Senior L3 Network Engineer

Sydney or Melbourne | 12-Month Fixed-Term Contract

Job Description
Are you a seasoned Network Engineer who thrives in complex, mission-critical environments?

We're partnering with a global operator of large-scale digital infrastructure that powers cloud services, AI workloads, and some of the world's most demanding technology environments. As part of a high-performing Infrastructure Support Services team, you'll play a key role in maintaining the reliability, security and performance of enterprise-scale data centre networks.

This is a hands-on Level 3 engineering role for someone who enjoys solving complex technical challenges, leading incident resolution, mentoring support teams and continuously improving large-scale network environments.

What You'll Be Doing

• Act as the Level 3 escalation point for critical network incidents and technical issues.

• Lead troubleshooting, root cause analysis and permanent remediation activities.

• Support highly available data centre and enterprise network environments.

• Participate in a 24x7 on-call roster supporting Priority 1 and Priority 2 incidents.

• Perform network lifecycle management including patching, upgrades and technology refreshes.

• Drive operational excellence through automation, monitoring and service improvement initiatives.

• Work closely with vendors, internal support teams and project stakeholders.

• Maintain network security, resilience and performance across critical infrastructure platforms.

• Produce and maintain technical documentation, runbooks and operational procedures.

Key Technologies

• Routing & Switching

• Cisco Switching & Routing

• Enterprise LAN/WAN Technologies

• Network Segmentation

• DNS & DHCP

• High Availability Network Design

• Security

• FortiGate Firewalls

• Palo Alto Firewalls

• VPN Technologies

• Security Hardening & Vulnerability Remediation

• Network Access Controls

• UniFi Wireless

• Juniper Wireless Solutions

• Enterprise Wi-FI Deployments

• Wireless Troubleshooting & Optimisation

• Monitoring & Operations

• Network Monitoring & Alerting

• Incident Management

• Operational Support in 24x7 Environments

What We're Looking For

• 10+ years of Network Engineering experience.

• Proven experience operating as an L3 escalation point.

• Strong troubleshooting skills across switching, routing, firewalls and wireless technologies.

• Experience supporting enterprise, managed services, critical infrastructure or data centre environments.

• Demonstrated experience managing P1/P2 incidents and performing root cause analysis.

• Strong understanding of ITIL service management practices.

• Excellent communication and stakeholder engagement skills.

• Experience mentoring L1/L2 support teams.

• Cisco, Palo Alto, Fortinet or Juniper certifications.

• Experience supporting hyperscale, cloud or data centre environments.

• Automation and scripting experience.

• Current NV1 Security Clearance (Nice to Have)

• Australian Citizenship (mandatory) / eligibility to obtain Government Security Clearance.

Why Join Us?
Our promise to our employees, Belong, Grow and Thrive is our commitment to creating an environment that is inclusive to all, supports your professional and personal development, and offers an environment where you can do life and work the way it works for you.

Here is how our benefits help you:

• Equal Paid Parental Leave for all primary and secondary carers.

• Flexible and Focused Ways of Working that empower you to structure your work in a way that best suits you while supporting our customers, people and the planet.

• Employee Assistance Program, providing employees and their immediate families with confidential access to a wide range of counselling and professional support services.

• Purchased Leave options, allowing you to buy up to 10 additional days of annual leave each year to help you balance life's priorities.

• Novated Leasing and Salary Sacrificing options to make your salary work harder for you.

• Diversity, Equity and Inclusion Commitment which places Inclusion as a strategic priority for Logicalis Australia, with investment across DEI programs to foster a workplace culture built on accountability, respect and zero tolerance for exclusionary behaviours.

• Logicalis Learning Space, our Udemy-powered platform, providing unlimited access to thousands of courses to help you develop new skills, enhance your expertise and drive your professional growth at your own pace.

• Investment in Leadership and Career Growth. Logicalis is a place where we see our people as the most valued Architects of Change. Our people progress from Helpdesk to Cloud Engineering, from Sales to Management, and from Operations to Senior Leadership. Here, ideas turn into action. You can make a plan, see it through and genuinely shape your own professional success.

About Us
At Logicalis Australia, we are not just changing the game, we are driving the future of technology.

As the Architects of Change, our mission is clear: to become the leading technology services provider and employer in the Australia and New Zealand (ANZ) region.

By combining our global expertise and local insight, we position ourselves as a technology powerhouse, ready to capture growth opportunities across APAC and deliver exceptional service to our customers.

You will be part of a dynamic team of 7,000 plus innovators, collaborating across 30 territories with over 10,000 clients from diverse industries. Every project presents a unique opportunity to make a tangible impact, empowering businesses to thrive in today's fast-paced digital landscape. With services that drive transformation and scalability such as cloud, connectivity, collaboration and security, you will help optimise operations and enable teams to reach new heights.

As a global leader, our managed services provide real-time insights into clients' digital ecosystems, 24 hours a day, 7 days a week.

We are proud to be Great Place to Work Certified for 2025 and 2026, a recognition that reflects our people-first culture and our commitment to fostering an inclusive, empowering and growth-oriented environment.

Join us on this exciting journey and let us shape the future of technology together.

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