Jobs at SiXworks Limited

Manage ongoing security and compliance for internal infrastructure: perform cyber risk assessments, develop security policies and documentation, ensure system designs meet security outcomes, produce evidence for MOD regulations, advise project teams, and report cyber risks and compliance status to senior management.

Lead development and maintenance of information security, risk management, and compliance frameworks. Oversee incident response, vulnerability assessments, penetration testing, audits, and assurance reporting. Ensure alignment with standards (ISO 27001, Cyber Essentials, JSPs), GDPR compliance, governance, stakeholder engagement, training, and business continuity. Manage security resources and support secure-by-design throughout system lifecycles.

Design, build, and maintain secure infrastructure and tooling for mission-critical environments. Deploy and manage Kubernetes-based platforms, SIEM (Splunk), vulnerability scanning (Nessus), EDR and observability (fluentbit). Integrate security into CI/CD pipelines, automate security processes with scripting/IaC, document configurations, and collaborate with engineering and DevOps to embed DevSecOps practices and threat detection.

Design and deliver secure digital solutions for defence clients. Perform cyber risk assessments, produce risk treatment plans, support compliance and assurance activities, create security documentation, and liaise with MOD stakeholders to translate technical risks into business language.

Operate and maintain privileged-access and identity tooling in highly secure Defence environments: manage credential lifecycles, run discovery scans, ensure RPC and backups, monitor engines and sessions, generate audit reports, apply patches, troubleshoot network components, and integrate alerts with SIEM to detect suspicious activity.

Lead security architecture and secure delivery for MOD and internal projects. Support agile teams to design and deliver secure Kubernetes/cloud environments, perform risk management, produce assurance artefacts to meet MOD regulations, design mitigations, and collaborate with engineering, DevSecOps and cyber teams to implement secure-by-design solutions.

Design and deliver secure architectures for MOD and internal projects, support agile teams deploying Kubernetes and cloud services, conduct threat assessments, manage security risk, produce regulatory evidence, and work across engineering and DevSecOps teams to ensure secure-by-design delivery.

Define and evolve platform architecture and strategy, design secure scalable infrastructure, lead CI/CD and IaC automation, govern architecture decisions, mentor platform engineers, promote DevOps/SRE practices, and ensure platform security, compliance and operational resilience for Defence/National Security solutions.

Design, develop and commission automation solutions alongside architects and SMEs. Implement infrastructure-as-code, scripting, CI/CD, and platform automation; support system integration, validation, security compliance, and technical documentation in a secure defence-focused environment.

Lead delivery of secure digital solutions for Defence and National Security. Manage project forecasting, change and risk, oversee cross-functional deliverables and suppliers, apply structured and agile methodologies, produce stakeholder reports/dashboards, and ensure contract and supplier management within high-security environments.

Support project delivery and finances for secure defence-focused digital projects. Assist forecasting, change and risk management, vendor and contract activities, reporting, and cross-team collaboration to ensure successful delivery.

Work with engineers, architects, and delivery teams to gather and document functional and non-functional requirements, design secure platforms, apply industry methodologies, use data analytics to inform decisions, liaise between IT and stakeholders, mentor junior staff, and support delivery of mission-critical digital solutions in highly secure defence environments.

Provide 1st/2nd line support for secure Defence/National Security environments: respond to tickets and alerts, desk-side and remote end-user support, escalate complex issues, document incident resolutions, communicate incidents and maintenance, provision devices and onboard users, and support infrastructure and services with occasional site travel.

Lead and line-manage infrastructure engineers across cloud (Azure/GCP), networking, servers, end-user compute and automation. Balance people leadership, recruitment, capacity planning and technical delivery, including architecture reviews, process improvement and stakeholder communication in secure/mission-critical environments.

Design, build, and deliver secure digital solutions for defence environments. Collaborate with engineers and architects to implement cloud-based systems (AWS/Azure), responsive front-ends (React/TypeScript), scalable backends (Java/Python/Go), containerised deployments (Docker, Kubernetes), and automated CI/CD pipelines while following security best practices and participating in code reviews.

Provide 1st/2nd line support for secure environments: respond to tickets and alerts, perform end-user and remote desk-side support, manage device provisioning, document incident resolutions, escalate complex issues, and communicate incidents and maintenance to user communities. Occasional travel to remote sites may be required.

Ensure quality, reliability, and security of physical and IaC-based infrastructure by analysing requirements, designing test strategies, provisioning and validating environments, executing functional/integration/regression/resilience/security tests, managing defects, and supporting accreditation, assurance, and compliance activities.

Provide day-to-day office and facilities management, support office setups/relocations, coordinate suppliers, manage visitor and reception cover, oversee health & safety and workplace services, organise employee events and internal communications, and deliver general administrative and HR support including payroll/benefits recordkeeping.

Design, build and deliver secure DevSecOps solutions for defence environments. Translate security standards into automated code, develop UI and cloud/container workloads, implement CI/CD, automate orchestration, participate in code reviews, and support Apps, Platform and Workload pillars while following secure engineering best practices.

Manage and develop a large platform engineering team: line management, career development, resourcing, recruitment, capacity planning, and operational oversight. Coordinate with Principal Platform Architect, operations and project managers to align skills to priorities, ensure delivery excellence, secure funding for tools, and communicate resource risks and constraints across stakeholders in a secure defence-focused environment.