Salary: £65,000 - 91,000 per year Requirements: We require DV clearance. We require proven leadership experience in Security Engineering and client-facing environments. We require strong hands-on expertise with Elastic Stack and Splunk Enterprise/ES. We require advanced knowledge of SIEM operations, detection engineering, and risk-based alerting (RBA). We require experience with large-scale data ingestion, enrichment, and pipeline design. We require familiarity with automation tools, SOAR, Terraform/Ansible, and CI/CD. We require excellent communication, stakeholder management, and problem-solving skills. Responsibilities: We lead the design and deployment of security monitoring tools, including Elastic and Splunk. We build and optimise large-scale log ingestion pipelines and data models, including ECS and CIM. We develop and tune detection rules using KQL, EQL, and SPL. We drive the detection engineering lifecycle aligned to MITRE ATT&CK. We implement automation, CI/CD, and Infrastructure as Code for SIEM platforms. We ensure platform performance, scalability, and resilience, including HA/DR and clustering. We collaborate with stakeholders to assess risk and deliver security improvements. We remain technically hands-on while providing leadership across security engineering activities. Technologies: Ansible CI/CD Security Splunk Terraform More: We are seeking a DV-cleared Managing Security Engineer to join us in Hemel Hempstead, working onsite five days per week. This is an inside IR35 contract paying £500-£700 per day. We offer the opportunity to play a key role in delivering high-impact cybersecurity solutions, leading the design and optimisation of security monitoring platforms that feed into a central SOC while remaining technically hands-on. last updated 19 week of 2026