IT System Administrator (Network & Telephony)

About the role

Howden Hellas, a multinational insurance and reinsurance broker in Greece, is looking for an entry-mid level System Administrator to join its IT team in Athens. The role focuses on networking and telephony infrastructure: maintaining the LAN/WAN environment, VoIP/telephony systems and core network hardware, while assisting with general server and systems administration. It suits someone with foundational networking knowledge who wants hands-on experience with enterprise infrastructure.

Key responsibilities

• Install, configure and maintain switches, routers, firewalls and wireless access points, and monitor network performance and availability
• Troubleshoot connectivity issues across LAN, WAN and VPN links, and support VLAN, routing and firewall rule management
• Maintain network documentation and assist with access control lists, device patching and anomaly monitoring
• Administer VoIP systems (e.g. Cisco, Avaya, Microsoft Teams Phone, 3CX) and manage handsets, extensions, call routing, voicemail and hunt groups
• Troubleshoot call quality and dropped calls, and coordinate with telecom carriers on line provisioning and outages
• Assist with Windows/Linux server, Active Directory, DNS and DHCP administration, backups, patching and monitoring
• Support helpdesk tickets and infrastructure projects such as office moves and network upgrades
• Maintain asset inventory and provide end-user support for hardware, software, network and account issues

Required profile

• 1-3 years of experience in system administration, network support or telecom support
• Solid understanding of TCP/IP, VLANs, routing, switching, DNS, DHCP and VPN
• Exposure to VoIP concepts (SIP, QoS, call routing) and basic firewall/security knowledge
• Familiarity with Windows Server and/or Linux administration
• Comfortable with network monitoring and diagnostic tools (Wireshark, PRTG, SolarWinds)
• Preferred: hands-on VoIP platform experience, cloud/hybrid networking (SD-WAN, site-to-site VPN, Azure/AWS), structured cabling and a degree in IT or telecommunications

What we offer

• Competitive salary and performance-based incentives
• Ongoing training and career development
• Private medical insurance
• Flexible working model with international exposure
• Access to tools, platforms and global expertise, and work on multinational accounts