Location: Toronto, ON, Hybrid, 2 to 3 days on-site per week
Language: Advanced English, written and spoken
Duration: Permanent
Background Check Requirement: Must be eligible to obtain a criminal background check and meet reliability screening requirements

About the Opportunity

Join a leading organization in the financial services sector that plays a vital role in Canada’s digital economy. As a Firewall Security Senior Specialist, you will be part of a high-performing Cybersecurity team focused on protecting critical infrastructure and enabling secure innovation.

This is an opportunity to collaborate with architects, product leaders, and technical experts who are passionate about building secure, resilient systems. Your work will directly support secure real-time transactions and digital services that impact millions of Canadians every day.

What’s In It for You

You’ll work in a culture that values innovation, accountability, and continuous learning. This is a workplace where your expertise is respected and your voice matters in shaping secure architecture decisions.

You’ll gain exposure to enterprise-scale environments, emerging security technologies, and cross-functional initiatives that stretch your skills and expand your impact. Professional growth, mentorship, and meaningful work are at the core of this team’s approach.

Your Responsibilities

• You’ll act as a network security subject matter expert, advising on segmentation, zoning, and access controls.
• In this role, you’ll oversee firewall, UTM, NAC, DNS firewall, NDR, DDoS, CDN, and WAF capabilities to ensure strong defensive posture.
• You’ll review and approve network security designs and changes delivered by managed service providers.
• You’ll design and refine detection and protection use cases, including custom IDS and IPS signatures.
• You’ll lead infrastructure threat modeling and support penetration and segmentation testing initiatives.
• You’ll analyze network traffic and PCAP data to support threat hunting and incident response.
• You’ll develop KPIs and KRIs and communicate security insights clearly to both technical and non-technical stakeholders.

Skills and Qualifications

• 5 to 7+ years of progressive experience in network security or a related cybersecurity field.
• Post-secondary degree or diploma in Computer Science, Engineering, or a related discipline.
• Deep expertise in firewalls, DDoS protection, DNS security, NDR, and enterprise network architecture.
• Strong knowledge of threat modeling, risk analysis, vulnerability management, and penetration testing.
• Familiarity with security frameworks such as OWASP, ISO 27001, and NIST.
• Relevant certifications such as CISSP, CSSLP, or OSCP are considered an asset.
• Excellent communication skills and the ability to work both autonomously and collaboratively.
• Eligibility to apply for a Secret Federal Government Clearance (requires 10 years of physical presence in Canada)

Note from the Hiring Manager

“We’re looking for someone who is both strategic and hands-on, someone who can challenge assumptions, strengthen our network security posture, and bring thoughtful solutions to complex problems.”

Why Partner with Altis

If you’ve never worked with a staffing agency before, we make it easy. We work with top employers across Canada who have great jobs to fill, each vetted and verified by our team. When you apply for a job with Altis, we get to know you as a candidate and learn what your strengths are. Then, if you’re a solid match, we handle all the logistics, advocating for you as a candidate for the role, providing access to coaching and connecting you directly with the hiring manager. And rest assured, all our services are free of cost for candidates.