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Added 3 mins ago
Sr Marketing Specialist
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$70,000 to $80,000 CAD / year
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Our client a top performing realtor organization located in the West end is seeking a Senior Marketing Specialist.
Added 3 mins ago
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CDW

Senior Security Operations Specialist

Mississauga, ON, Canada

Job type: Full-time
Apply by: Oct 18, 2026
Experience: 8 years total of Information Technology experience to include 3 to 5 years of security experience in a client-focused environment, and/or working in a security operations center
Posting language: English
Posted: Sep 18, 2026

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Original job description

Job Summary

The Sr. Specialist – Managed Security Services continues second-level technical client support provided by the Analyst and Sr. Analysts. The Sr. Specialist has proven process experience in all technical disciplines supported by the Managed Security Services practice, specializing in at least one of three particular disciplines: Network Security, Information Security and/or Endpoint Security. The Sr. Specialist provides both technical and process mentorship in these areas to Analysts and Sr. Analysts. The Sr. Specialist continues to develop a platform of technical expertise.

What You Will Do

Service Delivery – 50% job weight

Deliver tasks on time and with minimal or no supervision
Monitors and resolving second-level support requests accurately and timely. Escalates unresolved issues to senior team members and/or manager(s)
Develop, tune, and optimize security use cases, SIEM rules, and detection mechanisms across diverse client environments.
Lead complex or Tier-3 security incident investigations, coordinate containment strategies, and provide expert remediation guidance.
Performs security analytics and provides timely summarized findings and recommendations to clients
Conduct vulnerability assessments, review threat intelligence feeds, and prioritize risk mitigation recommendations for discussion with clients.
Lead and conduct hypothesis-based threat hunt across clients’ environments.
Build custom AI agents within SIEM/EDR for autonomous incident investigation and response.
Configure and administer SIEM and EDR platform for optimization
Performs root cause analysis and collaborate with Consultants and Analysts to solve repetitive system performance or configuration problems
Provide technical knowledge transfer to clients and internal department on low complexity problems
Build investigation playbooks and automated workflows to drive efficiency across the MSSP operations center
Carry out platform integrations for improved threat detection and response.
Serve as a subject matter expert for internal teams and external clients, delivering security posture reports, briefings, and strategic recommendations
Identifies, records, and escalates service performance trends, anomalies, and SLA breaches to senior leadership
Applies Trusted Advisor techniques to build up client trust and influence loyalty
Manages Great Client Communications
Works towards confidently running Great Meetings, differentiating services per MSS positioning
Handles technical account management responsibilities for assigned accounts
Provides supervision over technical aspects of service delivery
Prepare and deliver client facing quarterly, monthly meetings and tuning calls with designated accounts

Services Improvement and Enhancement - 30% job weight

Identifies and provides recommendations for technical deficiencies, service performance issues, product utilization, bugs, and enhancements
Assists in the development of reports and presentations and provides technical knowledge transfer and analysis to clients on performance status, trends, and metrics in a specific area of discipline.
Mentor analysts and serve as an escalation point for their technical related issues
Recommends process enhancements and drives efficiency by reducing average time to trouble-shoot, repetitive issues and problem service tickets, reducing false-positives
Performs ongoing analysis and system testing of new system releases, upgrades, and/or patches in one or more specific technologies
Makes recommendations to improve workflows and drive automation, creating efficiencies
Develops Standard Operating Procedures (SOPs) and knowledge base articles
Conduct technical and incident handling knowledge transfer sessions
Carry out research on supported technologies and develop actionable threat advisory documentation

Professional Development – 20% job weight

Attends training sessions or shadowing activities, and obtains industry related certifications as determined by Manager
Participate notably in assigned self-paced training

What We Expect Of You

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 working in a security operations center, OR
8 years total of Information Technology experience to include 3 to 5 years of security experience in a client-focused environment, and/or working in a security operations center
At least 2 administrator or expert level technical certifications in Managed Security Services disciplines, included but not limited to:
Cortex: XDR Engineer or XSIAM Engineer; IBM QRadar Secuity - Certified Administrator, Deployment Professional; SANS: GCIA, GCIH, GSOC; Splunk, Crowdstrike Falcon - CCFA, CCIS, CCFH, CCCS, CCSE; Exabeam: Security Engineer Associate, Security Engineer Advanced, Associate Implementation Engineer; Tenable VM Specialist, Microsoft SC-200, SC-100, C|EH, C|CIH, or similar technology certifications
The position is part of a 7-day per week, 24-hour per day managed services operations. To provide the required coverage; work weekends, holidays, and overtime must be available.
Positive team influence, approachable, supportive, and actively participates in coaching and learning.
Punctual and organized, ensures timely completion of tasks.
Experience supporting and implementing IT infrastructure and Information Systems design or support involving hardware, software and services at an enterprise level for at least one discipline in the Managed Security Services portfolio
Demonstrated ability to investigate increasingly complex problems where analysis of data requires evaluation of identifiable factors from multiple IT infrastructure systems
Demonstrated ability to continuously identify resolutions and techniques that meet technical requirements within the context of best practices, and make recommendations to achieve targeted objectives
Proven ability to establish collaborative approach to problem solving, ensuring that others’ input is gathered and discussed, and that solutions generated by the team are tested and proven
Mentors team members and work independently with minimal supervision.
Sets and achieves goals autonomously, contributing to team and organizational objectives.
Demonstrated ability to achieve high level of Customer Satisfaction on all engagements
Demonstrates strong verbal and written communication skills, as well as proficiency in Microsoft Office tools.
Demonstrated ability to execute service delivery using productivity tools such as word processing, spreadsheet, diagram creation, presentation and email processing applications.

CDW is committed to being an AI-fluent organization

We’re looking for people who bring curiosity, a learner’s mindset, and a willingness to engage with ever-evolving technology and tools. We value adopting AI as a partner, openness to experimentation, and a shared interest in learning together on AI. Our goal is to create a culture where AI enhances - not replaces - human creativity and decision-making. You don’t need to be an expert today; what matters is your readiness to explore, adapt, and grow with us as we integrate AI responsibly and effectively into our work.

Additionally, CDW is committed to fostering an equitable, transparent, and respectful hiring process for all applicants. During our application process, our goal is to understand your experience, strengths, skills, and qualifications. As an AI forward company, we see AI not just as a tool, but as a catalyst for new ways of thinking, creating, and communicating. We encourage candidates to embrace an AI mindset, one that’s curious, adaptive, and ready to explore what’s possible. We welcome thoughtful use of AI to expand your perspective and elevate how you share your story, while ensuring your application remains rooted in your own background, judgment, and voice.

About Us

CDW is a Fortune 500 technology solutions provider that helps businesses, government, education, and healthcare organizations achieve what’s possible through technology. What makes CDW different isn’t just what we do - it’s how we do it. At CDW we act as one - building trust, speaking candidly, and working together to achieve more. We play to win - focusing on what matters most and delivering for our customers. And we think forward - staying curious, moving fast, and continuously learning. We believe meaningful work happens when people feel supported, heard, and empowered to contribute. That’s why we think of ourselves as coworkers, not just employees - working together to solve complex challenges and deliver real impact for our customers and communities.

As a full‑stack, full‑lifecycle technology partner, CDW brings deep expertise, strong relationships, and broad industry knowledge to help turn ideas into outcomes. When you join CDW, you become part of a collaborative environment where your work matters, your growth is supported, and your contributions help shape what’s next.

Together, we deliver the full promise of what technology can do. Together, we Make Amazing Happen.

CDW is an equal opportunity employer. All qualified applicants will receive consideration for employment without regards to race, color, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status or any other basis prohibited by state and local law.

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More about this job

Responsibilities

The Senior Security Operations Specialist provides second-level technical support, leads complex incident investigations, and optimizes security use cases and detection mechanisms. They also mentor junior analysts, manage client communications, and drive service improvements through automation and process enhancements.

Requirements

Candidates must have a bachelor's degree in a technology-related field with 3 to 5 years of security experience, or 8 years of total IT experience including 3 to 5 years in security. Additionally, applicants must hold at least two administrator or expert-level technical certifications in relevant managed security disciplines.

Skills

Network Security
Information Security
Endpoint Security
SIEM
EDR
Incident Investigation
Vulnerability Assessment
Threat Hunting
AI Agents
Root Cause Analysis
Technical Mentorship
SLA Management
Security Analytics
Playbook Development
Risk Mitigation
Client Communication

Visa sponsorship

Not detected in the job text

Keywords

Managed Security Services
Network Security
Information Security
Endpoint Security
SIEM
EDR
Cortex XDR
IBM QRadar
Splunk
Crowdstrike Falcon
Exabeam
Tenable
Threat Intelligence
Incident Response
Vulnerability Assessment
Threat Hunting
AI Agents
SLA
Root Cause Analysis
SOP
Security Operations Center
Microsoft SC-200
Microsoft SC-100
C|EH
C|CIH
Automation
Technical Account Management
Risk Mitigation
Security Posture
Managed Services

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