Constellation HomeBuilder Systems is seeking a Senior Systems Administrator / M365 & Infrastructure Administrator to join our Information Technology team in Markham, Ontario. This role will be responsible for the administration, security, governance, and strategic operation of our Microsoft 365 environment, Microsoft Entra ID platform, endpoint management systems, and collaboration technologies. The position will own technology services and responsibilities transitioning from shared corporate IT services as part of our integration with Jonas.

The successful candidate will serve as a senior technical resource responsible for identity and access management, Microsoft 365 administration, endpoint management, collaboration platforms, security governance, and infrastructure support. Administer and maintain Microsoft Entra ID Design and administer Conditional Access policies Manage Microsoft licensing and group-based assignments Maintain role-based access controls and security standards Microsoft 365 Administration Administer Microsoft 365 services including: Exchange Online SharePoint Online Power BI Manage retention and compliance policies Administer SPF, DKIM, and DMARC configurations Implement and maintain Microsoft security controls Support tenant governance and security best practices Monitor service health and platform performance Evaluate and implement new Microsoft 365 capabilities Administer Microsoft Intune Manage Windows Autopilot deployments Develop and maintain device compliance policies Manage application deployment and lifecycle management Oversee workstation configuration standards Support remote workforce technologies Administer Microsoft Teams Phone Support TouchPoint and related communication systems Manage call routing, auto attendants,



and user provisioning Support core Windows infrastructure services Assist with cloud and hybrid infrastructure administration Participate in disaster recovery and business continuity planning 7+ years of IT infrastructure and systems administration experience ~5+ years administering Microsoft 365 environments ~ Solid experience with Microsoft Entra ID ~ Experience implementing and supporting SSO and Conditional Access ~ Experience with Exchange Online, SharePoint Online, and Teams ~ Experience administering Microsoft Intune and Windows Autopilot ~ Strong understanding of Microsoft licensing and tenant governance ~ Experience supporting cybersecurity and compliance initiatives ~ Microsoft certifications such as: Microsoft Certified: Microsoft Certified: Microsoft Certified: Microsoft Certified: Experience with Teams Phone Experience with Power BI administration Experience with Palo Alto Networks security solutions Experience supporting mergers, acquisitions, or tenant migrations Experience working in SaaS or software organizations Maintain a secure and compliant Microsoft 365 environment Successfully assume and operate services transitioning from shared corporate IT functions The estimated base salary range for this role is CAD$90,000.00 - CAD$110,000.00 per year. The posted range is a good faith estimate and reflects factors that are subject to change.

We recognize the value and importance of diversity and inclusion in our communities and in the workplace. We celebrate diversity and one of our goals as an employer is to create an inclusive work environment for all employees. We are an equal opportunity employer and do not discriminate against any employee or applicant because of race, religion, sex, sexual orientation including gender identity or expression, pregnancy, national origin, age, marital status, veteran status, disability status, or any other category or characteristic protected by law.

Applicants with disabilities who would like to require a reasonable accommodation related to any part of the application process may contact us at Perseus_HR@constellationhbs.

📌 Senior Systems Administrator& Infrastructure (Markham)
🏢 Perseus Group, Constellation Software
📍 Markham