Security Engineer L3
We are seeking an experienced Security Engineer L3 to provide advanced technical expertise across the design, operation and continual improvement of security services. You will investigate and resolve complex security incidents, lead technical investigations, and support the protection of critical infrastructure, applications, endpoints and cloud environments. The role will involve working closely with infrastructure, development, operations and risk teams to identify vulnerabilities, reduce exposure and strengthen overall security posture.
Key responsibilities will include triaging and responding to high-severity incidents, performing root-cause analysis, developing detection and response use cases, and improving security monitoring across SIEM, EDR, vulnerability management and network security platforms. You will contribute to threat hunting, forensic investigations, incident reporting and post-incident reviews, ensuring that lessons learned are translated into effective preventative controls. You will also provide escalation support to junior engineers, review technical changes, maintain accurate documentation and help develop playbooks, standards and automation to improve the efficiency and consistency of security operations.
Applicants should have substantial experience in a senior security engineering, incident response or security operations role, with a strong understanding of security principles, attack techniques and defensive controls. You will need practical experience with SIEM and EDR technologies, vulnerability assessment, network and endpoint security, identity and access management, and cloud security. Familiarity with scripting or automation, such as Python or PowerShell, is desirable, as is experience working with frameworks including MITRE ATT&CK, NIST or ISO 27001. Relevant professional certifications, such as CISSP, GIAC, CREST or equivalent, would be advantageous. Strong analytical, communication and problem-solving skills are essential, together with the ability to manage competing priorities and remain calm during major incidents.
Security Engineer L3
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