Infrastructure Test Engineer

Job Title: Infrastructure Test Engineer (Defence / Secure Infrastructure) Location: Corsham - Onsite Term: 9 Months

Ir35: Inside

Day Rate: £DOE

• **Security Clearance*** - Current & Valid UK SC Required to be considered for this opening

The Opportunity

We are seeking an experienced Test Engineer to support a high-profile defence programme.

This is a hands-on testing role working across infrastructure, networking, security, identity and interoperability, supporting the verification, validation and acceptance of a complex capability within a secure and regulated defence environment.

You will play a key role throughout the testing lifecycle, from developing test scenarios and scripts through to execution, evidence gathering, defect management, demonstrations and formal acceptance.

Key Responsibilities

Develop, maintain and execute test scripts supporting verification, validation and acceptance activities. Support the development and execution of the V&V plan. Develop and execute functional, non-functional, integration, interoperability and regression testing. Test infrastructure, networking, security, identity and policy-enforcement capabilities. Support interoperability testing between OpNET, partner systems and FMN-aligned services. Validate information-sharing, policy controls, auditability and traceability requirements. Support testing of IAM, FIAM, PKI and trust services. Produce test plans, procedures, scripts, evidence packs, defect reports and test reports. Capture and manage defects, supporting investigation, root-cause analysis and resolution. Support the installation, configuration and validation of test and demonstration environments. Work closely with architects, engineers and security specialists to support system integration and validation. Maintain robust test evidence for assurance, compliance, acceptance and audit purposes. Support FMN Spiral 6 compliance activities and Authority-witnessed demonstrations. Document test outcomes, lessons learned and recommendations. Contribute to continuous improvement of test processes, tools and methodologies. Deliver testing activities in line with programme milestones, configuration controls and security requirements.What We Are Looking For

Strong commercial experience in Test Engineering, including test planning, scripting, execution and reporting. Experience producing comprehensive test documentation and evidence. Strong functional, non-functional, integration and regression testing experience. Experience supporting V&V, acceptance or assurance activities within complex enterprise or infrastructure environments. Good understanding of systems integration and end-to-end service validation. Experience testing infrastructure, networks, security or identity management solutions. Knowledge of IAM, including authentication, authorisation and RBAC. Understanding of PKI, digital certificates and certificate-based trust. Experience working within secure, regulated or highly controlled environments. Strong analytical, troubleshooting and stakeholder communication skills. Ability to manage competing priorities and deliver against demanding programme timelines. Experience working within Agile, Waterfall or other structured delivery environments. Good working knowledge of Microsoft Office.Desirable Experience

Defence, NATO or coalition interoperability testing. Federated Mission Networking (FMN), particularly Spiral 6. Data Centric Interoperability (DCI) or secure information-sharing capabilities. Federated Identity and Access Management (FIAM). Data Centric Security, policy enforcement and metadata-based information controls. PKI implementations and certificate-based authentication. VMware, VDI or multi-tenant environments. Military information systems, Defence Digital, OpNET or NSoIT(D). Jira and Confluence. Formal verification, validation, demonstration and acceptance activities. ISTQB, Security+, VMware VCP or equivalent qualifications. SAFe and/or Waterfall methodologies.

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