Network Engineer

Matchbox; Sydney; Hybrid; AUD 150,000 - 190,000; Full time

Job summary

Firmus Technologies in Sydney seeks a Network Engineer/Senior Network Engineer to lead design and deployment of AI infrastructure networks. You will architect and maintain LAN/WAN/WLAN/VPN, implement security and zero-trust practices, and drive network automation initiatives across on-prem and cloud environments.

The role requires 8+ years in network engineering, strong Linux networking, and hands-on experience with InfiniBand, RoCE, and open-source NOS like Cumulus Linux/Sonic.

Qualifications

• Bachelor’s degree in a technical field and 8+ years in network engineering for AI infrastructure.
• Strong experience with LAN/WAN/VPN design, security policy enforcement, and network automation.
• Proven ability to lead complex networking projects, mentor juniors, and work across teams.

Responsibilities

• Architect, deploy, and maintain corporate LAN, WAN, WLAN, and VPN networks.
• Ensure high availability, security, and performance for on-prem and cloud-connected services.
• Develop IaC-driven configurations with Ansible, Netbox, and Python scripts.
• Create CI/CD pipelines for network changes and automate provisioning, backups, and compliance checks.
• Implement firewall rules, VLANs, ACLs, and zero-trust networking between data centres and partner networks.
• Provide on-call support and collaborate with security, data centre, and software teams.

Skills

LAN/WAN/VPN

Network automation

NetDevOps

Security policy

NVIDIA InfiniBand

Spectrum Ethernet Platform

RoCE

Python

Ansible

CI/CD

Monitoring & incident response

Linux networking

On-site deployment

Education

Bachelor’s degree in network engineering

Tools

NVIDIA InfiniBand

Spectrum Ethernet Platform

RDMA (RoCE)

Cumulus Linux / Sonic

Job description

# Network EngineerFirmus TechnologiesOn-site • Sydney, New South Wales, AustraliaFull-time## Role OverviewFirmus TechnologiesFirmus Technologies is a global leader pioneering the development and operation of efficient AI infrastructure across Asia Pacific.Founded in Australia in 2019, our mission is to create the most efficient AI infrastructure by combining cutting-edge technology with a steadfast commitment to sustainability.At Firmus, we are unique in our approach. We design, build, and operate a new class of digital infrastructure – the AI Factory. Through our model-to-grid technology approach, we have pushed the boundaries of multi-generational liquid cooling systems, energy management, AI software orchestration, and construction. For our customers, this approach allows us to make every watt count and deliver low-cost AI tokens globally.Firmus AI CloudOur large-scale GPU cloud platform, Firmus AI Cloud, is purpose-built to deliver energy-efficient AI compute at scale to customers.It empowers developers, enterprises, educational institutions, and government users to train and deploy AI models with unmatched efficiency and cost savings. With an ever-growing suite of services and applications, we are committed to delivering a cloud experience that is market-leading, proprietary, and built to scale.Why you’ll love working hereAs an NVIDIA Cloud and Engineering partner in Asia Pacific, you will gain skills, experience, and exposure across the AI industry and be part of shaping what this industry looks like for decades to come.We are founder-led, not a big corporate. Decisions happen fast, our leaders are accessible, and there's minimum bureaucracy between you and the work.Ownership comes early. Whatever your role, you will have a direct line to outcomes, helping shape how the business grows as we scale nationally across a long-term, large-scale roadmap.Work alongside founders and experts in AI infrastructure, energy systems and next-generation compute.What we build here has impact beyond the business. Our AI Factories are designed to operate as assets to the energy grid to actively strengthen the communities and regions they operate in rather than drawing from them.Role SummaryFirmus Technologies is seeking a skilled Network Engineer / Senior Network Engineer to join our Engineering and Technology team. The ideal candidate will play a crucial role in leading the development of our network designs and supporting the network deployment for AI infrastructure projects. This role offers an exciting opportunity to work at the forefront of AI networking technology and contribute to the growth of AI infrastructure.Key ResponsibilitiesDesign, Implement and Maintain Network Infrastructure* Architect, deploy, support the corporate LAN, WAN, WLAN, and VPN infrastructure.* Ensure high availability, performance and security of on-premise and cloud-connected network services.* Setup, configure and maintain secure site-tp-site VPNs, MPLS links, or private interconnects between data centres, customer site, cloud environments and partner networks.Network as Code and Automation* Develop and maintain automated network configurations using Infrastructure as Code (IaC) tools (eg: Ansible, Netbox, Python scripts)* Implement CI/CD pipelines for network changes to improve speed, consistency, and auditability* Automate routine tasks such as provisioning, backups and compliance checks.Network Security and Policy Enforcement* Implement and manage firewall and security devices. Apply firewall rules, VLAN segmentation, ACLs and zero-trust principles to safeguard internal and external communications.* Collaborate with SMC Security and Risk team to enforce policies and respond to security incidents.Operation Support* Respond and resolve escalate network issues, outages and performance degradations across the SMC Corporate and Compute network infrastructure.* Analyze logs, run diagnostics and coordinate with vendors, carriers as needed.* Work with internal observability team to setup and maintain monitoring tools to proactively identify bottlenecks, errors and abnormal behaviours.* Analyze trends for bandwidth, hardware utilization, and growth to inform scaling and make recommendation to procurement decisions.* Design and rest redundant paths, failover mechanisms and DR playbooks to ensure uninterrupted connectivity during outages or maintenance.* Participate in operation standby roster and on-call for time to time.Project Management and Stakeholder Management* Support the deployment team in their project management and resource allocation for the network portion of AI cluster installations.* Collaborate and work closely with Global Operation Centre, Software Defined Infrastructure team, Data Centre Infrastructure team and Solution Architects to support deployments and to maintain SLAs.Technology Expertise* Maintain and expand expertise in physical network hardware and advanced networking technologies, including (i) NVIDIA InfiniBand; (ii) Spectrum Ethernet Platform, and (iii) RDMA over Converged Ethernet (RoCE).* Familiar with open source network operating systems such as Cumulus Linux and Sonic* Maintain and expand expertise in NetDevOps practices to maintain software defined network infrastructure* Provide technical support and troubleshooting for advanced networking technologies, escalating to vendors as needed.* Mentor junior network engineers, assisting with their technical development.Stakeholder Management* Work closely with both Firmus Engineering and Commissioning teams to align network infrastructure with customers’ requirements.* Facilitate knowledge sharing and communication between teams and create and maintain comprehensive technical documentation.* Maintain and build strong relationships with key technology partners and vendors and proactively manage and coordinate partner engagement on site.Skills & Experience* Bachelor’s degree in network engineering, computer science, or a related technical field.* 8+ years of experience in network engineering, with a focus on AI infrastructure.* Experience in Linux systems especially host network configuration.* Strong project management skills and experienced in complex technical projects.* Excellent problem-solving and analytical skills.* Ability to work independently and as part of a team.* Strong communication skills, both written and verbal.* Willingness to undertake international and/or domestic travel for on-site deployments and commissioning.* Solid understanding of advanced networking technologies, particularly those related to AI would be highly advantageous.* Hands-on experience with NVIDIA InfiniBand, Spectrum Ethernet Platform, and/or RDMA over Converged Ethernet (RoCE) preferred.Key Competencies* Enterprise & AI network delivery (LAN, WAN, WLAN, VPN)* Secure connectivity (site-to-site VPN, MPLS, private interconnects)* Network automation & NetDevOps (IaC, Ansible, Python, CI/CD)* Network security (firewalls, VLANs, ACLs, zero-trust)* Operations, monitoring & incident response* AI networking tech (InfiniBand, Spectrum, RoCE)* Linux networking fundamentals* Cross-team collaboration & mentoringLocation & Reporting* Sydney, New South Wales, Australia* Reporting to Senior Manager, NetworkingEmployment BasisFull-timeDiversityAt Firmus, we are committed to building a diverse and inclusive workplace. We encourage applications from candidates of all backgrounds who are passionate about creating a more sustainable future through innovative engineering solutions.Join us in our mission to revolutionize the AI industry through sustainable practices and cutting-edge engineering. Apply now to be part of shaping the future of sustainable AI infrastructure.