Senior Security Specialist

🛡️Are you passionate about protecting critical systems, strengthening security posture, and staying one step ahead of emerging threats?

We're partnering with a well-established organization seeking a Network Security Specialist to take ownership of enterprise security across network infrastructure, cloud environments, systems, and retail locations. This is a highly impactful role where you'll play a key part in safeguarding business operations, improving cybersecurity resilience, and driving security best practices across the organization.

This opportunity is ideal for someone who enjoys both strategic security initiatives and hands-on technical work. You'll be involved in everything from threat detection and incident response to vulnerability management, network hardening, cloud security, and infrastructure protection.

💻 Who You Are

• You are a proactive cybersecurity professional who enjoys identifying risks before they become problems.
• You're equally comfortable investigating security incidents, hardening infrastructure, and collaborating with technical teams to improve overall security posture.
• You bring strong networking and infrastructure knowledge, understand modern cybersecurity threats, and enjoy working in environments where you can make a visible impact.
• You thrive in fast-paced environments, take ownership of security initiatives, and continuously look for ways to strengthen systems and processes.

📍 Work Type

• Location: Richmond Hill, Ontario (Fully On-Site – 5 days a week in office)
• Vacancy Type: This is a newly created position
• This position requires on-site work with occasional after-hours support for security incidents, upgrades, patching activities, and emergency response situations

Requirements

🎯 What You'll Do

• Monitor enterprise systems, network traffic, cloud infrastructure, and endpoints for threats, vulnerabilities, and suspicious activity
• Lead cybersecurity incident investigations, containment, remediation, and recovery efforts
• Perform root cause analysis and recommend preventative measures following security incidents
• Develop and enhance incident response procedures, escalation processes, and security controls
• Secure and maintain enterprise network infrastructure, including firewalls, switches, routers, VPNs, VLANs, wireless networks, and internet-facing services
• Manage firewall policies, network segmentation, IDS/IPS solutions, secure remote access, and access controls
• Configure and maintain security controls across corporate offices, cloud environments, and retail locations
• Perform vulnerability assessments, risk analyses, security audits, and remediation planning
• Implement infrastructure hardening and security best practices across servers, databases, cloud workloads, and network devices
• Manage system patching, firmware updates, certificate renewals, and security configuration baselines
• Support identity and access management initiatives, including MFA and least-privilege access models
• Ensure the security of Linux-based environments, virtualization platforms, and cloud-hosted infrastructure
• Monitor and secure enterprise email systems, DNS services, web servers, authentication services, and certificates
• Support backup validation, disaster recovery planning, ransomware prevention, and business continuity initiatives
• Participate in security reviews, compliance activities, audits, and cybersecurity assessments
• Maintain technical documentation, security standards, incident logs, and operational procedures
• Recommend and implement improvements to strengthen the organization's overall security posture

⭐ What We're Looking For

• 5+ years of experience in network security, cybersecurity operations, infrastructure security, or systems security roles
• Strong hands-on experience securing enterprise network environments
• Deep knowledge of Linux administration from a security perspective (CentOS, Ubuntu, or similar)
• Experience securing Azure cloud environments, including identity and access management
• Hands-on experience with Kubernetes security, particularly Azure Kubernetes Service (AKS)
• Strong understanding of networking protocols including TCP/IP, DNS, HTTPS, SMTP, LDAPS, VPNs, VLANs, and firewall technologies
• Experience administering enterprise network equipment such as Cisco Meraki, Unifi, or similar platforms
• Experience with vulnerability management, endpoint protection, infrastructure monitoring, and security remediation
• Strong understanding of cybersecurity frameworks, access control, system hardening, and threat mitigation practices
• Experience securing web infrastructure, including Apache, Nginx, SSL/TLS certificates, and web application security
• Familiarity with virtualization platforms such as VMware and Hyper-V
• Knowledge of email security and Microsoft Exchange administration
• Experience with scripting and automation using Python, PowerShell, Shell scripting, or similar technologies
• Strong troubleshooting, analytical, and incident response capabilities
• Excellent communication skills with the ability to collaborate across technical and business teams

Nice-to-Have

• Security certifications such as CISSP, CISM, Security+, CEH, AZ-500, or equivalent
• Experience supporting multi-site enterprise environments
• Experience within retail, distribution, or highly distributed infrastructure environments
• Exposure to compliance frameworks and security audits

🔥 What Makes This Role Exciting

• Own Security End-to-End: Play a critical role in protecting enterprise infrastructure across network, cloud, systems, and endpoint environments.
• Make a Visible Impact: Your work will directly influence business continuity, risk reduction, and overall cybersecurity resilience.
• Technical Variety: Work across networking, cloud security, Linux administration, identity management, infrastructure hardening, vulnerability management, and incident response.
• Modern Technology Environment: Gain exposure to Azure, Kubernetes, enterprise networking, virtualization platforms, and evolving cybersecurity technologies.
• Strategic & Hands-On: Balance day-to-day operational security with long-term initiatives that strengthen the organization's security posture.

Benefits

• Base Salary: $100,000 - $110,000
• Paid Time Off: 2 weeks' vacation
• Health & Dental Benefits: Comprehensive coverage for your health and well being!
• Stable Environment: Join a well-established organization investing in its technology and security infrastructure

📩 Ready to Elevate Your Career? Apply Now!

At STACK IT Recruitment, we connect top talent with standout opportunities. If you meet at least 70% of the qualifications, we encourage you to apply—we'd love to chat!

Know someone perfect for this role? Share this opportunity with your network—you might help someone take the next big step in their career.

✨ We're proud to support diversity and inclusion. Need accommodation during the hiring process? Just let us know—we're here to support you!

AI Use Disclosure

STACK IT uses AI-enhanced tools to support initial candidate screening and interview note analysis. All assessments and hiring decisions remain human-led.