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 risk Key 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 stakeholders Security 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
Jun 05, 2026
Full time
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 risk Key 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 stakeholders Security 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
Cyber Threat Detection / SIEM 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 Cyber Threat Detection Analyst, 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 risk Key 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 stakeholders Security 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
Jun 05, 2026
Full time
Cyber Threat Detection / SIEM 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 Cyber Threat Detection Analyst, 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 risk Key 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 stakeholders Security 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
Security Monitoring & SIEM Analyst Location: Berkshire (Onsite) Salary: 45,000 - 60,000 + excellent benefits & training Security Clearance: Ideally SC Cleared or eligible for SC (UK Nationals only) Company Overview An exciting opportunity to join a global technology organisation with a well-established cyber security capability supporting mission-critical environments. Cyber security is central to the organisation's strategy, with ongoing investment in tooling, threat intelligence, and specialist talent. The security function operates at a mature level, combining Security Operations, threat detection, incident response, and continuous improvement practices to defend against evolving threats. Role Overview As a Security Monitoring & SIEM Analyst, you will play a key role within the Security Operations function, focused on real-time detection, investigation, and response to cyber threats using SIEM and security tooling. This role combines hands-on SIEM analysis, alert triage, investigation, and detection improvement, alongside exposure to incident response and proactive threat detection activities. You will work across multiple data sources to identify suspicious behaviour, analyse events, and support the organisation's cyber defence posture through effective monitoring and rapid response. Key Responsibilities Monitor, analyse, and investigate security alerts across SIEM and security tooling Conduct detailed investigations across log, endpoint, identity, and network telemetry Develop and optimise detection logic and SIEM queries to improve alert fidelity Analyse security events and correlate activity across multiple data sources Support incident response activities, including containment, escalation, and remediation Perform IOC analysis, enrichment, and validation using threat intelligence sources Identify gaps in detection capabilities and contribute to continuous improvement Work closely with infrastructure, SOC, and incident response teams to enhance response capability Produce clear and structured investigation reports and escalation summaries Skills & Experience Required Core SIEM & Detection Skills Strong knowledge of SIEM platforms (e.g. Microsoft Sentinel, Splunk, Elastic) Experience writing and tuning queries using: o Kusto Query Language (KQL) o ES QL / Kibana Query Language o Splunk SPL Understanding of event correlation, alerting, and detection use-case development Technical Foundations Strong knowledge of: o Linux and Windows operating systems o Core networking concepts (TCP/IP, DNS, HTTP/S, firewalls, VPNs) Experience analysing logs across: o Endpoint, identity, network, and cloud environments Threat Detection & Security Tooling Strong knowledge of: o EDR/XDR concepts and workflows o IDS/IPS technologies and signature-based detection Experience working with tools such as: o Microsoft Defender, CrowdStrike, SentinelOne, or similar Threat & Adversary Knowledge Understanding of attacker Tactics, Techniques and Procedures (TTPs) and how they manifest in logs and telemetry Familiarity with MITRE ATT&CK framework Evidence of staying up to date with: o Emerging threats o Adversary tradecraft o Defensive techniques Incident Handling & Investigation Experience handling security incidents through: o Detection and triage o Investigation and analysis o Handover to Incident Response teams Strong understanding of: o Incident management processes o Host-based forensic concepts Ability to apply post-incident review (PIR) learnings to improve detection and response Desirable Experience Experience within a SOC or cyber defence environment Exposure to threat hunting or detection engineering Experience in high-security or regulated environments Certifications (Beneficial) Microsoft SC-200 (Security Operations Analyst) GIAC / SANS certifications (GCIH, GCIA, GCED, etc.) CREST (CPIA, CRIA, CCTIA, CCBTP) Other recognised cyber security certifications Why Join? Work within a mature Security Operations environment Exposure to advanced SIEM tooling and large-scale environments Strong investment in training, certifications, and progression Opportunity to develop into: o Senior SIEM Analyst o Detection Engineer o Threat Hunter About Adecco Adecco is acting as an Employment Agency. We are proud to be an equal opportunities employer. We are on the client's supplier list for this role.
Jun 03, 2026
Full time
Security Monitoring & SIEM Analyst Location: Berkshire (Onsite) Salary: 45,000 - 60,000 + excellent benefits & training Security Clearance: Ideally SC Cleared or eligible for SC (UK Nationals only) Company Overview An exciting opportunity to join a global technology organisation with a well-established cyber security capability supporting mission-critical environments. Cyber security is central to the organisation's strategy, with ongoing investment in tooling, threat intelligence, and specialist talent. The security function operates at a mature level, combining Security Operations, threat detection, incident response, and continuous improvement practices to defend against evolving threats. Role Overview As a Security Monitoring & SIEM Analyst, you will play a key role within the Security Operations function, focused on real-time detection, investigation, and response to cyber threats using SIEM and security tooling. This role combines hands-on SIEM analysis, alert triage, investigation, and detection improvement, alongside exposure to incident response and proactive threat detection activities. You will work across multiple data sources to identify suspicious behaviour, analyse events, and support the organisation's cyber defence posture through effective monitoring and rapid response. Key Responsibilities Monitor, analyse, and investigate security alerts across SIEM and security tooling Conduct detailed investigations across log, endpoint, identity, and network telemetry Develop and optimise detection logic and SIEM queries to improve alert fidelity Analyse security events and correlate activity across multiple data sources Support incident response activities, including containment, escalation, and remediation Perform IOC analysis, enrichment, and validation using threat intelligence sources Identify gaps in detection capabilities and contribute to continuous improvement Work closely with infrastructure, SOC, and incident response teams to enhance response capability Produce clear and structured investigation reports and escalation summaries Skills & Experience Required Core SIEM & Detection Skills Strong knowledge of SIEM platforms (e.g. Microsoft Sentinel, Splunk, Elastic) Experience writing and tuning queries using: o Kusto Query Language (KQL) o ES QL / Kibana Query Language o Splunk SPL Understanding of event correlation, alerting, and detection use-case development Technical Foundations Strong knowledge of: o Linux and Windows operating systems o Core networking concepts (TCP/IP, DNS, HTTP/S, firewalls, VPNs) Experience analysing logs across: o Endpoint, identity, network, and cloud environments Threat Detection & Security Tooling Strong knowledge of: o EDR/XDR concepts and workflows o IDS/IPS technologies and signature-based detection Experience working with tools such as: o Microsoft Defender, CrowdStrike, SentinelOne, or similar Threat & Adversary Knowledge Understanding of attacker Tactics, Techniques and Procedures (TTPs) and how they manifest in logs and telemetry Familiarity with MITRE ATT&CK framework Evidence of staying up to date with: o Emerging threats o Adversary tradecraft o Defensive techniques Incident Handling & Investigation Experience handling security incidents through: o Detection and triage o Investigation and analysis o Handover to Incident Response teams Strong understanding of: o Incident management processes o Host-based forensic concepts Ability to apply post-incident review (PIR) learnings to improve detection and response Desirable Experience Experience within a SOC or cyber defence environment Exposure to threat hunting or detection engineering Experience in high-security or regulated environments Certifications (Beneficial) Microsoft SC-200 (Security Operations Analyst) GIAC / SANS certifications (GCIH, GCIA, GCED, etc.) CREST (CPIA, CRIA, CCTIA, CCBTP) Other recognised cyber security certifications Why Join? Work within a mature Security Operations environment Exposure to advanced SIEM tooling and large-scale environments Strong investment in training, certifications, and progression Opportunity to develop into: o Senior SIEM Analyst o Detection Engineer o Threat Hunter About Adecco Adecco is acting as an Employment Agency. We are proud to be an equal opportunities employer. We are on the client's supplier list for this role.
