Global IT Network Administrator: Security & Uptime

Preh Car Connect GmbH; Lagoa; On-site; EUR 42,000 - 62,000; Full time

Job summary

Preh Group in Trofa, Portugal, is hiring an IT Network Administrator to join our IT team. You will ensure the availability, security, and performance of our network infrastructure, supporting critical operations with reliable connectivity and proactive monitoring.

In this role you will collaborate with internal teams and external partners, maintain documentation, and drive continuous improvement of LAN/WAN, VPN, and security systems. Fluency in English is mandatory.

Qualifications

• Minimum 3 years of experience in network administration.
• Strong knowledge of Cisco, Aruba and Fortinet environments.
• Experience with DHCP, DNS, TCP/IP, SIP, TLS, MFA, Windows Server and Active Directory.
• Fluency in English is mandatory.
• Knowledge of network security concepts (IPS, IDS, NGFW, UTM).

Responsibilities

• Manage and optimise network infrastructure (LAN, WAN, VPN, wireless).
• Install, configure, maintain network hardware, software, and security systems.
• Monitor network performance and ensure availability through preventive actions.
• Diagnose and resolve incidents, minimising business disruption.
• Analyse recurring issues and propose improvements to enhance stability and efficiency.
• Identify risks and contribute to strengthening network security and performance.
• Provide user support, ensuring timely and high-quality service.
• Collaborate with internal teams and external partners on infrastructure projects.
• Maintain clear and up-to-date technical documentation.

Skills

Network administration

Cisco/Aruba/Fortinet

LAN/WAN & routing

DHCP/DNS/TCPIP

Security concepts

Troubleshooting

Stakeholder collaboration

English fluent

Job description

Preh Group in Trofa, Portugal, is hiring an IT Network Administrator to join our IT team. You will ensure the availability, security, and performance of our network infrastructure, supporting critical operations with reliable connectivity and proactive monitoring.

In this role you will collaborate with internal teams and external partners, maintain documentation, and drive continuous improvement of LAN/WAN, VPN, and security systems. Fluency in English is mandatory.