Network Security Engineer

The Role

We are looking for a motivated Network & Security Engineer to join our Infrastructure & Network Engineering team.

Our team designs, operates and secures the company’s data-center, office and telecommunications networks. We manage switching, routing, firewalls, VPNs, internet connectivity, inter-site connections and network services across multiple locations.

Your primary focus will be Intellico’s network and security infrastructure, including Cisco networking, Palo Alto firewalls, BGP routing and traffic monitoring. The position also includes selected data-center, corporate IT and telecommunications responsibilities.

You will work closely with the team to ensure secure and reliable connectivity for Intellico’s infrastructure and messaging platforms.

Key Responsibilities

• Design, operate and maintain data-center, office and inter-site networks
• Configure and support Cisco switches, routers and related network infrastructure
• Operate Palo Alto firewalls and maintain firewall security policies
• Manage site-to-site VPNs, remote-access VPNs and external partner connections
• Operate BGP routing and internet edge traffic steering
• Manage VLANs, routing, NAT, network segmentation and IP address spaces
• Manage internet upstreams, carrier connections and connectivity between colocation sites
• Plan and implement network architecture changes, upgrades and lifecycle activities
• Monitor network availability, performance, capacity and traffic flows
• Troubleshoot routing, latency, packet loss, DNS, firewall, VPN and connectivity incidents
• Capture and analyze network and protocol traffic using Wireshark
• Maintain network diagrams, configuration backups, inventories and operational runbooks
• Implement network segmentation, infrastructure hardening and vulnerability remediation
• Review firewall rules, access controls, firmware versions and security configurations
• Support installation, cabling and replacement of network hardware at colocation sites
• Support Proxmox, Linux, DNS, DHCP, NTP and other infrastructure services where required
• Support network-level troubleshooting of SMPP, SCTP and SS7/SIGTRAN connectivity
• Provide secondary support for office networks, Wi-Fi and corporate IT services
• Participate in incident management, infrastructure changes and the compensated on-call rotation

Requirements

• Good hands-on knowledge of TCP/IP networking
• Experience with Ethernet, VLANs, switching, routing and network segmentation
• Practical understanding of firewalls, NAT, access controls and VPN technologies
• Experience with Cisco or comparable enterprise network equipment
• Experience with Palo Alto or comparable firewall platforms is an advantage
• Knowledge of BGP, internet routing and multi-site connectivity is an advantage
• Practical experience with Wireshark and packet-level troubleshooting
• Understanding of network monitoring, capacity management and configuration backup
• Basic Linux and infrastructure administration knowledge
• Knowledge of Proxmox, Ceph, ZFS or virtualization environments is an advantage
• SMPP, SCTP, SS7 or SIGTRAN knowledge is an advantage
• Strong soft skills, including analytical thinking, teamwork, ownership and communication
• Education in IT, networking, cybersecurity, computer science or a related field, e.g.:
• Informatiker/in EFZ, Fachrichtung Plattformentwicklung
• ICT-System- und Netzwerktechniker/in mit eidg. Fachausweis
• Cyber Security Specialist mit eidg. Fachausweis
• Cisco CCNA or a comparable networking qualification
• A comparable technical or university qualification
• Fluent in English, German is an advantage, resident in Switzerland

Practicalities

• Location: Freienbach, Switzerland
• Employment: Permanent, full-time position, 80%-100%
• Working model: Primarily office-based, with up to two home-office days per week where operational responsibilities allow
• Schedule: Normal working hours with participation in an on-call rotation
• Travel: Occasional visits to other Intellico offices and colocation facilities

What We Offer

• Hands-on responsibility for networks connecting offices, data centers, platforms and telecommunications partners
• Exposure to switching, routing, firewalls, BGP, VPNs and telecom connectivity
• The possibility to develop toward network architecture, cybersecurity or telecom engineering
• Meaningful responsibility in a small team without unnecessary organizational layers
• High-quality technical equipment and a modern, comfortable office in Freienbach close to public transport