Jobs at SiXworks Limited

Lead and mature the PMO function by strengthening governance, controls, assurance, reporting, risk, change, dependencies, benefits, and financial oversight. The role supports programme delivery, facilitates governance forums and audits, develops a PMO maturity roadmap, provides executive insight, manages PMO staff, and drives process improvement through technology and automation. The successful candidate will work at a fast pace with senior stakeholders and delivery teams in a secure environment.

Monitor a 24/7 security operations center, investigate alerts and intrusions, respond to incidents using playbooks, escalate complex cases, review vulnerability scans and secure configurations, produce security reports, and recommend service improvements. The role also involves tracking emerging threats and collaborating with technical teams to remediate security issues in highly secure environments.

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.

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.

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.

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.

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.

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.