Senior Network Administrator

3 days ago

Dublin, Ireland Lex Consultancy Full time

Senior Network Administrator (24-Month Fixed-Term Contract) Salary: €50k€70k (approx., depending on experience) Location: Dublin 2 A public-sector organisation is seeking a Senior Network Administrator for a 24-month fixed-term contract, employed via agency. The role sits within the IT Infrastructure team and will support and manage a complex hybrid IT environment across multiple sites. Key Responsibilities Administer Microsoft Active Directory (Windows Server 2016/2019). Manage Microsoft 365, including Exchange, SharePoint, Teams & Cloud PSTN. Configure and support physical and Hyper-V servers, SANs, and Windows Server environments. Manage Fortinet firewalls and global/core network infrastructure. Perform hardware/software upgrades; monitor antivirus deployment and updates. Manage Veeam backups and restores. Ensure network/IP connectivity across workstations, servers and office infrastructure. Diagnose and resolve network performance issues. Apply security updates/patches and monitor network security. Support incident resolution, risk management, and disaster recovery planning/testing. Provide 3rd-level support to internal IT teams. Maintain infrastructure documentation; participate in IT procurement. Travel and occasional out-of-hours work may be required. Essential Qualifications & Experience The following up-to-date Fortinet certifications are mandatory: NSE4 NSE6 (FortiNAC) NSE7 Additional requirements: Level 8 degree (or equivalent). Strong knowledge of SCCM, DPM, Defender, Intune, PRTG, Microsoft Hyper-V. Experience with network analysis tools: SNMP, Wireshark, PRTG. Strong understanding of TCP/IP, subnetting, VLANs (Firewall, Switch & Hyper-V). Experience managing hybrid on-prem/cloud environments (including Azure). Excellent communication, problem-solving and planning ability. Ability to work under pressure, maintain confidentiality, and operate independently. Full drivers licence (desirable). Please note only candidates that match the minimum job requirements above will be contacted for this role. Skills: Network Administrator Senior Network Administrator Fortinet certification

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