Senior Network Security Engineer

Location: Ottawa, ON (Hybrid, 8 days per month in office)

Duration: 2-year contract to start

Language: Strong written and verbal communication skills in English

Background Check Requirement: Active Government of Canada Secret Security Clearance is required

About the Opportunity

Join a collaborative technology team supporting the delivery of secure, reliable, and modern network infrastructure within a large public sector environment. This opportunity is ideal for a network security professional who enjoys solving complex technical challenges while helping strengthen critical enterprise services that support Canadians.

Working alongside experienced infrastructure and security specialists, you will contribute to the ongoing evolution of enterprise networking, operational excellence, and security best practices. You'll play an important role in modernizing network environments, improving resilience, and ensuring secure, high-performing services through continuous improvement initiatives.

What's In It for You

This role offers the opportunity to work on large-scale enterprise technologies in a collaborative environment that values innovation, continuous learning, and knowledge sharing. You'll gain exposure to complex networking and security initiatives while contributing to meaningful modernization efforts alongside a highly skilled technical team.

Your Responsibilities

• You'll support the day-to-day operation, maintenance, and continuous improvement of enterprise network and network security services, with a focus on operational stability and evergreening initiatives.

• You'll troubleshoot and resolve complex cross-functional networking and security issues, identifying root causes and mitigating risks in production and non-production environments.

• You'll participate in testing activities, including deployment validation, failover testing, disaster recovery, and vulnerability remediation to ensure reliable and secure infrastructure.

• You'll analyze existing network environments to identify security gaps, operational improvements, and opportunities to simplify and modernize enterprise solutions.

• You'll implement infrastructure upgrades, security enhancements, and configuration changes to support evolving business and operational requirements.

• You'll monitor network security events, investigate alerts and incidents, and collaborate with internal teams to strengthen security posture while ensuring compliance with established standards.

• You'll contribute to automation initiatives and CI/CD practices that improve operational efficiency and reduce repetitive manual tasks.

Skills and Qualifications

• 5+ years of recent experience in enterprise network operations and network security, including testing, troubleshooting, and systems integration.

• University degree or college diploma in Computer Science, Information Technology, Engineering, or a related discipline.

• Hands-on experience supporting Cisco switching and routing platforms and Check Point firewall technologies, including security management platforms.

• Strong knowledge of IT Operations, including monitoring, incident response, vulnerability management, and operational support within enterprise environments.

• Experience participating in CI/CD processes and supporting scalable, highly available service-oriented architectures.

• Experience configuring, supporting, and troubleshooting network security controls, including firewalls, segmentation policies, and secure network configurations.

• Experience working within Agile/SCRUM environments. Experience with ServiceNow is considered an asset.

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.