IT Senior Systems Administrator Platform Services

IT Senior Systems Administrator, Platform Services

Not Just a Job… A community. A partnership. A team.

You’ll experience all of these at London Drugs.

As one of Canada’s most successful retail organizations, we’re looking for an experienced and customer-focused Senior IT Systems Administrator to join our Platform Services team.

In this role, you will provide technical leadership and advanced support for the Microsoft technologies and enterprise systems that power our retail stores, corporate offices, distribution centres, and business operations. You will work with modern cloud, identity, endpoint, and infrastructure technologies while helping shape the future direction of our platform services environment.

This role offers the opportunity to lead enterprise technology initiatives, mentor technical teams, and influence the future direction of London’s Microsoft 365, identity, and cloud platform environment.

Work Arrangement:
Full Time in office to start while onboarding, then hybrid (60% onsite, 40% remote)

• Manage and enhance enterprise Microsoft technologies including Microsoft 365, Entra , Intune, Active Directory, and Windows Server environments.
• Support enterprise identity, endpoint management, collaboration, and cloud platforms used across stores, offices, and distribution centres.
• Act as a senior escalation point for complex infrastructure, identity, endpoint, and application‑related issues.
• Lead complex troubleshooting and root cause investigations while driving improvements in system performance, security, reliability, and user experience.
• Design and implement technology solutions that improve security, automation, scalability, and operational efficiency across the organization.
• Provide technical leadership, mentorship, and knowledge sharing to Systems Administrators, Service Desk teams, and other IT professionals.
• Collaborate closely with Infrastructure, Security, Desktop Support, Applications, vendors, and business stakeholders to deliver effective technology solutions.
• Play a key role in cloud adoption, infrastructure modernization, Microsoft platform enhancements, and enterprise technology transformation initiatives.
• Develop and maintain technical standards, procedures, architecture documentation, and knowledge resources.
• Participate in incident, change, problem, and service management processes while supporting continuous improvement initiatives.
• Support scheduled maintenance activities and participate in an on‑call rotation as required.

• 5+ years of experience supporting and administering enterprise IT infrastructure within a medium‑to‑large organization.
• Strong experience administering Microsoft 365, Entra , Active Directory, Intune, Windows Server, and related cloud technologies.
• Advanced troubleshooting and problem‑solving skills within complex enterprise environments.
• Proven ability to act as a senior technical escalation resource for complex infrastructure, identity, endpoint, and application‑related issues.
• Experience mentoring, coaching, or providing technical leadership to administrators, analysts, or support teams.
• Experience leading infrastructure projects, cloud migrations, system implementations, or technology modernization initiatives.
• Strong stakeholder management skills with the ability to translate technical concepts into practical business solutions.
• Experience working within IT Service Management (ITSM) frameworks, including incident, request, change, and problem management.
• Excellent communication, collaboration, and technical documentation skills.
• A customer‑focused mindset with a passion for continuous improvement and operational excellence.

• Microsoft 365, Teams, SharePoint Online, One Drive, and Exchange Online
• Microsoft Entra , Active Directory, Conditional Access, Multi‑Factor Authentication (MFA), Identity & Access Management (IAM), and Identity Governance
• Microsoft Intune, endpoint lifecycle management, device compliance, application deployment, and device management
• Windows Server administration, troubleshooting, and performance optimization
• Power Shell scripting, automation, and operational process improvement
• DNS, DHCP,…