Senior Security Operations Specialist

CDW

. Deliver Managed Security Services tasks on time with minimal supervision .

Posted 9/18/2026full-timeMississauga • CanadaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Managed Security Services, including security incident investigations, vulnerability assessments, and the development of security use cases. Proficient in configuring and administering SIEM and EDR platforms while providing technical knowledge transfer and mentoring to team members.

Highest-signal resume keywords

Managed Security ServicesSIEM AdministrationSecurity Incident InvestigationVulnerability AssessmentTechnical Knowledge Transfer

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Security Use Case DevelopmentThreat Intelligence ReviewRoot Cause AnalysisAutomation of WorkflowsData AnalysisIncident HandlingConfiguration ManagementPerformance OptimizationHypothesis-Based Threat HuntingClient-Facing Reporting

Soft Skills

Strong Communication SkillsCollaborative Problem SolvingMentoringCustomer Satisfaction FocusPositive Team Influence

Tools & Technologies

SIEM PlatformsEDR PlatformsMicrosoft Office SuiteAutomation ToolsIncident Management Systems

Certifications & Qualifications

Technical Certifications in Managed Security ServicesExpert-Level Security Certifications

Industry Keywords

Security Operations CenterInformation TechnologyClient-Focused EnvironmentRisk MitigationService Level Agreement (SLA)

About the role

Key responsibilities & impact

Deliver Managed Security Services tasks on time with minimal supervision
Monitor and resolve second-level support requests; escalate unresolved issues
Develop, tune, and optimize security use cases, SIEM rules, and detection mechanisms
Lead Tier-3 security incident investigations, containment strategies, and remediation
Perform security analytics and provide client findings and recommendations
Conduct vulnerability assessments, review threat intelligence, and prioritize risk mitigation
Lead hypothesis-based threat hunts across client environments
Build custom AI agents within SIEM/EDR for autonomous investigation and response
Configure and administer SIEM and EDR platforms
Perform root cause analysis and resolve recurring performance or configuration issues
Provide technical knowledge transfer to clients and internal departments
Build investigation playbooks and automated workflows
Integrate platforms to improve threat detection and response
Serve as a subject matter expert and deliver security posture reports, briefings, and recommendations
Identify and escalate service trends, anomalies, and SLA breaches
Handle technical account management and supervise technical service delivery
Prepare and deliver client-facing quarterly and monthly meetings and tuning calls
Recommend improvements for technical deficiencies, service performance, product utilization, bugs, and enhancements
Mentor analysts and serve as an escalation point
Improve workflows, reduce troubleshooting time and false positives, and drive automation
Analyze and test system releases, upgrades, and patches
Develop SOPs, knowledge base articles, and threat advisory documentation
Conduct technical and incident-handling knowledge transfer sessions
Attend training and participate in professional development activities

Requirements

What you’ll need

Bachelor's degree (B.A./B.S.) or a 3-year diploma in Engineering, Computer Science, or a Technology-related field and 3 to 5 years of security experience in a client-focused environment and/or security operations center; OR 8 years of total Information Technology experience including 3 to 5 years of security experience
At least 2 administrator- or expert-level technical certifications in Managed Security Services disciplines
Availability to work weekends, holidays, and overtime in a 7-day-per-week, 24-hour-per-day managed services operation
Experience supporting and implementing enterprise-level IT infrastructure and information systems design or support in at least one Managed Security Services discipline
Ability to investigate increasingly complex problems using data from multiple IT infrastructure systems
Ability to identify resolutions and techniques meeting technical requirements and recommend ways to achieve objectives
Ability to establish collaborative problem-solving approaches and test and validate team-generated solutions
Ability to mentor team members and work independently with minimal supervision
Ability to set and achieve goals autonomously
Ability to achieve high customer satisfaction on engagements
Strong verbal and written communication skills
Proficiency in Microsoft Office tools and productivity applications for word processing, spreadsheets, diagrams, presentations, and email
Positive team influence; approachable, supportive, punctual, and organized

Benefits

Comp & perks

Training sessions or shadowing activities
Industry-related certifications as determined by Manager
Self-paced training
Coaching and learning opportunities
Supportive, equitable, transparent, and respectful hiring process
Collaborative environment with supported professional growth