Job Title: Infrastructure ArchitectTeam: Technology Services (Information Technology)Reports To: Senior Infrastructure Engineering ManagerLocation: Toronto, Ontario. (4 days in office, 1 day remote)Employment Type: Permanent Full-TimeAbout the RoleThe Infrastructure Architect is the senior technical engineer for 123Dentist's server, identity, cloud, and network infrastructure, combining deep hands-on design and engineering with escalation support and project delivery across a Microsoft-centric, multi-site environment.
The role is balanced across three areas: infrastructure transformation and project delivery (cloud migrations, identity modernization, endpoint-management standardization), Tier 2/3 escalation support for the most complex infrastructure, identity, cloud, and network issues, and mergers & acquisitions / practice integration, onboarding newly acquired practices into the 123Dentist environment. Operating with significant independence, you'll act as a trusted technical authority, mentoring infrastructure engineers, service desk analysts, and operations team members while championing sound engineering standards, security, and reliability.
What You'll Do- Serve as the Tier 2/3 escalation point for complex infrastructure, identity, cloud, and network incidents, driving them through to root-cause resolution
- Diagnose and resolve advanced issues across Windows Server, Active Directory, Entra ID, Microsoft Intune, Microsoft 365, Azure, and the LAN/WAN and firewall layers
- Lead major-incident response for infrastructure-impacting outages, coordinating with IT and business stakeholders and communicating status clearly to leadership
- Mentor and coach Tier 1 and Tier 2 analysts, producing runbooks and technical documentation that build the team's troubleshooting capability
- Independently design, plan, and deliver infrastructure transformation initiatives across on-premises and cloud, including server consolidation, migrations, identity modernization, endpoint-management standardization, and network refreshes
- Engineer and administer Microsoft Azure infrastructure, including landing zone design, virtual machines, networking, storage, backup, and cost optimization
- Lead hybrid identity initiatives spanning on-premises Active Directory and Entra ID, including conditional access, MFA, and RBAC
- Modernize and standardize endpoint management through Microsoft Intune, and automate provisioning and configuration using PowerShell and infrastructure-as-code
- Lead the technical engineering workstream to integrate newly acquired practices into the 123Dentist environment, including identity, endpoints, network, and core systems
- Partner with IT leadership and the Corporate Development / M&A team on due-diligence and integration planning, standardizing and securing clinic infrastructure as new sites join the network
What You Bring- Bachelor's degree in Information Technology, Computer Science, or a related field, or equivalent hands-on experience
- 7-8+ years in systems/infrastructure engineering or senior systems administration, including hands-on Tier 2/3 escalation in a Microsoft-centric enterprise environment
- Demonstrated experience independently leading infrastructure transformation projects spanning multiple teams or departments (cloud adoption/migrations, identity or endpoint modernization, network refreshes)
- Experience supporting a multi-site, distributed environment (healthcare, DSO, retail, or similar) is an asset; experience with M&A / site integration is a strong asset
- Expert-level Windows Server administration and deep hybrid identity expertise (on-premises Active Directory and Entra ID, conditional access, MFA, RBAC)
- Strong Microsoft Azure engineering skills, including IaaS, virtual networking, storage, backup, security, and cost management
- Experience with Microsoft Intune / modern endpoint management and LAN/WAN and network engineering (routing, VLANs, VPN, DNS/DHCP, firewalls)
- PowerShell scripting and automation experience, with working familiarity in endpoint security, backup/DR, and ITSM tooling
- Microsoft certifications (e.g., AZ-104/AZ-305, MD-102, SC-300) or equivalent networking/security certifications (CCNA, Security+, ITIL) are an asset
- Strong sense of ownership, excellent analytical and problem-solving abilities, and a collaborative approach to mentoring across teams
Why Join 123Dentist?- Play a central, high-visibility role in modernizing IT infrastructure for a fast-growing national organization
- Operate with real autonomy as a trusted senior technical authority
- Work across a modern, cutting-edge cloud, identity, and endpoint technology stack
- Be part of a collaborative team that values mentorship and engineering excellence
