Senior SOC Engineer

Responsibilities

• Develop, test and deploy detection content across Microsoft Sentinel and Splunk SIEM.
• Write and optimise detection logic using KQL and SPL.
• Turn monitoring requirements and use cases into effective, actionable detections.
• Tune alerts to reduce false positives and improve SOC efficiency.
• Validate detections against telemetry and ensure accuracy.
• Support onboarding of log sources across cloud, infrastructure, identity and network.
• Collaborate with SOC, Threat Intelligence and Security Architecture teams.
• Investigate detection issues and improve performance and reliability.
• Drive continuous improvement using automation, scripting and best practice.
• Ensure detections are clearly documented and operationally usable.

Requirements

• Experience in SOC engineering, detection engineering or SIEM engineering.
• Strong hands-on experience with Microsoft Sentinel and Splunk.
• Solid knowledge of KQL and SPL.
• Experience building, testing and maintaining detection rules.
• Good understanding of SIEM lifecycle management and security telemetry.
• Knowledge of cloud environments and IT infrastructure.
• Familiarity with frameworks such as MITRE ATT&CK.
• Ability to analyse threats and translate them into detection capability.
• Experience with SOAR (Logic Apps / Splunk SOAR).
• Detection-as-code or CI/CD pipeline experience.
• Scripting in PowerShell, Python or similar.
• Experience with Git-based workflows.
• Relevant certifications (Microsoft, Splunk, Cyber Security).
• Employment Type: Permanent
• Location: Hybrid: 2 days Farnborough Office. 3 days home.
• Security Clearance Level: Eligible for SC Clearance.
• Internal Recruiter: Jane
• Salary: To £80K
• Benefits: 25 days annual leave with the choice to buy additional days,4 x life Insurance, matched contributory pension to 6%, 3% flex benefit, single private medical cover, £5400.00 car allowance.
• Loved reading about this job and want to know more about us?
• Sopra Steria's Aerospace, Defence and Security business designs, develops and deploys digital solutions to Central Government clients. The work we do makes a real difference to the client's goal of National Security, and we operate in a unique and privileged environment.

Additional Information

Build the detections that stop threats in their tracks. We're looking for a Senior SOC Engineer (Detection) to join our growing Cyber Security team. This is a hands-on engineering role where you'll design and deliver high-quality detections across Microsoft Sentinel and Splunk, helping protect critical systems and clients in real time. If you thrive on turning threat intelligence into actionable detection logic-and enjoy working at the heart of a live SOC-this is your opportunity to make a real impact. This role is Hybrid: 2 days in the Farnborough office, 3 days from home. You do need to be eligible for SC Clearance.

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