IT Infrastructure & Security Specialist

Frontier Dental CA; Markham; On-site; CAD 80,000 - 100,000; Full time

Job summary

A dental practice located in Markham, Canada seeks an experienced IT Infrastructure & Security Specialist to enhance its IT Operations. The ideal candidate will have strong expertise in managing Microsoft 365, Azure, and AWS infrastructure, ensuring cybersecurity, and providing L1/L2 technical support. This role involves maintaining secure operations and reinforcing cybersecurity, including management of Enterprise Security tools. Candidates with 5–7+ years of relevant experience are encouraged to apply.

Qualifications

• 5–7+ years of experience in IT infrastructure, systems administration, or similar roles.
• Hands-on experience administering Microsoft 365 environments.
• Experience managing Azure and AWS cloud infrastructure.
• Strong knowledge of networking, VPNs, firewalls, and virtual networks.
• Experience supporting IT Helpdesk / L1-L2 support.

Responsibilities

• Administer and maintain Microsoft 365 services.
• Support and maintain Azure and AWS cloud infrastructure.
• Manage VPN connectivity and networking infrastructure.
• Administer and support VoIP and cloud telephony platforms.
• Investigate security alerts and assist with incident response.

Skills

Microsoft 365

Azure

AWS

Networking

Cybersecurity

SQL databases

Technical support (L1-L2)

Knowledge of firewalls and VPNs

Tools

Microsoft Defender

PowerShell

Job description

Overview

We are seeking an IT Infrastructure & Security Specialist to join our IT Operations team. This role combines cloud infrastructure management, cybersecurity operations, networking, and L1/L2 technical support.

The ideal candidate has strong experience managing Microsoft 365, Azure, AWS infrastructure, networking, and enterprise systems, while also supporting internal users and maintaining secure, reliable IT operations in a fast-growing organization. The role also plays an important part in maintaining Frontier’s security posture, including security tooling, monitoring, and internal security awareness initiatives.

Key Responsibilities

• Infrastructure & Cloud Operations
• Administer and maintain Microsoft 365 services including Entra ID (Azure AD), Exchange Online, SharePoint, endpoint management, and security configurations.
• Support and maintain Azure and AWS cloud infrastructure, including virtual networks, access controls, system monitoring, and connectivity.
• Manage VPN connectivity, networking infrastructure, firewalls, and virtual networks to ensure secure and reliable connectivity across systems and users.
• Maintain and support SFTP servers and secure file transfer processes used for business integrations.
• Assist with maintenance, monitoring, and troubleshooting SQL databases supporting internal applications and integrations.
• Administer and support VoIP and cloud telephony platforms (such as RingCentral), including user provisioning, call routing, integrations, and troubleshooting.

• Cybersecurity
• Administer and monitor Microsoft Defender and other enterprise security platforms used for endpoint, identity, and email protection.
• Investigate security alerts, assist with incident response, and support vulnerability remediation and access management practices including MFA enforcement.
• Help maintain Frontier’s overall security posture through monitoring, policy enforcement, and collaboration with leadership on security initiatives.
• Lead internal security awareness initiatives, including employee security training programs and simulated phishing campaigns.
• Coordinate with external security vendors to conduct periodic penetration testing and vulnerability assessments, including managing testing scope, scheduling, remediation tracking, and follow-up verification.

• IT Support & Business Systems
• Provide L1–L2 technical support for employees across the organization, troubleshooting issues related to Microsoft 365, ERP, networking, and SaaS platforms.
• Manage user provisioning, permissions, device setup, and access controls across enterprise systems.
• Collaborate with internal teams to resolve system issues, improve reliability, and document processes and solutions.

Required Qualifications

• 5–7+ years of experience in IT infrastructure, systems administration, or similar roles.
• Hands-on experience administering Microsoft 365 environments, including identity and security management.
• Experience managing Azure and AWS cloud infrastructure.
• Strong knowledge of networking, VPNs, firewalls, and virtual networks.
• Experience supporting IT Helpdesk / L1-L2 support in a business environment.
• Experience maintaining SFTP servers and secure file transfer processes.
• Experience with SQL database maintenance, backups, and troubleshooting.
• Experience supporting ERP systems (preferably Acumatica) and other SaaS business applications.
• Experience administering Microsoft Defender or comparable enterprise security platforms.

Nice to Have

• Experience with PowerShell or scripting for automation
• Experience working in e-commerce environments
• Experience supporting or maintaining infrastructure for chatbots, AI tools, or conversational platforms
• Experience supporting or maintaining data warehouse infrastructure and data pipelines