Halian Technology is searching for a skilled NetworkSecurity Engineer to join our client's Infrastructure team to help secure the systems and data powering cutting-edge analytics across pensions, energy, health, and financial services. This is a fantastic opportunity to work with an award-winning consultancy that fuses human expertise with advanced technology to shape a more positive future. Based in either London or Winchester, you'll play a critical role in protecting our clients cloud and physical infrastructure by developing and maintaining scalable, proactive security controls, processes, and tools. Key Responsibilities: Secure physical and Microsoft Azure cloud infrastructure using modern, risk-based approaches. Design, implement, and maintain security controls, templates, and baselines for cloud environments. Automate repetitive tasks to enhance security efficiency and consistency. Deploy and manage tools such as Microsoft Defender for Cloud, Defender for Endpoint, and Nessus. Collaborate with our outsourced SOC team to enhance Sentinel SIEM, runbooks, and threat detection. Lead investigations into security incidents and conduct proactive threat hunting. Manage endpoint security, patching, vulnerability scanning, and system hardening. Support audits and compliance with Cyber Essentials Plus, ISO 27001, and other frameworks. Partner with DevOps, InfoSec, and platform teams to drive secure coding and infrastructure practices. Participate in a 1-in-6 on-call rota after completing probation. Key Requirements: Hands-on knowledge of SIEM platforms (preferably Sentinel), EDR, and vulnerability management. Familiarity with frameworks like Cyber Essentials Plus and ISO 27001. Experience in securing hybrid cloud environments (Microsoft Azure desirable). Experience in DevOps environments with secure automation and monitoring. Proficiency in endpoint security, compliance audits, and patch management. Solid troubleshooting skills with the ability to own and resolve security issues. Understanding of secure infrastructure design, networks, and identity management. Location : London or Winchester hybrid (2 days in office) Salary : £70,000£75,000 depending on experience Apply now to be part of an ambitious, people-first organisation securing the technology behind smarter decisions and a better future. *You must be UK-based and have the right to work in the UK to be considered for this role.* ADZN1_UKTJ