Jobs at SiXworks Limited

Provide PMO support for programme delivery: maintain programme data, governance, RAID logs, resource coordination, meeting facilitation, quality control, and event coordination. Produce status reports, support recruitment/onboarding, manage timesheets and utilisation forecasting, and act as stakeholder liaison across workstreams to ensure actions are captured and tracked to completion.

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.

Produce and maintain user manuals, system documentation, procedures and training materials that comply with ACP and NATO STANAGs. Collaborate with engineers and Defence stakeholders, manage document lifecycle and version control, translate technical specs into user-focused documentation, and ensure classification, security and interoperability compliance.

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.

Design, configure and maintain cloud-native and traditional networking for air-gapped Kubernetes and cloud platforms. Troubleshoot cross-cluster communications, implement secure virtual networking, automate network operations, and participate in an on-call rotation to ensure reliability and performance.

Manage the full contract lifecycle for MoD/defence contracts: negotiate, award, ensure compliance (ITAR/EAR/DEFCONs), oversee performance, manage risk, support bids/tenders, resolve disputes, and report to senior management.

Design, build, and maintain secure Azure infrastructure and hybrid/multi-cloud connectivity. Configure and manage AKS/Kubernetes, networking (BGP, VPN, Virtual WAN), security controls, CI/CD pipelines, IaC (Terraform/Packer/Vault), monitoring, and automation. Support on-prem and cloud platforms, manage repositories, guide development teams, and improve platform maintainability and scalability.

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.

Lead and grow an MoD-focused account: develop business and go-to-market strategy, engage MOD stakeholders, identify growth opportunities, maintain client relationships, drive capability development, and lead a high-performing account team while supporting BD and commercial activities.

Lead delivery and evolution of an internal secure IT platform for Defence customers. Manage project lifecycles, governance, budgets, risks, and contracts. Plan and resource technical projects, apply appropriate methodologies (Agile/Waterfall), engage stakeholders, lead multi-disciplinary teams, and contribute to strategy and innovation.

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.

Provide first-line support and incident triage for secure digital solutions: respond to tickets/calls, engage users, escalate to 2nd/3rd line, onboard/offboard users, manage accounts and permissions, build/deploy/troubleshoot end-user devices, and test/track physical assets including servers and EUDs.

Design, build, and operate secure platform infrastructure and CI/CD pipelines using IaC and automation. Deliver, upgrade and harden core platforms, create architecture/design artefacts and proofs‑of‑concept, mentor junior engineers, and ensure security, compliance and operational readiness in highly secure environments.