Overview
Amentum is continually expanding our opportunities working on prominent defence projects across air, land and sea supporting the critical capabilities that keep Australia safe. We have a growing presence in cyber, space and nuclear programs.
What will I be doing day to day?
* Design, implement, and manage OS-level network security using firewalld and/or nftables (e.g., defining zones, services, and rich rules)
* Configure and troubleshoot advanced networking on RHEL, including static routing, policy-based routing, and network-teaming
* Maintain and configure nginx as a reverse proxy for internal web services
* Manage KVM virtualization (libvirt) and associated bridged/routed networking for guest VMs
* Secure and manage remote access protocols, primarily OpenSSH
* Collaborate with the systems team on the migration to RHEL 9
* Contribute to infrastructure planning and the implementation of new systems or upgrades
* Management of updating and patching of the OS and software
* System Administration tasks as required, such as software deployment, upgrade installation, security remediation tasks and account management
* Management of monitoring and logging solutions
What sort of skills do I need?
* Expert-level knowledge of Red Hat Enterprise Linux (RHEL 8/9) administration (RHCE-level skills or equivalent experience)
* In-depth understanding of the Linux networking stack (iproute2, firewalld, nftables)
* Proven experience with nginx for reverse proxy and load-balancing configurations
* Strong understanding of core networking protocols (TCP/IP, subnetting, routing, DNS, DHCP)
* Familiarity with RHEL-based virtualization (KVM, qemu)
* In-depth knowledge of Red Hat Satellite Server, including lifecycle management, patch deployment, and system provisioning
* Thorough understanding of operating system standard operating environments (SOEs), including risk mitigation strategies and security hardening techniques
* Proficient in maintaining technical documentation, including process and architecture documentation using Confluence or similar platforms
* Relevant Linux or Red Hat credentials
* Australian citizenship, NV1 security clearance and ITAR compliance
What's in it for me?
* Flexibility - We like our employees to have the flexibility they need to live the lives they choose. With flexible working options such as WFH where possible.
* Inclusion - Our employees should feel safe bringing their whole self to work, we offer a number of programs promoting inclusion.
* Benefits and Rewards – Our benefits and rewards includes additional superannuation; flexible leave options; salary continuation insurance; professional certification bonus; employee discount program.
Amentum: Trusted Partner in National Security
Amentum is a key service provider to the Australian Government, supporting critical national security and Defence capabilities across land, air, maritime, cyber, space, nuclear, and digital domains. With over 880 professionals nationwide, we deliver complex infrastructure, logistics, and technical solutions with a strong focus on quality, safety, and innovation.
With 27+ years of experience and a presence in major cities and regions, we're proud of our people—our greatest asset. Join us and be part of a high-performing team with exceptional benefits and career opportunities. Apply directly or reach out to Jeremy Parkinson, jeremy.parkinson@global.amentum.com.
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