Role Title: Senior Unix Engineer
Duration: contract to run until 30/11/2026
Location: Knutsford, hybrid 3 days per week onsite
Rate: up to £506 p/d Umbrella inside IR35
Role purpose / summary
The SI Unix Engineer is a senior Unix/Linux infrastructure specialist with a strong focus on platform security, compliance, and stability within highly regulated enterprise environments. The role supports critical Unix/Linux platforms, including legacy and modern systems, and plays a key part in data centre optimisation, migration, and security hardening initiatives.
This position requires deep hands‑on Unix/Linux expertise combined with strong security awareness, operational discipline, and the ability to communicate effectively with global stakeholders.
Key Responsibilities
* Provide L2/L3 support for Unix/Linux infrastructure platforms in production, including business critical and regulated systems
* Perform secure build, configuration, hardening, and ongoing maintenance of Unix/Linux servers
* Support data centre optimisation, migration, and transformation programmes, including platform stabilisation and risk reduction activities
* Implement and maintain security controls, including access management, patching, vulnerability remediation, and configuration compliance
* Participate in incident, problem, and change management, ensuring adherence to ITIL and security governance standards
* Support audit, risk, and compliance activities, including evidence gathering and remediation of audit findings
* Work closely with security, platform, and architecture teams to ensure platforms meet enterprise security and operational standards
* Create and maintain technical documentation, runbooks, and operational procedures
* Contribute to continuous improvement initiatives to enhance platform reliability, security, and operational efficiency
Technical Skills & Experience (Essential)
* Strong hands‑on experience administering Unix/Linux platforms in large enterprise environments
o Linux (RHEL, Oracle Linux, SUSE or equivalent)
o Unix variants (e.g. AIX, Solaris, HP UX or equivalent legacy platforms)
* Solid experience with system hardening and security best practices on Unix/Linux
* Strong understanding of:
o OS patching and lifecycle management
o User and privilege management (sudo, PAM, RBAC)
o File system, storage, and performance management
o Process monitoring, troubleshooting, and root cause analysis
* Experience working in regulated or security sensitive environments (e.g. banking, financial services, critical infrastructure)
* Familiarity with vulnerability management, security scanning, and remediation processes
* Experience supporting data centre migration or transformation programmes is highly desirable
* Working knowledge of ITIL processes (incident, problem, change)
Certifications (Preferred, not mandatory)
* Red Hat
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