Deadline Date: Thursday 15 January 2026Requirement Title: Principal Solution EngineerLocation: Braine-l'Alleud, BelgiumFull time on-site: Yes Total Scope of the request (hours): 836Required Start Date: 2-FEB-2026End Contract Date: 30-DEC-2026Required Security Clearance: NATO Cosmic Top SecretSpecific Working Conditions: Normal office environment. Possible TDY to other NATO sites within Belgium up to 1 - 2 times per monthDuties and Role:Solution architecture- Leads the development of architectures for complex solutions ensuring consistency with agreed requirements.- Establishes policies, principles and practices for the selection of solution architecture components.- Manages trade-offs and balances functional, service quality and systems management requirements within a significant area of the organisation.- Communicates proposed decisions to stakeholders.- Coordinates and manages the target architecture across multiple projects or initiatives.- Maintains a stable, viable architecture and ensures consistency of design and adherence to appropriate standards across multiple projects or initiatives.Requirements definition and management- Plans and drives scoping, requirements definition and prioritisation activities for large, complex initiatives.- Selects, adopts and adapts appropriate requirements definition and management methods, tools and techniques.- Contributes to the development of organisational methods and standards for requirements management.- Obtains input from, and agreement to requirements from a diverse range of stakeholders.- Negotiates with stakeholders to manage competing priorities and conflicts.- Establishes requirements baselines.- Ensures changes to requirements are investigated and managed.Systems development management- Sets policy and drives adherence to standards for systems development.- Leads activities to make security and privacy integral to systems development.- Identifies and manages the resources necessary for all stages of systems development projects.- Ensures that technical, financial and quality targets are met.Network design- Produces, or approves network providers', network architectures, topologies and configuration databases for own area of responsibility.- Specifies design parameters for network connectivity, capacity, speed, interfacing, security and access, in line with business requirements.- Assesses network-related risks and specifies recovery routines and contingency procedures.- Creates multiple design views to address the different stakeholders' concerns and to handle both functional and on functional requirements.RequirementsCOSMIC TOP SECRET security clearanceEducation, Experience and Training (essential):Education:A Master's degree at a nationally recognised/certified University in a related discipline and 5 years post-related experience. Or a Bachelor's degree with 8 years post related experience.Experience:Proven experience of managing teams of technical personnel; Knowledgeof current and future Mobile Infrastructure (Deployable, Dispersible, Highly mobile CIS) technologies and trends; Experience with design and systems integration ( AC Power distribution equipment, emergency AC Power generation and associated fuel storage, Uninterruptible Power Supply (UPS)); Good understanding of current and future Wireless technologies and trends (to include SATCOM); Experience with Architecture modelling language(s) (UML, SysML, ArchiMate, etc.), preferably in the context of an Architecture Framework (NAFv4, TOGAF, DODAF, Zachman, etc.) and Models Based Systems Engineering (MBSE); Experience in applying quality assurance practices; Sound experience in development, implementation, fielding, testing and maintenance of modern communications equipment; Training/Certifications: ITIL Foundation; PRINCE2 Foundation or equivalent Project Management Framework ( PMP) certification; Experience and Training (desirable):Experience:Knowledge and experience in applying the "NATO Architecture Framework, version 4"; Knowledge and experience in the application of Federated Mission Networking (FMN) in service design; Prior experience of working in an international environment comprising both military and civilian elements; Knowledge of NATO responsibilities and organization, including ACO and ACT; Training/Certifications:PRINCE2 Practitioner or equivalent ( PMP) certification; ArchiMateor TOGAF or equivalent certification;