On behalf of Sellafield, we are looking for a Security Architect X3 (Outside IR35) for a 12 Month contract based Hybrid in Warrington. Work at Sellafield Ltd, and you''re not just building a career. You''re embarking on a mission. Joining 11,000 people on a 100-year project transforming the Sellafield site for all the generations that follow. We have the site at Sellafield (West Cumbria) and our office at Risley (near Warrington). Join us and you''ll work shoulder-to-shoulder with industry-leading - sometimes world-leading - experts. There are generations and generations of knowledge here and people are only too willing to share it. Our culture of continuous improvement is underpinned by commitment to professional and personal development few can match. Our relentless pursuit of excellence is reflected in our health, safety, security, resilience, and environmental performance standards as well as the quality of the products and services we deliver to our customers. As a Security Architect, your main responsibilities will be:. End-to-end production and formal approval of technical and procedural control standards fully aligned to NIST 800-53.. Work closely with technical SMEs, system owners, and governance teams to ensure that every control is practical, unambiguous, and aligned with existing processes, or clearly highlights where new processes need to be introduced. Work closely with stakeholders to ensure that each standard is developed collaboratively, reviewed thoroughly,