Job Title: Principal Solution Architect Lead the end-to-end architecture and design of IT solutions within the assigned delivery portfolio of Fulfillment, Assurance, Plan and Build, and drive application portfolio simplification. Collaborate with the Customer''s Enterprise Architect, and contribute to define overall OSS and end state strategy and architecture and alignment with Business Goals. Produce supplementary Solution Architecture roadmaps to further elaborate on the Enterprise Architecture roadmap for given domain to enable specific guidance to the Solution Design. Create reference blueprint/models covering business capabilities, process models, and data models. Ensure IT solutions and architecture artefacts including the Architecture Steer and High Level Architecture are compliant with Business Vision, Enterprise Architecture blueprints and technology and infrastructure roadmaps. Review design artefacts for the OSS solution produced by internal and/or external teams to ensure alignment with the end state architecture, regulatory frameworks, maximises reusability. Facilitate solution alignment across multiple business units, especially where product consumption chains exist, integrating OSS, processes, operations, and network.