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Security Engineer – Microsoft 365 Security, Detection
Project Time & Cost, LLCSecurity Engineer securing and monitoring Microsoft 365 environment at rapidly growing professional services firm. Responsibilities include threat detection and incident response across Microsoft security platforms.
Tech Stack
Tools & technologiesAzureCloudPython
About the role
Key responsibilities & impact- Monitor and investigate alerts across Microsoft Defender (Defender for Endpoint, Defender for Identity, Defender for Office 365) and associated security platforms
- Analyze Entra ID (Azure AD) sign-in logs, audit logs, and risky sign-in activity to identify potential account compromise or misuse
- Respond to security incidents involving endpoints, identities, email, and collaboration platforms
- Tune and optimize detection rules, alert thresholds, and signal-to-noise ratios within SIEM and Microsoft security tools
- Perform log analysis and basic threat hunting using tools such as Microsoft Sentinel, Defender Advanced Hunting, and audit logs
- Implement and validate Conditional Access policies, MFA enforcement, and identity protection controls
- Support endpoint security through Intune and Defender for Endpoint, including policy enforcement, device compliance, and response actions
- Collaborate with IT to harden Microsoft 365 configurations (Exchange Online, SharePoint, Teams) and reduce attack surface
- Support vulnerability management by identifying gaps and coordinating remediation across systems and endpoints
- Maintain clear and audit-ready documentation of incidents, controls, and response activities
- Assist with eDiscovery, audit requests, and compliance-related investigations when required
- Identify gaps in monitoring, coverage, or controls and recommend improvements to security architecture
Requirements
What you’ll need- Strong understanding of Microsoft 365 security architecture, including Entra ID, Exchange Online, SharePoint, and Teams
- Experience with Microsoft Defender security stack (Defender for Endpoint, Office 365, Identity, or Cloud Apps)
- Familiarity with identity security concepts such as MFA, Conditional Access, and identity risk
- Experience with endpoint management and security using Microsoft Intune or similar platforms
- Working knowledge of incident response processes and common attack techniques (phishing, credential abuse, lateral movement)
- Log analysis and threat hunting using Microsoft Sentinel or Defender Advanced Hunting (KQL experience preferred)
- Experience configuring and tuning alerts in SIEM, EDR, or cloud-native security tools
- Scripting or automation using PowerShell, KQL, or Python
- Experience with email security, phishing analysis, and investigation within Exchange Online
Benefits
Comp & perks- Opportunity for advancement within a rapidly growing professional services firm
- Competitive compensation
- 401(k) and medical benefits
ATS Keywords
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Hard Skills & Tools
Microsoft DefenderEntra IDAzure ADlog analysisthreat huntingConditional AccessMFAPowerShellKQLendpoint management
Soft Skills
collaborationincident responsedocumentationcommunicationproblem-solving