Our valued Public Sector client is seeking a S enior IT Technical Architect (10+ Years) to support the design and implementation of a secure digital authentication solution . This role will focus on defining technical architecture, supporting security assessment activities, and producing high-quality architecture artefacts for senior-level review. Tasks: Review business and solution architecture documentation for alignment with enterprise standards Define secure, scalable architecture requirements and technical design artefacts Lead end-to-end technical architecture design, including infrastructure and integration models Identify architectural risks, dependencies, and gaps, and recommend mitigation strategies Support privacy, security, and compliance requirements through architecture reviews Evaluate and recommend technology and integration approaches Prepare and maintain architectural decision records and design documentation Must Haves: Strong experience with security architecture and authentication or identity solutions Experience supporting security assessment and authorization activities Experience with large-scale digital or identity solution implementations Experience producing executive-level architecture deliverables Secret Security Clearance