Network & Security Engineer - Data Centre
Summary
Operates and secures the network and security infrastructure behind large-scale AI/GPU clusters, data centres and cloud services: configuring Juniper, NVIDIA Spectrum/Cumulus and Fortinet gear, managing incidents, firewall policies, monitoring and hardening, plus cabling/optics work, Python/Ansible automation, docs, and 24x7 on-call.
We are looking for an AI Network & Security Engineer to support the network and security infrastructure behind large-scale AI/GPU computing platforms, data centres and cloud services.
This role combines strong enterprise networking and security fundamentals with next-generation AI networking technologies such as NVIDIA InfiniBand, Spectrum Ethernet and RoCEv2.
Key Responsibilities
Operate and maintain network infrastructure supporting AI/GPU clusters and data centre environments.
Configure and troubleshoot switches, routers and firewalls across Juniper, NVIDIA Spectrum/Cumulus Linux and Fortinet platforms.
Support compute, storage, management, OOB and customer connectivity.
Perform cabling, optics, port mapping and physical network validation during cluster deployments.
Monitor network availability, throughput, latency, utilisation and errors.
Troubleshoot network issues involving ports, cables, transceivers, NICs and hosts.
Manage network and security incidents from initial triage through resolution.
Support firewall policies, network segmentation, VPN, NAT and ACL configuration.
Support vulnerability remediation, security hardening and network security assessments.
Assist with network automation using Python, Ansible, APIs and DCIM.
Maintain network documentation, diagrams, SOPs and troubleshooting runbooks.
Support network deployments, maintenance and infrastructure expansion.
Participate in 24x7 on-call support.
Requirements
Bachelor's degree in Network Engineering, Computer Science, IT or a related field, or equivalent practical experience.
5+ years of network engineering experience, preferably in data centre, cloud, service provider or large-scale infrastructure environments.
Strong knowledge of TCP/IP, routing, switching, VLANs, BGP and high-availability networking.
Hands-on experience with Juniper, Cisco, Arista or equivalent platforms.
Experience with enterprise firewalls, preferably Fortinet/FortiGate.
Strong understanding of VPNs, ACLs, network segmentation and security policies.
Strong troubleshooting and analytical skills.
Experience with network monitoring, incident management, RCA and change management.
Exposure to data centre environments, structured cabling and optics.
Knowledge of NVIDIA InfiniBand, Spectrum Ethernet and/or RoCE is an advantage.