Cyber Security Engineer

Infosec; Stevenage; On-site; GBP 76,000 - 127,000; Full time

Job summary

Infosec is seeking a Cyber Security Engineer for a hands-on, on-site role in Stevenage to support a mature Cyber Security Operations function. You will implement, maintain and optimise security technologies across complex environments, with a focus on SIEM, tooling, and automation.

The role involves integrating platforms via APIs, developing automation scripts in PowerShell and Python, and collaborating with SOC analysts to reduce false positives and improve detection capabilities.

Qualifications

• Experience in SIEM administration and security tooling deployment across enterprise environments.
• Ability to ingest and correlate data from multiple sources and tune alerts.
• Proficient in automation with PowerShell, Python, and regular expressions.

Responsibilities

• Administer and maintain SIEM and security monitoring platforms
• Configure and optimise log ingestion, correlation rules and alerting
• Develop and maintain automation using PowerShell, Python and Regex
• Integrate security technologies using APIs, HTTP/S and JSON
• Implement, maintain and optimise cyber security tooling
• Manage platform upgrades, patching and technology refresh activities
• Administer security appliance certificates and lifecycle activities
• Onboard new data sources into security platforms
• Lead tool integration and capability enhancement projects
• Support incident investigations through advanced queries and custom scripting
• Maintain platform availability, resilience and performance
• Work closely with SOC analysts to improve detection capabilities and reduce false positives
• Support change management, CAB activities and technical implementation planning

Skills

SIEM administration

Security tooling

Log onboarding

Detection engineering

Tools

Splunk

Microsoft Sentinel

QRadar

Elastic

LogRhythm

ArcSight

Wazuh

SOAR platforms

AI security automation

Job description

Cyber Security Engineer

Stevenage Up to 92 per hour (Inside IR35) 24 Month Contract Onsite Stevenage

We're supporting a leading organisation within the Defence sector in the recruitment of a Cyber Security Engineer to join a mature Cyber Security Operations function.

This is a hands‑on engineering role focused on the implementation, maintenance, optimisation and integration of security technologies across complex enterprise environments.

Key Responsibilities

• Administer and maintain SIEM and security monitoring platforms
• Configure and optimise log ingestion, correlation rules and alerting
• Develop and maintain automation using PowerShell, Python and Regex
• Integrate security technologies using APIs, HTTP/S and JSON
• Implement, maintain and optimise cyber security tooling
• Manage platform upgrades, patching and technology refresh activities
• Administer security appliance certificates and lifecycle activities
• Onboard new data sources into security platforms
• Lead tool integration and capability enhancement projects
• Support incident investigations through advanced queries and custom scripting
• Maintain platform availability, resilience and performance
• Work closely with SOC analysts to improve detection capabilities and reduce false positives
• Support change management, CAB activities and technical implementation planning

Essential Technical Skills

Security Platforms

• SIEM administration and support
• Security tooling implementation and maintenance
• Log onboarding and data source integration
• Detection engineering and alert tuning

Scripting & Automation

• PowerShell
• Python
• Regex

Integration Technologies

• REST APIs
• HTTP/S
• JSON

Infrastructure

• Active Directory
• LDAP
• Windows Server
• IIS
• SMB Storage
• Linux / Unix
• NFS Storage
• VMware
• Hyper‑V
• Virtual Networking

Security Engineering

• Certificate Management
• PKI
• Software Upgrades
• Security Platform Refresh Activities
• End of Life (EOL) Migrations
• End of Support (EOS) Upgrades
• Security Appliance Administration
• Threat Detection Technologies

Desirable

• Splunk
• Microsoft Sentinel
• QRadar
• Elastic
• LogRhythm
• ArcSight
• Wazuh
• SOAR Platforms
• AI / Machine Learning Security Automation
• Proxy Administration
• Network Packet Capture Technologies
• EDR / XDR Platforms

Contract Details

• Up to 92 per hour (Inside IR35)
• 24 Month Contract
• Stevenage
• 5 Days Onsite
• Single Stage Interview Process
• Defence Sector Environment

This role is best suited to Cyber Security Engineers, Security Engineers, SIEM Engineers, Security Platform Engineers and Detection Engineers with strong experience across security tooling, automation and platform engineering.