Site Reliability / DevOp Engineer London - 5 Days OnsiteUp to 550 per day (Umbrella, Inside IR35)12-Month Contract Must hold live and transferrable DV Clearance Are you passionate about reliability, automation, and supporting mission-critical systems? Join this global defence organisation as a Site Reliability Engineer (SRE) and help shape the future of one of the UK''s most vital national security platforms. You''ll be joining a growing SRE team at the heart of the customer''s mission, focused on ensuring performance, availability, and scalability-while driving continuous improvement and innovation. About the RoleAs an SRE, you''ll combine your operational expertise with software engineering skills to minimise manual effort and drive automation across complex systems. This role is perfect for someone who thrives on solving hard problems, automating the mundane, and building intelligent tools to enhance system reliability. Key Responsibilities Support and maintain essential services behind critical applications.Participate in a 24/7 on-call rota (1 week in 5), with extra allowance and overtime.Proactively enhance system availability, performance, and resilience.Develop tools and solutions to automate repetitive tasks and reduce operational toil.Collaborate with development teams to embed best practices and SRE principles.Deploy and manage monitoring systems to provide intelligent observability.Engage with the wider DevOps/SRE community within the organisation. Ideal Skills ..... full job details .....