SIEM Analyst (Cyber Threat Detection) - SANS/GIAC x2

SIEM Analyst / Cyber Threat Detection Analyst - SANS/GIAC

Cyber Threat Detection Analyst

Location: Wokingham, Berkshire (On-site)

Salary: Competitive (dependent on experience) + excellent benefits & training

Security Clearance: Ideally SC Cleared or eligible for SC

Role Overview

As a SIEM Analyst Cyber Threat Detection, you will play a hands-on role within an advanced cyber defence function, focused on proactive threat hunting, adversary behaviour analysis, and high-fidelity threat detection across enterprise environments.

This role goes beyond reactive alert handling. You will actively hunt for malicious activity using telemetry, SIEM data, and threat intelligence, develop hypotheses based on MITRE ATT&CK Tactics, Techniques, and Procedures (TTPs), and support incident management and response activities when threats are identified.

We are open to experienced SOC Analysts where threat hunting, investigations, and proactive detection have formed a significant part of their role, and who are looking to further develop in a more hunting-led environment.

This position is well suited to analysts who enjoy thinking like an attacker, have worked alongside or supported red team or purple team activities, and want to deepen their expertise in threat detection and detection engineering.

Skills & Experience We're Seeking

Experience in threat hunting, cyber threat detection, SOC, blue team, or cyber defence environments, with ideally around five years hands on experience.

Strong hands-on experience using SIEM platforms, including:

Microsoft Sentinel (KQL)

Splunk (SPL)

Elastic Security/Kibana (KQL, ESQL)

Practical and operational understanding of MITRE ATT&CK, attacker techniques, and adversary tradecraft

Experience working with Indicators of Compromise (IOCs) and threat intelligence feeds

Solid experience across the security event life cycle, including detection, investigation, and incident management

Hands-on experience with EDR/XDR technologies such as Microsoft Defender, CrowdStrike, SentinelOne, or Carbon Black

Strong knowledge of networking fundamentals (TCP/IP, DNS, HTTP/S, Firewalls, VPNs, Proxy technologies)

Experience analysing telemetry from Windows, Linux, identity, endpoint, and network sources

Strong analytical mindset with the ability to clearly communicate findings, impact, and riskKey Responsibilities

Conduct proactive threat hunting activities across log, endpoint, and network telemetry to identify suspicious, stealthy, or previously unknown threats

Develop and execute hunt hypotheses aligned to MITRE ATT&CK TTPs, adversary behaviours, and emerging threat intelligence

Write, refine, and optimise SIEM queries using KQL, SPL, Elastic/ESQL, and Kibana Query Language

Perform IOC analysis, enrichment, and validation, integrating internal and external threat intelligence sources

Lead investigations from initial detection through scoping, root cause analysis, and impact assessment

Support incident management and incident response activities, including containment, remediation, escalation, and lessons learned

Collaborate closely with SOC teams, incident responders, red teams, and purple teams to validate detections and improve defensive coverage

Contribute to detection logic improvements, use-case development, and continuous enhancement of hunting methodologies

Produce clear investigation write-ups, timelines, and recommendations for technical and non-technical stakeholdersSecurity Certifications (Highly Beneficial)

SANS/GIAC certifications, including but not limited to:

GCIH - Incident Handler

GCIA - Intrusion Analyst

GCED - Enterprise Defender

GCTI - Cyber Threat Intelligence

GMON - Continuous Monitoring

GDAT - Defending Advanced Threats

GCAT - Advanced Threat Intelligence

OSCP or equivalent offensive security qualifications

Crest certifications, such as:

Crest Practitioner Intrusion Analyst (CPIA)

Crest Registered Intrusion Analyst (CRIA)

Crest Certified Threat Intelligence Analyst (CCTIA)

Crest Certified Blue Team Professional (CCBTP)

Microsoft SC-200 or related detection and response certifications

Other recognised cyber security or threat intelligence credentials