Overview
Profectus is seeking an experienced Senior Linux Engineer to support the design, delivery, and sustainment of secure ICT and platform environments within Defence. This role suits a highly capable practitioner who is comfortable operating in secure, mission-critical environments, and who brings strong Linux engineering expertise, a security-first mindset, and experience working within structured, highly governed settings.
Key responsibilities
* Administer and maintain Linux-based servers and platforms across physical and virtual environments, primarily Red Hat-based
* Support the secure operation of data centre and platform environments, including classified and offline systems
* Design, implement, and maintain secure system and network configurations in line with Defence security requirements
* Conduct system audits, manage patching activities, and remediate vulnerabilities to maintain compliance
* Develop and maintain automation and configuration management using Bash, Python, and Ansible
* Support DevSecOps practices, including CI/CD pipelines and infrastructure-as-code
* Deploy and support containerised platforms (OpenShift, Kubernetes, Docker/Podman)
* Maintain configuration baselines and version-controlled repositories to support repeatable, secure deployments
* Provide technical support to Defence activities requiring specialist Linux and platform engineering expertise
Required
* Extensive experience as a Senior Linux Engineer in secure or mission-critical environments
* Strong expertise with Red Hat Linux system administration
* Solid understanding of networking, storage, and virtualisation technologies (KVM, VMware)
* Proven ability to implement and maintain security controls and respond to cyber and system risks
* Experience operating within highly governed Defence or national security environments
Desirable
* Red Hat Certified Engineer (RHCE), Security+, CISSP, or equivalent certifications
* Experience with monitoring and visualisation tools such as Grafana, Prometheus, and Elastic
* Exposure to OpenStack and large-scale compute or storage environments
* Experience with hybrid cloud platforms (AWS, Azure, or GCP)
* ITIL Foundation certification
Why Profectus
Profectus partners with Defence and government agencies to deliver trusted, secure ICT capability. We take a long-term, relationship-driven approach and support our people throughout the full lifecycle of their engagement.