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Senior Infrastructure Engineer

Confidential

Farnborough permanent

Posted: March 19, 2026

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Quick Summary

Maintain, improve, and secure SiXworks' multi-classification, virtualised, collaboration and development environments, working with IT infrastructure colleagues to improve SiXworks' 'Secure by Design' capabilities.

Job Description

About the job

We currently have an exciting opportunity for a Senior Infrastructure Engineer to join our existing experienced team.

This role requires the highest level of UK security clearance.

 

What do we look for in a Senior Infrastructure Engineer??

Responsibilities likely to include:

Maintain, improve, and secure SiXworks’ multi-classification, virtualised, collaboration and development environments.

Work with IT infrastructure colleagues to improve SiXworks’ ‘Secure by Design’ capabilities, internally and across its projects.

Provide Infrastructure support to SiXworks’ public cloud SaaS offerings (Office 365) as well as project-based systems (public, private and hybrid clouds) in implementation and support lifecycles.

Perform maintenance tasks on the infrastructure through change control.

Assist with monitoring and management of SiXworks’ and project-based ticketing and alerting systems for new changes and security alerts.

Triage monitoring alerts and perform appropriate action.

Maintain monitoring components in line with infrastructure developments.

Ensure all platforms are patched in line with provider recommendations and SiXworks security policy.

Quickly and accurately assess impact of incidents, initiate return to service and ensure follow up actions are completed.

Identify trends and problems and plan changes to improve stability and performance.

Maintain cutting edge knowledge and skills in the design and build of secure public, private, and hybrid cloud and network technologies.

Develop personal knowledge through study/research toward vocational certifications in relevant technologies/vendors.

Advise customers and project teams on infrastructure and support aspects.

Cascade knowledge through knowledge articles for the team and wider organisation.

Support the SiXworks team in winning business.

Essential Skills and Qualities

Team Player

Windows Server 2016+ administration.

RedHat Openshift

Linux (CentOS/RedHat/Ubuntu)

EUD provisioning (Autopilot), maintenance, patching and hardening.

SSO – concepts and operation.

Understanding of working in protectively marked environments.

VMware

Azure

Networking

Automation (scripting ansible/powershell)

 

Desirable skills:

Kubernetes administration e.g. VMware TKGI

VMware vSphere/vCenter/VCF.

Azure/Microsoft 365 administration.

DevSecOps Tooling

Elastic

Nessus

Application Packaging

HashiCorp Terraform

HashiCorp Vault

Experience working in Agile sprints

About SiXworks

SiXworks is a leading provider of secure digital solutions, specialising in digital experimentation and focused on fail-safe-fast cutting-edge technology solutions deployed in highly secure environments. We are unified in our mission to accelerate innovation and adoption of secure, digital technology to improve the operational agility of Defence and National Security. This is an exciting time for us, we have ambitious plans for continued growth and development, and we are seeking to add brilliant, experienced, motivated, and passionate people to our team to work with us on this journey.

 

Why join SiXworks?

Our team is a fusion of brilliance, featuring senior operational, technical, and business leaders from various industries and the armed forces. We're also powered by a league of extraordinary IT engineers, architects, developers, and project managers. Together, we're an unstoppable force of digital innovation!

SiXworks’ expertise includes Secure-by-Design, cloud computing, advanced network and infrastructure design, rapid application development, cross-security domain systems, multi-tenanted High-Performance Compute, multi-source data platforms, cyber vulnerability mitigation, and intelligence systems. We provide supplier-agnostic, technical, and business consultancy to customers while championing open-source and best-of-breed technologies.

 

What can we offer in return? 

SiXworks offers a unique work culture around our core principles Agility, Security, Innovation, Quality, Collaboration and Inclusivity. 

 

Together, these six principles form SiXworks' NORTH STAR, guiding the organisation towards success. This is reflected in the raft of benefits available to all our employees. 

 

In addition to a competitive salary below are some of our benefits: 

25 days annual leave + bank holidays. 

Private Medical Insurance. 

Life Assurance Scheme 

Pension scheme

Professional Development opportunities.

Cycle to Work scheme. 

Perks at Work scheme. 

Discretionary Bonus scheme.   

 

A word on UK Security Clearance 

Due to the secure nature of the position and working environment, you must have, or be eligible to obtain Security Clearance. 

More details relating to UK Security Clearance can be found here:  

United Kingdom Security Vetting: clearance levels - GOV.UK (www.gov.uk)
 

SiXworks is an IBM subsidiary which has been acquired by IBM and will be integrated into the IBM organisation. SiXworks will be the hiring entity.  By proceeding with this application, you understand that SiXworks will share your personal information with other IBM subsidiaries involved in your recruitment process, wherever these are located. More Information on how IBM protects your personal information, including the safeguards in case of cross-border data transfer, are available here: https://www.ibm.com/privacy

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