Salary: £30,000 - 30,000 per year Requirements: Must be eligible for SC Clearance (UK resident for the last 5 years) Strong understanding of SIEM tools and attacker behaviours Hands-on experience with O365, M365, and Azure security administration PowerShell scripting capability Experience working with firewalls, IDS, WAF, network segmentation, and wider security controls Broad technical knowledge spanning Windows, networking, IAM, monitoring, antivirus, and modern architectures Ability to explain complex concepts clearly to both technical and non-technical audiences Ability to turn policy or regulatory requirements into meaningful technical solutions Experience writing technical design documents Experience with Azure Sentinel, AlienVault, AWS or GCP security controls (preferred but not essential) Experience with Linux, data storage, or scripting in Python or Bash (preferred but not essential) Responsibilities: Take ownership of SOC tooling, focusing primarily on the SIEM platform Implement SIEM solutions into customer environments and tune data feeds effectively Work closely with the SOC to maintain and continuously improve SIEM rulesets and use cases Provide expert cyber guidance and technical leadership to customers Support major security incidents and play an active role in investigation and response Deliver cyber-led project work, either independently or as part of wider Professional Services engagements Stay ahead of emerging technologies and contribute to future security tooling roadmaps Technologies: AWS Azure Bash GCP IAM Support Linux Network PowerShell Python Security WAF Windows Office 365 Cloud More: Join our team at Littlefish, based in Nottingham or Sheffield with a hybrid work model, where we are committed to fostering an inclusive community that values diverse backgrounds. As we expand, we welcome individuals who are confident, curious, collaborative, and passionate about enhancing security for our clients. We offer a unique training programme through the Littlefish Academy, a referral bonus scheme, health benefits, a casual dress policy, a company pension scheme, and 25 days of annual leave plus public holidays. Our values emphasize high performance, passion, and a can-do attitude, making Littlefish an exciting place to grow your career. If you are ready to make a tangible difference in Cyber Security, we encourage you to apply today! last updated 16 week of 2026