Security Engineer - SIEM

Security Engineer - SIEM - sought by investment bank based in London - Contract - Hybrid

*Inside IR35 - umbrella*

Key Responsibilities

  • SIEM Management & Optimization:
    • Design, implement, and maintain Microsoft Sentinel workspaces, connectors, analytics rules, and playbooks
    • Develop advanced KQL queries for threat hunting and reporting
    • Optimize SIEM performance, cost, and data retention policies
    • Troubleshoot log ingestion and parsing issues
  • Log Source Integration:
    • Onboard and configure critical log sources (AD, firewalls, servers, cloud infrastructure)
    • Manage event collection and forwarding infrastructure
    • Implement data filtering and custom log parsing
  • Threat Detection & Use Case Development:
    • Develop and refine detection rules based on threat intelligence and attack patterns
    • Continuously improve detection efficacy and reduce false positives
  • Security Monitoring & Incident Response:
    • Monitor systems for anomalies and malicious activity
    • Contribute to threat hunting and incident response playbooks
    • Provide expert guidance on securing applications and infrastructure
  • Security Advisory & Innovation:
    • Support PoCs for new security tools
    • Help define and measure control effectiveness

Required Skills & Experience

  • 3+ years in a Security Engineer, SOC Analyst, or similar role
  • Hands-on experience with Microsoft Sentinel and KQL
  • Strong knowledge of Active Directory, Windows/Linux systems, and cloud platforms (Azure, AWS, GCP)
  • Proficiency in scripting (PowerShell, Python)
  • Familiarity with security frameworks (MITRE ATT&CK, NIST, Kill Chain)
  • Experience with EDR, DLP, Proxy, and SEG tools

Desirable Qualifications

  • Certifications: AZ-500, SC-200, SC-900, CompTIA Security+, CISSP, GCIA, GCIH, GCFA, CCSP
  • Experience with SOAR playbooks, YARA rules, STIX, and YAML
  • Participation in red/purple team exercises

Please apply within for further details - Matt Holmes, Harvey Nash

Company
Harvey Nash
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Salary
£600 - £720 per day
Posted
Company
Harvey Nash
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Salary
£600 - £720 per day
Posted