Senior Network Infrastructure Engineer

Category Support Services Job Type Full time Job Id R2123464 Posted Date 06/24/2026

Sydney, New South Wales

Brisbane, Queensland

Canberra, Australian Capital Territory

JOB DESCRIPTION

Title:

Senior Network Infrastructure Engineer

At KBR – We do things that matter.

We deliver science, technology and engineering solutions to governments and companies around the world. KBR employs approximately 38,000 people worldwide with customers in more than 80 countries and operations in over 29 countries.

KBR is proud to work with its customers across the globe to provide technology, value-added services, and long-term operations and maintenance services to ensure consistent delivery with predictable results. At KBR, We Deliver.

Think.KBR.com

KBR in Australia

With over 65 years working on some of Australia’s largest and most complex projects, KBR has unmatched experience supporting the nation’s critical infrastructure, energy transition and national security priorities. KBR has around 2,000 employees throughout Australia, who are focused on delivering innovative technology and engineering solutions for a safer, more secure and sustainable future.

Learn more about KBR in Australia

Belong, Connect and Grow at KBR

At KBR, we are passionate about our people and our Zero Harm culture. These inform all that we do and are at the heart of our commitment to, and ongoing journey toward being a People First company. That commitment is central to our team of team’s philosophy and fosters an environment where everyone can Belong, Connect and Grow. We Deliver – Together.

The Opportunity:

This is an opportunity to work in a senior technical role supporting secure, enterprise scale environments in a highly regulated setting. You will be responsible for maintaining and improving critical platforms across networking, servers, storage and backup technologies, while contributing to operational resilience, security and ongoing infrastructure improvement initiatives. The role offers broad exposure across enterprise technologies and the opportunity to work on complex technical challenges and high impact operational outcomes.

This is a permanent full-time opportunity and must be based in Sydney or Canberra. Relocation assistance may be considered for the right candidate.

The successful candidate must hold a Baseline security clearance or higher.

Responsibilities:

Support and maintain enterprise infrastructure across network, server, storage, backup and virtualisation platforms.

Configure, administer and optimise complex Cisco network environments, including Cisco ISE, Cisco NDFC, Nexus switching, Leaf-Spine architectures, VXLAN and SD-WAN technologies (Viptela and/or Meraki).

Manage and support secure network services, including Palo Alto firewalls, VPNs and remote connectivity solutions.

Administer F5 BIG-IP load balancing platforms and Azure cloud networking services.

Support Windows, Linux and VMware environments, ensuring high availability, performance and security.

Troubleshoot and resolve complex infrastructure, networking and connectivity issues across multiple technology domains.

Perform upgrades, patching, monitoring, lifecycle management and capacity planning activities.

Support backup, recovery, disaster recovery testing and operational resilience initiatives.

Contribute to incident, problem and change management processes, ensuring reliable and secure service delivery.

As the ideal candidate you will bring:

Required:

Australian citizenship and Baseline security clearance or higher

Strong hands-on experience with Cisco networking technologies, including Nexus switching, Cisco ISE, SD-WAN and modern data centre networking concepts.

Experience supporting Palo Alto firewalls and enterprise network security environments.

Experience with F5 BIG-IP load balancers and Azure cloud networking.

Strong knowledge of routing, switching, network segmentation, VPNs and network security principles.

Experience supporting Windows Server, Linux and VMware environments.

Proven ability to diagnose and resolve complex technical issues across enterprise infrastructure platforms.

Strong understanding of operational best practices, including monitoring, patching, documentation and change control.

Excellent communication and stakeholder engagement skills.

Desirable:

Experience within Defence, Government or other highly regulated environments.

Exposure to enterprise storage, backup and disaster recovery technologies.

Experience with automation and scripting tools such as PowerShell, Python, Ansible or Terraform.

Exposure to Azure or hybrid cloud environments.

All candidates will be required to hold and maintain an active Baseline Defence Security Clearance. Only candidates holding a Baseline Clearance or above should apply.

What we will offer you:

A workplace culture certified as a Great Place To Work

Flexible working

Competitive salary (including annual reviews)

Paid parental leave

Income protection

Corporate rewards

Salary packaging/Novated leasing

Employee stock purchase plans

Flu shots, skin checks and discounted private health insurance

Career development: Online learning, mentorship and career pathways

Please note. Shortlisting will take place as applications are received, therefore the advertisement may close early if a suitable candidate is identified.

As a Major Service Provider of the Australian Defence Force, an AGSVA security clearance will be required and compliance to International Traffic in Arms Regulations (ITAR). As such, our hiring decisions are based on the key requirements of each role and candidates are selected based on their unique strengths and experiences.

Notice to Third Parties/Recruitment Agencies: KBR Australia does not accept unsolicited resumes or any liability associated with fees or costs from recruitment agencies, search firms or third parties who have not been engaged directly on this job opportunity. Candidates interested in applying are welcome to submit their application online.