Jobs at SiXworks Limited

Designs and implements platform capabilities including Kubernetes environments, CI/CD pipelines, monitoring, repository management, automation, and infrastructure as code. Supports on-premise and cloud platforms while improving reliability, security, scalability, and maintainability. The role collaborates with development teams, provides platform best-practice guidance, and drives continuous improvement across secure digital solutions supporting defence and national security missions.

Leads complex technology and digital projects across secure, mission-critical environments. Responsibilities include delivery strategy, multidisciplinary team leadership, service transition, stakeholder engagement, budget and commercial management, risk assurance, customer governance, and mentoring project managers. The role also supports bids, account growth, operational readiness, and delivery recovery while ensuring security, quality, and customer outcomes.

Drive technical direction and strategy for deploying and enhancing secure platforms. Design and build incrementally, support production systems, and balance reliability, performance, and operational excellence in live environments. Collaborate with teams and customers to solve complex challenges in secure, constrained environments. Experience with DevOps tools, cloud platforms, and production environments supporting live users is valued.

Deploys and enhances secure platforms, supports production systems, and balances reliability, performance, and operational excellence. The role involves iterative solution development, troubleshooting, customer collaboration, and operation of cloud-based environments in secure, mission-critical settings. Desired technologies include GitHub Actions, Terraform, Kubernetes, Bash, and cloud platforms. The position is based in Cheltenham with hybrid working and requires eligibility for higher levels of UK Government Security Clearance.

Design, develop, test, and deploy secure applications for defence and national security missions. Build Android applications with Kotlin and Jetpack Compose, backend services using Rust or Go, cloud and IoT integrations, and CI/CD pipelines. Collaborate with customers and teammates, participate in code reviews, create proofs of concept, and deliver reliable software to secure customer environments.

Design and implement data migration activities, including source analysis, migration pipelines, transformations, validation, testing, and deployment. Build data models, reporting datasets, and ETL/ELT pipelines while optimizing performance and refresh schedules. Support dashboard development teams and contribute to secure, mission-critical technology solutions for Defence and National Security organizations.

Business Analysts will elicit and document data migration and reporting requirements, map data sources and flows, define KPIs, support migration workshops, produce specifications, and assist with user acceptance. The role requires experience on technical projects, data migration or reporting, Agile and Waterfall delivery, Jira, and strong communication. Defence or government-sector experience is desirable. The position is mostly remote with occasional travel to Farnborough or Hook and requires existing or obtainable UK security clearance.

Lead the 24/7 Security Operations Centre, overseeing security monitoring, threat detection, incident response, threat hunting, team management, SOC processes, customer relationships, compliance, KPIs, and continuous improvement. The role requires managing analysts, coordinating critical incidents, optimizing SIEM, SOAR, and EDR capabilities, and reporting operational risks and metrics to leadership.

Designs, deploys, and manages secure Azure cloud infrastructure in highly secure environments. Responsibilities include provisioning IaaS and PaaS services, managing AKS and containers, developing Terraform infrastructure as code, implementing identity and network security controls, monitoring system reliability, supporting CI/CD pipelines, and optimizing cloud costs and performance. The role requires collaboration with engineers, architects, and delivery specialists supporting defence and national security missions.

Lead platform engineering initiatives covering Kubernetes, CI/CD, GitOps, infrastructure as code, monitoring, repository management, and automation across on-premise and cloud environments. Improve platform security, reliability, scalability, maintainability, and performance while mentoring engineers, reviewing designs and code, and guiding development teams on platform best practices. The role requires strong Kubernetes, Terraform, Azure, monitoring, version control, and automation experience in secure environments.

Designs, implements, supports, and troubleshoots secure LAN, WAN, data center, firewall, VPN, and network security infrastructure. The role includes routing, SD-WAN, spine-leaf fabrics, EVPN, automation, whitebox networking, NSX, configuration documentation, proof-of-concept work, and customer support in highly secure Defence and National Security environments.

Manages agile technology projects supporting Defence and National Security missions. Responsibilities include project forecasting, change and risk management, coordinating cross-functional teams and vendors, tracking dependencies, managing contracts and suppliers, solving delivery issues, and communicating through reports and dashboards. The role requires structured and agile delivery experience, procurement awareness, and collaboration across technical and business stakeholders.

Designs and executes infrastructure-focused testing for secure digital solutions, covering physical infrastructure, infrastructure as code, virtualized and cloud environments, CI/CD pipelines, resilience, security, and compliance. Responsibilities include creating test strategies, provisioning and validating environments, testing Kubernetes and IaC deployments, maintaining traceability, logging risks, and supporting accreditation and assurance activities in highly governed environments.

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.

Design, deploy, and support platform solutions for secure Defence and National Security environments. Build incrementally (MVP), operate production systems, improve platform reliability and performance across cloud (AWS) and on-prem (VMware). Collaborate with customers and team, mentor, and innovate using tools like Kubernetes, Terraform, and CI/CD.

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.

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.

Design, build, secure and maintain multi-classification virtualised, public/private/hybrid cloud and network infrastructure. Support monitoring, patching, incident triage, automation, DevSecOps tooling, and advise project teams while maintaining security standards and delivering operational support in protected environments.

Design, build, maintain and secure multi-classification virtualised and cloud infrastructures. Support public/private/hybrid cloud systems, monitoring, patching, incident triage, tooling (Elastic, Nessus), Kubernetes, VMware, Terraform/HashiCorp Vault, and advise project teams while developing secure-by-design capabilities.

Design, build and maintain secure software for defence missions, developing Android front-ends in Kotlin Jetpack Compose and backend services in Rust/Python/Go, using Git, Docker and CI/CD, participating in code reviews, POCs, and secure development environments.