Senior Security Consultant – Managed Services

CDW LLC.; Mississauga; On-site; CAD 65,000 - 91,000; Full time

Job summary

CDW is seeking a Sr. Security Consultant to provide ongoing client support for complex security performance issues, focusing on Microsoft Sentinel and Defender, and acting as a subject matter expert.

Deploy, tune, and optimize SIEM platforms, onboard customers, mentor analysts, and drive process improvements. The role requires 5+ years in security support or SOC and advanced certifications; willingness to deliver 24/7 coverage is expected.

Qualifications

• Bachelor's degree in IT or Engineering and 5+ years in security support or SOC.
• At least 2 advanced certifications in Managed Security Services (e.g., CCIE Security, PCNSE, SC-200/SC-100).
• Hands-on experience configuring and optimizing SIEM platforms.

Responsibilities

• Deploy, tune, and optimize MS Sentinel and Defender.
• Onboard new customers and act as a SME for MS Sentinel/Defender.
• Escalation point for SOC analysts and customers on complex issues.
• Conduct service reviews and QA; mentor team on technical issues.
• Drive process improvements to reduce MTTR and false positives.

Skills

SIEM technologies

MS Sentinel

MS Defender

SOC

Mentorship

On-call support

Technical ownership

Process improvement

Education

Bachelor's degree in IT/Engineering or related field

Tools

Microsoft Sentinel

Microsoft Defender

QRadar

Splunk

Exabeam

Sumo Logic

Job description

Description

The Sr. Security Consultant performs ongoing client support for complex technical performance issues and develops recommendations to ensure adherence to service level agreements and customer service excellence. The Sr. Consultant will specialize in Managed Detection and Response service on Microsoft technology stack, primarily Sentinel and Defender, and act as a subject matter expert. In addition, the Sr Consultant is required to provide input on how to drive process improvements, gain efficiencies, and create opportunities for improved workflow and automation. The Sr Consultant acts as a primary technical owner on the assigned accounts.

This role requires strong hands-on proven working experience on various SIEM technologies. This should include deployment, management, customization, and optimization of SIEM.

What you will do:

Services Delivery – 50% job weight

• Deploy, tune and optimize MS Sentinel and Defender platforms.
• Perform new customer onboarding.
• Act as a Subject Matter Expert for MS Sentinel and MS Defender.
• Act as an escalation point for SOC analysts as well as assigned customers in case of complex technical questions.
• Handle technical account management responsibilities for assigned customers.
• Conduct weekly, monthly and quarterly service review calls with assigned customers.
• Perform Quality Assurance reviews.
• Mentor team with technical advice / support.
• Recommend and implement process improvements in order to drive efficiencies, reduction of the average time to troubleshoot, and reducing false-positive alerts.
• Embodies Trusted Advisor techniques to build client’s trust and influence loyalty.
• Confidently run Great Meetings, differentiating services per MSS positioning.
• Helps improve the business, proactively engages when service is inconsistent, or risk is identified.
• Identifies and manages out of scope requirements and facilitates the resolution.
• Perform on-call duties as per agreed schedule.

Services Improvement and Enhancement - 35% job weight

• Develop and improve Standard Operating Procedures (SOPs) and knowledge base articles.
• Develops methodologies, strategies, process documentation and templates suitable for use by other Consultants, Specialists and Analysts.
• Develop new and tune existing use cases.
• Accountable for executing on identified recommendations to improve client’s security posture.
• Conducts technical, procedural and incident handling knowledge transfer training sessions.
• Develop reports and presentations, both internal and external.
• Contributes to the development of service definition and content packs.
• Makes recommendations to improve workflows and drive automation, creating efficiencies.
• Identifies out of scope requirements and bring to manager’s attention.

Professional Development - 15% job weight

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

What we expect of you:

• Bachelor's degree (B.A./B.S.) or 3-year diploma in Engineering, Computer Science, or a Technology related field and 5 years of Security Support experience in a client-focused environment, and/or working in security operations center, OR
• 9 years total of Information Technology experience to include 5 years of Security Support experience in a client-focused environment, and/or working in security operations center.
• At least 2 advanced or expert level certifications in Managed Security Services discipline, including but not limited to: CCIE Security; Palo Alto PCNSE, Cortex XDR-PMXdC; IBM QRadar Security: Administrator and Deployment Professional; SANS GCIA, GCIH, Splunk, CrowdStrike Falcon: CCCS, CCFH, CCFA, CCIS; Exabeam: Advanced or Principal Implementation Engineer; Microsoft SC-200, SC-100.
• Demonstrated strong hands-on working experience on SIEM technologies.
• The position is part of a 7-day per week, 24-hour per day managed services operations. To provide the required coverage, must be available to work other shifts including weekends, holidays, and overtime, perform on-call duties.
• Excellent prioritization and time management skills, including the ability to manage their time without supervision to focus on priorities and handle multiple tasks simultaneously.
• Experience designing, implementing, and supporting 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.
• Direct involvement in working with internal and external teams to implement and troubleshoot complex configuration hardware, software and services.
• Experience presenting ideas and solutions to clients and adapting presentation style to fit particular client situations.
• Demonstrated ability to establish positive working relationships and conduct complex and important work critical to the organization in a team, consulting environment.
• Proven ability to select resolutions and techniques that meet technical requirements within the context of best practices, and make recommendations to achieve targeted objectives.
• Clear, concise, and engaging communication and presentation skills in various settings.
• Collaborative problem-solving approach and mentorship ability.
• Ability to work independently and step into leadership roles.
• Consistently achieves high levels of customer satisfaction.
• Microsoft Sentinel is a plus. Other SIEM like QRadar, Splunk, Exabeam, SumoLogic is an asset.
• Microsoft SC-200, SC-100 certifications are a plus.

At CDW, we strive to offer market-competitive total rewards packages to attract andretaintalent. As such, we are committed topaytransparencyand ensuring fair compensation for all our coworkers. Each of our roles isassignedasalaryrange that is informed by multiple sources of market data.Wedetermineindividualpaywithin a given range based on a candidate's prior experience, knowledge,skillsand abilities. This approach allows us to offer competitive andequitablesalaries that reflect the value and responsibilities of each role at CDW. Salaries are based on a37.5 -hourworkweek, andpaid on a bi-weekly payroll schedule.

Pay range: $47.18 - $66.05 /hour, depending on experience and skill set.

This postingreflectsacurrently available position within our organization for which we are actively recruiting.

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.