Senior Security Engineer

Core technical skills
Microsoft 365 & Microsoft Defender
Security alert monitoring, incident investigation and remediation
Entra ID, Conditional Access
Active Directory, DNS, DHCP & Group Policy
Scripting and automation
Day-to-day responsibilities
Monitor the Microsoft Defender portal (Defender XDR) daily
Review incidents, alerts, and security risks
Triage alerts from:
Defender for Endpoint
Defender for Office 365
Defender for Identity
Microsoft Defender for Cloud Apps
Investigate security incidents
Identify the scope, impact, and root cause of incidents
Perform remediation actions such as:
device isolation
containment actions
user or session risk remediation
email threat remediation, including quarantine and purge actions
policy tuning to reduce false positives
Review Secure Score and Exposure Score
Identify and prioritise security improvement actions
Track remediation progress with stakeholders
Support threat hunting and proactive risk identification
Use Defender tools and advanced queries where required
Follow security playbooks and escalation procedures
Maintain clear records of incidents, investigation notes, and remediation actions
Work directly with stakeholders to escalate risks and support response activities
Provide recommendations to improve overall security posture
Preferred skills and qualifications
Relevant Microsoft certifications
Experience with Hyper-V virtualisation
Ability to support virtual environment design and deployment
Ability to build and maintain strong relationships with customers, partners, and vendors
Skills in Power Automate
Essential soft skills and experience
Strong English communication skills, both spoken and written (IELTS certification is preferred)
A team player with a positive attitude and professional approach
5+ years of hands-on experience in customer-facing environments
Experience working with overseas customers