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Apex Systems

MS Defender Attack Surface Reduction (ASR)

Toronto, ON, Canada

Pay: $55 to $65 USD / hour
Job type: Contract
Apply by: Oct 23, 2026
Posting language: English
Posted: Sep 23, 2026

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Applications open in a new tab.

Original job description

Job#: 3045923

Job Description:

Client: Top 5 Bank

Terms: 12-month Contract

Location: 5 Days within the month/Downtown

Hours: 9-5

Key Skills

Microsoft Defender for Endpoint expertise

Attack Surface Reduction rule implementation and optimization

Endpoint security strategy

Security policy design and governance

Threat prevention and control hardening

Stakeholder engagement

Program and project leadership

Risk assessment and prioritization

KQL, PowerShell or automation scripting

Metrics, reporting, and continuous improvement

Required Qualifications

Bachelor’s degree in Cybersecurity, Computer Science, Information Technology, or a related field, or equivalent practical experience.

7+ years of experience in cybersecurity, endpoint security, or security engineering roles.

3+ years of experience leading or managing security initiatives, programs, or technical workstreams.

Strong hands-on experience with Microsoft Defender for Endpoint and the broader Microsoft Defender stack.

Proven experience designing, implementing, and tuning Attack Surface Reduction rules in enterprise environments.

Strong understanding of:

Endpoint threat vectors
Malware and ransomware techniques
Windows security controls
Endpoint detection and prevention
Security baselines and hardening standards
Experience deploying security controls through Intune, Group Policy, or similar enterprise endpoint management tools.

Strong familiarity with Windows enterprise environments, including:

Windows 10/11 and Windows Server Environments
Active Directory / Entra ID
Endpoint policy management
Administrative templates
PowerShell scripting
Experience balancing security requirements with operational needs in large, complex environments.

Strong written and verbal communication skills, with the ability to translate technical concepts into business-friendly recommendations.

Nice to haves

Assessment of current endpoint security posture
Identification of high-value ASR opportunities
Pilot planning, rule tuning, and phased rollout
Production deployment and post-implementation monitoring
Exception governance and continuous optimization
Develop and maintain enterprise standards for endpoint hardening, threat prevention, and security configuration management.
Lead risk-based decision-making for ASR deployment modes, including audit, warn, and block, balancing security outcomes with operational impact.
Create governance processes for security control exceptions, change management, documentation, and executive reporting.
Support incident response and post-incident reviews by identifying opportunities to improve preventive controls through Microsoft Defender and ASR capabilities.
Stay current on Microsoft security product updates, emerging attack techniques, and industry best practices to continuously evolve the control environment.

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico.

Everforth Apex Benefits Overview: In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA.

© 2026 Everforth, Inc. All rights reserved.

Everforth Apex Systems is part of the Commercial Segment of Everforth, Inc.

NYSE: EFOR

4400 Cox Road

Suite 200

Glen Allen, Virginia 23060

Everforth Apex is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. (Do not submit resumes or solicit consultants to this email address). UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Everforth Apex.

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More about this job

Responsibilities

The role involves implementing and optimizing Microsoft Defender Attack Surface Reduction rules to enhance endpoint security. You will lead security initiatives, manage risk-based deployments, and provide governance for security controls in a complex enterprise environment.

Requirements

Candidates must have at least 7 years of experience in cybersecurity or security engineering with deep expertise in the Microsoft Defender stack. A bachelor's degree in a relevant field or equivalent practical experience is required, along with strong scripting and policy management skills.

Skills

Microsoft Defender for Endpoint
Attack Surface Reduction
Endpoint security
Security policy design
Threat prevention
KQL
PowerShell
Automation scripting
Risk assessment
Stakeholder engagement
Intune
Group Policy
Active Directory
Entra ID
Security hardening
Incident response

Benefits

Training program
Certification preparation
Technical and leadership courses
Certification discounts
Career resources

Visa sponsorship

Not detected in the job text

Keywords

Microsoft Defender
Attack Surface Reduction
Endpoint Security
Cybersecurity
KQL
PowerShell
Intune
Group Policy
Active Directory
Entra ID
Risk Assessment
Hardening
Threat Prevention
Governance
Incident Response
Windows 10
Windows 11
Windows Server
Automation
Security Baselines
Change Management
Enterprise Security
Technical Leadership
Policy Management
Endpoint Detection

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