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About the Role

Ernst & Young is seeking junior and intermediate-level technical security professionals with hands-on expertise in Microsoft Sentinel and Microsoft Defender to support our Managed Detection and Response (MDR) services within a Security Operations Center (SOC) environment. This role is designed for an experienced Tier 1 / Tier 2 SOC Analyst who performs threat detection, investigation, and response activities. The successful candidate will operate in a client-facing MSSP environment and will contribute directly to the quality, effectiveness, and continuous improvement of EY’s MDR services.

Responsibilities

Perform security monitoring, triage, and investigation of alerts generated from Microsoft Sentinel and Microsoft Defender platforms using documented playbooks.
Escalate confirmed or complex incidents, including suspected compromise, lateral movement, persistence mechanisms, and data exfiltration scenarios.
Perform investigations using log analytics, endpoint telemetry, identity signals, and cloud-native audit logs.
Validate, scope, and document security incidents, including root cause analysis and impact assessment.
Assist with containment and recovery under senior guidance.
Support tuning and maintenance of Sentinel analytics rules.
Assist with false positive reduction and improving signal quality across Sentinel and Defender data sources.
Document detection gaps.
Contribute to use case development under guidance to enhance detections, hunting queries, and alert enrichment.
Support threat hunting activities.
Identify anomalous or suspicious activity that may not trigger existing detections.
Document hunting hypotheses, findings, and recommendations for detection improvements or control gaps.
Communicating incident findings clearly.
Participating in client calls when required.
Supporting onboarding and steady-state operations.
Support senior team members in identifying logging, configuration improvements.
Support onboarding and steady-state operations for MDR clients within a managed services context.
Contribute to playbooks and procedural improvements.
Participate in knowledge sharing and case reviews.
Assist with service quality improvements, detection maturity, and operational consistency across clients.
Ensure investigations and responses align with applicable regulatory, contractual, and evidentiary requirements.

Requirements

Proven experience operating in a SOC or MSSP environment at a Tier 1 or Tier 2 level.
Hands-on expertise with Microsoft Sentinel, including analytics rules, KQL, workbooks, and incident investigations.
Experience with Microsoft Defender technologies, including Defender for Endpoint and identity-related signals.
Exposure to investigations across cloud, endpoint, and identity domains.
Working understanding of attack techniques, threat actor behaviors, and incident response methodologies.
Ability to manage multiple investigations simultaneously while maintaining investigation quality and documentation.
Strong written and verbal communication skills, with the ability to explain technical findings to security-focused audiences.
Proficiency in French, including Quebec French, is desired for client facing engagements.

Skills

Microsoft Sentinel
Microsoft Defender
KQL
Workbooks
Defender for Endpoint
Incident Response
Security Monitoring
Threat Detection
Threat Hunting
Log Analytics
Endpoint Telemetry
Identity Signals
Cloud-Native Audit Logs

Location

Toronto
Calgary
Vancouver
Ottawa
St. John's
Halifax
Saint John
Dieppe
Victoria

Work Type

Managed Detection and Response (MDR)
Security Operations Center (SOC)
Managed Services

Experience Level

Junior
Intermediate
Tier 1
Tier 2
1-2 years of experience in cybersecurity operations

Education Level

Bachelor’s degree in Computer Science, Information Technology, Cybersecurity, or a related discipline.
Microsoft Certified: Azure Security Engineer Associate
Microsoft Sentinel specialization
CISSP, GCED, GCIA, or similar (preferred, not required)

Salary/Compensations

Toronto, Calgary, Vancouver : $65,500 - $99,000
Ottawa, St. John's : $62,500 - $94,000
Halifax, Saint John, Dieppe, Victoria : $59,000 - $89,000

About the Company

EY is building a better working world by creating new values for clients, people, society and the planet, while building trust in capital markets.
Enabled by data, AI and advanced technology, EY teams help clients shape the future with confidence and develop answers for the most pressing issues of today and tomorrow.
EY teams work across a full spectrum of services in assurance, consulting, tax, strategy and transactions.
Fueled by sector insights, a globally connected, multi-disciplinary network and diverse ecosystem partners, EY teams can provide services in more than 150 countries and territories.
At EY, we use artificial intelligence (AI) tools as one element of our recruitment process to enhance efficiency and improve the candidate experience.
While AI supports us in our process, human judgment and decision-making remain integral in our candidate experience.
We are committed to the responsible use of AI, and our practices are continuously reviewed and refined to ensure they align with ethical principles and regulatory requirements.

Equal Opportunity

Inclusiveness is the heart of who we are and how we work.
We’re committed to fostering an environment where differences are valued, policies and practices are equitable, and our people feel a sense of belonging.
We embrace diversity and are committed to combating systemic racism, advancing gender equity and women in leadership, advocating for the 2SLGBTQIA+ community, promoting our neuroinclusion and accessibility initiatives, and are dedicated to amplifying the voices of Indigenous peoples (First Nations, Inuit, and Métis) nationally as we strive towards reconciliation.
Our diverse experiences, abilities, backgrounds, and perspectives make our people unique and help guide us.
Because when people feel free to be their authentic selves at work, they bring their best and are empowered to build a better working world.
Learn about our commitment to Inclusiveness at https://www.ey.com/en_ca/about-us/corporate-responsibility/equity