We are seeking an experienced Senior Technical Architect to act as a technical authority across complex systems and services. You will play a key role in defining and evolving architectures that balance customer needs, architectural principles, and secure-by-design standards, while influencing strategy and delivery at scale. What You''ll Do Act as the technical authority for systems and services across multiple programmes.Define, evolve, and govern architectures that align customer requirements with security and architectural best practice.Contribute to divisional and business roadmaps, identifying opportunities for technology insertion and innovation.Lead technical reviews, trade-off studies, and risk assessments for major design decisions.Mentor and coach architects and engineers, raising capability across the technical community.Represent the organisation at senior customer forums, technical boards, and industry events.Support business development activities, including technical design, bids, and proposal development.Champion best practice, reuse, and model-based design approaches across the architecture community. Essential Experience Proven experience in system and service architecture within one or more domains (infrastructure, applications, data, networking, cloud).Knowledge of architecture frameworks such as TOGAF, MODAF, or NAF.Knowledge of 3GPP technical standards.Advanced understanding of secure system design principles and cyber security standards.Experience sha