Network Security Specialist

STACK IT Recruitment•Richmond Hill, ON

11d•CA$100,000 - CA$110,000•Onsite

About The Position

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.

Requirements

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 Haves

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

Responsibilities

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