Senior Systems Integration & Release Engineer

GXM is seeking a full-time Senior Systems Integration & Release Engineer to support the technical integration, engineering coordination, verification, and release readiness of complex enterprise digital platforms within a NATO multinational environment.

The ideal candidate will possess strong technical expertise in enterprise systems integration, cloud-based platforms, APIs, data exchange, identity services, DevSecOps, and software release management. This individual will work closely with technical delivery lead, engineering teams, cybersecurity stakeholders, and multiple technology suppliers to ensure that integrated system components meet technical requirements, interoperability standards, quality expectations, and operational readiness criteria.

This position is responsible for coordinating and assessing technical integration activities, identifying and resolving cross-system dependencies, reviewing engineering and testing evidence, and supporting the successful transition of enterprise capabilities into operational environments.

The individual will work closely with the Senior Technical Delivery Lead to maintain technical delivery alignment, integration visibility, and release confidence across multiple engineering teams and external suppliers.

This role is based in London, United Kingdom. Hybrid flexibility may be available based on mission requirements, stakeholder engagement, and achievement of program objectives. Travel may be required.

Responsibilities

• Lead and coordinate systems integration and technical assurance activities across complex enterprise applications, cloud platforms, shared services, and supporting infrastructure.

• Support the technical integration of multiple vendor-developed applications, enterprise services, APIs, data interfaces, identity services, and platform capabilities.

• Develop, maintain, and review interface control documentation, integration specifications, system interaction diagrams, data flow diagrams, and technical dependency registers.

• Coordinate integration activities across internal engineering teams, external technology suppliers, cybersecurity specialists, and infrastructure providers.

• Identify and track technical dependencies, interface requirements, integration risks, engineering constraints, and cross-supplier delivery issues.

• Review integration architectures, technical designs, implementation approaches, and engineering artifacts to assess interoperability, feasibility, and compliance with approved architectural standards.

• Support technical delivery planning by assessing integration sequencing, engineering dependencies, technical milestones, and implementation readiness.

• Coordinate technical integration reviews, engineering working groups, interface discussions, and cross-supplier technical issue resolution.

• Evaluate the quality and completeness of supplier-provided engineering documentation, integration evidence, and technical test results.

• Support verification and validation activities by reviewing system integration testing, functional testing, automated testing, performance testing, and technical acceptance evidence.

• Develop and maintain technical release-readiness criteria, including integration completion, testing evidence, defect status, security dependencies, operational supportability, and deployment preparedness.

• Conduct technical readiness assessments and provide documented recommendations regarding system integration, deployment risks, release constraints, and corrective actions.

• Coordinate the identification, tracking, and resolution of technical defects, integration failures, and engineering issues that affect release readiness.

• Assess non-functional requirements, including system performance, resilience, capacity, availability, interoperability, observability, and maintainability.

• Support DevSecOps integration practices, including CI/CD pipelines, automated testing, configuration management, controlled deployments, and release management.

• Review technical aspects of deployment planning, rollback procedures, operational transition, and post-release validation.

• Maintain integration registers, technical risk assessments, engineering action logs, release-readiness reports, and supporting technical documentation.

• Collaborate with enterprise architects, technical leads, product managers, program managers, and cybersecurity stakeholders to ensure integration activities align with approved technical and operational requirements.

• Support technical knowledge transfer, engineering documentation, and continuous improvement activities to ensure sustainable integration and release management practices.