Jobs at SiXworks Limited

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.

Provides PMO support across programme governance, reporting, resource coordination, RAID management, quality audits, meeting facilitation, and event coordination. Maintains programme data integrity, tracks actions and dependencies, supports recruitment and onboarding, and assists Project Managers and technical leads across changing priorities. The role requires strong organisation, communication, attention to detail, Microsoft Office proficiency, and ideally experience with Jira, Confluence, or MS Project.

Monitor and protect secure digital environments in a 24/7 SOC. Responsibilities include leading shifts, overseeing junior analysts, detecting and responding to security incidents, escalating complex cases, reviewing vulnerabilities and secure configurations, maintaining security controls, producing reports, and recommending service improvements. The role requires knowledge of incident and vulnerability management, cloud computing, information security, identity and access management, security risks, and common cyber threats.

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.

Lead account and business growth activities within Defence (MOD) accounts: identify and convert opportunities, engage stakeholders, maintain trusted relationships, support leadership and delivery, and drive innovation and profitable growth for the business.

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.

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.

Designs, deploys, and documents secure digital solutions for defence and national security environments. Responsibilities include managing vulnerabilities, configuring SIEM and EDR tools, hardening information systems, integrating security testing into CI/CD pipelines, managing identity and access solutions, developing SOC playbooks, and supporting secure-by-design delivery using Agile and DevSecOps practices.

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.