Platform Engineer

Work on Technology That Protects What Matters

At SiXworks , we build secure digital solutions that support Defence and National Security missions . Our teams work on complex problems where reliability, security, and speed of innovation matter.

We’re looking for a Platform Engineer who enjoys solving difficult technical challenges and wants their work to have real operational impact.

What You’ll Do

As a Platform Engineer, you’ll help design, build, and deliver secure digital solutions in highly secure environments. You’ll work alongside engineers, architects, and delivery specialists to develop technology that enables faster, safer decision-making for critical operations.

Your work may include:

Platform Engineering & Automation

• Design, build, and improve CI/CD pipelines to support secure, scalable, and efficient delivery.
• Develop and maintain automation tooling and Infrastructure‑as‑Code solutions (e.g., Terraform, Ansible).
• Champion automation initiatives to reduce manual effort and improve consistency across environments.
• Support the delivery, upgrade, and maintenance of core platforms, systems, and services.

Architecture, Design & Delivery

• Participate in the architecture and design of new deployments, services, and platform features.
• Create proof‑of‑concepts for new technologies and guide them through to production readiness.
• Produce high‑quality documentation, diagrams, and design artefacts.

Collaboration & Enablement

• Work closely with development, QA, operations, and support teams to ensure smooth integration and delivery.
• Provide guidance on platform usage, best practices, and DevOps principles.
• Mentor more junior engineers and contribute to a culture of continuous learning and improvement.

Security & Compliance

• Apply secure‑by‑design principles throughout the platform lifecycle.
• Conduct vulnerability assessments and contribute to hardening activities.
• Ensure non‑functional requirements (security, scalability, maintainability) are met.

What We’re Looking For

We value people who take ownership, think critically, and enjoy working as part of a collaborative team tackling complex challenges. You don’t need to tick every box, but we’re particularly interested in people with skills/experience in:

• Working in Agile or DevOps‑Oriented environments.
• Strong documentation skills (e.g., Confluence, Sharepoint).
• Strong collaboration skills
• Ability to learn new technologies quickly in a fast-paced environment
• Linux and/or Windows administration.
• Scripting and development skills
• Ability to work under pressure
• CI/CD tooling (GitLab CI/CD, Jenkins, GitHub Actions, etc.).
• Infrastructure as Code (Terraform, Ansible, DSC, ARM templates).
• Containerisation and orchestration (Docker, Kubernetes, Podman).
• Git workflows, repository management, and configuration‑as‑code practices.
• Scripting languages such as Bash, Python, PowerShell, or PHP.

Just as important are curiosity, strong problem solving ability, and the motivation to continuously improve how technology is designed and delivered.

About SiXworks

SiXworks is a specialist digital innovation partner delivering secure, mission-critical technology to Defence and National Security organisations. We focus on digital experimentation, secure-by-design architecture, cloud technologies, and rapid application development to help our customers move faster and stay ahead of evolving challenges.

Our team combines expertise from across technology, business, and operational backgrounds including the armed forces creating a collaborative environment where practical thinking and innovation thrive.

Why Join Us

Our culture is guided by six principles: Agility, Security, Innovation, Quality, Collaboration and Inclusivity our North Star for how we work. 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.

As an end-to-end digital innovation and delivery partner, we turn complex challenges into mission-critical digital advantages. This is a thrilling time for us, with ambitious plans for growth. We are looking for brilliant, experienced, driven and self-motivated people to join the team on our journey.

We offer competitive salaries and a package that supports your wellbeing and development, including 25 days annual leave + bank holidays, free Private Medical cover and Life Assurance, Generous pension (10% employer, 5% employee contribution), Bonus and Professional development and training support. In addition to secure parking, gym, café & restaurant on site and lots of open break out spaces.

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)

Interested?

Please apply: https://sixworks.bamboohr.com/careers/290