Senior Support Engineer, Application and CIS Security

• Design and run proofs of concept and produce evidence-based recommendations covering cost, operational impact, lock-in and exit strategy
• Define secure-by-design reference architectures, patterns and hardening baselines; review service designs at architecture gates
• Lead threat modelling, own technical risk register entries, propose mitigations and track remediation
• Support deployment of Windows and Linux server applications
• Integrate applications with identity providers
• Support creation and deployment of client applications on end-user workstations
• Gather and report metrics and KPIs
• Support in-service operations and assigned NATO, local command and Atlassian systems
• Maintain operational and support environments; monitor application performance
• Support CIS Support Units and other staff with daily system operations
• Manage EntraID groups and roles and configure Azure/AWS cloud components
• Deploy, configure and support AI-based solutions, tools and agents
• Support COTS-AI integration in production and coordinate monitoring and maintenance
• Troubleshoot and resolve complex software problems
• Monitor helpdesk incident management, ticket updates and service-level resolution
• Escalate complex issues to vendors or appropriate teams and follow up through resolution
• Create and maintain knowledge-base documentation and share best practices
• Analyze and document requirements and change requests; review technical documentation
• Control access to restricted areas and ensure software/hardware functionality and security
• Monitor COTS applications and report infrastructure, hardware and software issues
• Support security approval/accreditation and compliance with NCIA/NATO regulations
• Gather functional/non-functional requirements and draft system specifications
• Support technical reviews, walkthroughs, audits, change/configuration management, releases, deployments and testing
• Provide input to service, project and portfolio managers and collaborate with NCIA and vendors

Requirements

• Deep understanding of end-user devices running Windows OS, Android OS and Apple iPhones/iPads
• Expert knowledge of Linux, Windows and Active Directory
• Expert knowledge of Microsoft SQL Server 2019-2025 and IIS-based web applications
• Very good understanding and experience with AI/LLM
• Deep understanding of networking infrastructure
• Very good knowledge of AWS and Azure cloud technologies and deployment
• Deep understanding of PKI, certificate management and post-quantum migration
• Expertise in at least four specified software engineering technologies and standards, including HTML5, REST & Web Services, XML, HTTP, SQL, Visual Basic for Applications, OAuth, OIDC, SAML2, .NET/C#, Java and JavaScript
• Deep understanding of security constraints and requirements in CIS
• Deep understanding of NCIA and NATO security directives, regulations, industry best practices and standards
• Familiarity with Outlook, Teams and SharePoint
• Experience with IIS, JBOSS, Apache Tomcat and .NET-based applications
• Extensive experience deploying and managing client-server applications, application integration and data transformation
• Strong technical skills investigating, diagnosing and resolving complex IT issues
• Excellent verbal and written communication skills
• Full proficiency in English; French proficiency advantageous
• Ability to communicate technical information to non-technical users
• Ability to work in cross-functional application management/deployment teams
• Strong customer service focus and commitment to user satisfaction
• Ability to manage multiple projects/activities and prioritize tasks
• Attention to detail in documentation and record keeping
• At least 10 years of relevant experience in computer science or electronic engineering
• Very good knowledge of software engineering areas including requirements management, software change management and testing, secure software engineering, configuration management and application lifecycle management
• Ability to work effectively in a team and share knowledge/resources
• Willingness to collaborate on complex issues
• Strong customer relationship skills, including negotiating complex and sensitive situations under pressure
• NATO nation nationality
• NATO Secret Security Clearance or national equivalent
• Prior experience in an international environment