experience integrating cloud VoIP/SIP services and tuning network QoS.

* Strong AWS knowledge and familiarity with Vultr.

* Scripting/automation ability (Bash or Python).

* Networking fundamentals: VLANs, BGP/OSPF, STP, LACP, IPv6.

* Demonstrated success in backup, recovery and DR planning with thorough documentation.

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  • Salary is negotiable
    Julia

    Posting since apr, 2025

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