IT Infrastructure & Security Specialist

markham, on, Canada • Posted May 29, 2026

Job Type: Full-time
Location: markham, on
Posted: May 29, 2026
Category: Other-General
Application Deadline: July 08, 2026

Role 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 clo...

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