Cybersecurity Tools Lead – Microsoft Defender (MDE, MDI, MDCA)

Astra-North Infoteck Inc.; Calgary; On-site; CAD 120,000 - 180,000; Full time

Job summary

Astra-North Infoteck Inc. is seeking an experienced Security Tools Lead to administer and optimize our enterprise cybersecurity platforms, including CrowdStrike Falcon and Microsoft Defender suites. You will drive threat hunting, incident response, and security improvements across SOC, Infrastructure, Cloud, and Business teams.

The role requires strong leadership, proactive mindset, and ability to enhance the organization’s security posture through collaboration and effective tooling management.

Qualifications

• Extensive experience administering MDE/MDI/MDCA and Proofpoint Email Security.
• Strong background in threat hunting, incident response, and threat intelligence.
• Proven ability to lead a security tooling team and coordinate across SOC, Infra, and Cloud teams.

Responsibilities

• Administer and optimize Microsoft Defender Suite and CrowdStrike Falcon.
• Monitor alerts, investigate incidents, and provide remediation recommendations.
• Collaborate with SOC, Infrastructure, Cloud, and Business teams during incident response.
• Develop dashboards, reports, and operational documentation for security tools.

Skills

Threat hunting

Incident response

Security monitoring

Security policy tuning

Security analytics

Team leadership

Tools

Microsoft Defender for Endpoint (MDE)

Microsoft Defender for Identity (MDI)

Microsoft Defender for Cloud Apps (MDCA)

CrowdStrike Falcon

Proofpoint Email Security

Microsoft Sentinel SIEM

Windows Server Security

Active Directory Security

Job description

Cybersecurity Tools Lead – Microsoft Defender (MDE, MDI, MDCA) Required Skillset

• Microsoft Defender for Endpoint (MDE)


• Microsoft Defender for Identity (MDI)


• Microsoft Defender for Cloud Apps (MDCA)


• CrowdStrike Falcon


• Proofpoint Email Security


• Security Incident Investigation and Response


• Threat Hunting and Threat Intelligence


• Endpoint Detection & Response (EDR)


• SIEM/SOAR Integration Knowledge (Microsoft Sentinel preferred)


• Windows Server and Active Directory Security


• Email Security and Anti-Phishing Controls


• Security Monitoring and Alert Triage

Job Summary

We are seeking an experienced and highly motivated Security Tools Team Lead to lead the administration, optimization, and continuous improvement of enterprise cybersecurity platforms.

The role requires deep expertise in CrowdStrike EDR, Microsoft Defender for Endpoint (MDE), Microsoft Defender for Identity (MDI), Microsoft Defender for Cloud Apps (MDCA), and Proofpoint Email Security.

The successful candidate will lead a team of security specialists, manage daily operations, drive cybersecurity initiatives, support incident response activities, and collaborate closely with SOC, Infrastructure, Cloud, and Business teams.

The ideal candidate will possess strong technical expertise, leadership capabilities, stakeholder management skills, and a proactive mindset focused on enhancing the organization's security posture.

Key Responsibilities

• Administer and support Microsoft Defender Suite (MDE, MDI, MDCA).


• Manage CrowdStrike Falcon platform, including policy tuning, threat detection, and endpoint protection.


• Monitor and administer Proofpoint email security solutions to protect against phishing, malware, and business email compromise attacks.


• Investigate security alerts and incidents, perform root cause analysis, and provide remediation recommendations.


• Conduct proactive threat hunting across endpoints, identities, cloud applications, and email environments.


• Fine-tune detection rules and security policies to reduce false positives and improve security visibility.


• Integrate security tools with SIEM platforms such as Microsoft Sentinel.


• Develop and maintain security monitoring dashboards, reports, and operational documentation.


• Collaborate with infrastructure, application, and SOC teams during incident response and remediation activities.


• Support vulnerability management and security compliance initiatives.