Contract Senior Security Engineer: Azure & SOC

United States Digital Space LLC; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

United States Digital Space LLC is seeking a senior security engineer to bridge cloud security, detection tooling, and incident response. You will own meaningful parts of the security stack, contribute to Azure hardening, and coordinate pen-test cycles.

The role is a contract position with day-one impact and independent work expectations. You’ll bring hands-on SIEM experience (Microsoft Sentinel preferred), Azure security knowledge, Terraform/Bicep for security tooling, and a proactive approach

Qualifications

• Hands-on SIEM experience, ideally Microsoft Sentinel; equivalent platforms considered.
• Practical Azure security experience across Defender for Cloud, Entra ID, Azure networking, and cloud security posture management.
• Experience writing infrastructure-as-code using Terraform or Bicep in a security engineering context.
• Experience driving vulnerability remediation cycles with engineering squads.
• Familiarity with data-loss-prevention controls and AI security considerations.

Responsibilities

• Own and operate our alerting and monitoring capability through a transition period, keeping detection and response steady.
• Maintain and improve our Microsoft Sentinel deployment: writing and tuning detection rules, managing data connectors, and reducing alert noise.
• Operate and optimise Defender XDR and Defender for Cloud, including policy management and posture recommendations.
• Maintain and extend automated security checks in our delivery pipelines (shift-left).
• Drive down time-to-fix on known vulnerabilities, coordinating remediation with engineering squads.
• Support data-loss-prevention controls that reduce the risk of sensitive data leaving the business.
• Support safeguards around how the business accesses and uses AI, including securing AI workloads and their data exposure.
• Investigate suspicious activity surfaced through Sentinel and Defender: triage, elevate, or contain as appropriate.
• Support incident response, including containment, evidence gathering, and post-incident review.
• Contribute to detection-as-code and infrastructure-as-code (Terraform or Bicep) for security tooling.
• Coordinate penetration test engagements (scope, logistics, findings review) and work with engineering teams to prioritise remediation.

Skills

Microsoft Sentinel

Azure security

Vulnerability remediation

Threat modelling

Incident response

AI security

KQL

Security operations

Growth mindset

Security tooling

Penetration testing coordination

Fintech security

Defender XDR

Defender for Cloud

Azure DevSecOps

Tools

Microsoft Sentinel

Defender XDR

Defender for Cloud

Terraform

Bicep

KQL

Splunk

QRadar

Job description

United States Digital Space LLC is seeking a senior security engineer to bridge cloud security, detection tooling, and incident response. You will own meaningful parts of the security stack, contribute to Azure hardening, and coordinate pen-test cycles.

The role is a contract position with day-one impact and independent work expectations. You’ll bring hands-on SIEM experience (Microsoft Sentinel preferred), Azure security knowledge, Terraform/Bicep for security tooling, and a proactive approach