Managing Security Engineer (DV Cleared)Hemel Hempstead - 5 days onsite 500- 700 per day Inside IR35We''re seeking a DV-cleared Managing Security Engineer to lead the design, implementation, and optimisation of security monitoring platforms feeding into a central SOC. This is a hands-on leadership role focused on building scalable SIEM solutions and strengthening client security posture.Key ResponsibilitiesLead design and deployment of security monitoring tools (Elastic and Splunk)Build and optimise large-scale log ingestion pipelines and data models (ECS/CIM)Develop and tune detection rules using KQL, EQL, and SPLDrive detection engineering lifecycle aligned to MITRE ATTandCKImplement automation, CI/CD, and Infrastructure as Code for SIEM platformsEnsure platform performance, scalability, and resilience (HA/DR, clustering)Collaborate with stakeholders to assess risk and deliver security improvementsEssential Skills and ExperienceProven leadership in Security Engineering and client-facing environmentsStrong hands-on expertise with Elastic Stack and Splunk (Enterprise/ES)Advanced knowledge of SIEM operations, detection engineering, and RBAExperience with large-scale data ingestion, enrichment, and pipeline designFamiliarity with automation tools, SOAR, Terraform/Ansible, and CI/CDExcellent communication, stakeholder management, and problem-solving skillsThis is a great opportunity to play a key role in delivering high-impact cybersecurity solutions while remaining technically h