Senior Infrastructure Engineer – M365

Senior Infrastructure Engineer – Microsoft 365 (Contract) Quick Details

• Location: Hybrid in the Bala Cynwyd, PA area

• Onsite: 1–2 days per week, with additional onsite support as needed

• Duration: Contract through the end of the year with a strong likelihood of extension

• Benefits: Medical, dental, vision, and 401(k) available

• Work Authorization:
  W2 candidates only. Must be authorized to work in the U.S. without current or future sponsorship.

• Interview Process: Phone/Video

We are seeking an experienced Senior Infrastructure Engineer with deep expertise across the Microsoft 365 ecosystem. This role will focus on engineering, administration, support, and continuous improvement of Microsoft 365 services, with an emphasis on SharePoint Online, Microsoft Teams, Entra , Microsoft Purview, Microsoft 365 Copilot, and related collaboration and security platforms.

This position serves as the Tier 3 escalation point for complex Microsoft 365 issues while partnering with infrastructure, security, and application teams to improve platform stability, automation, governance, and user experience.

• Provide Tier 3 support across Microsoft 365 services.

• Administer and troubleshoot Microsoft Teams, SharePoint Online, One Drive, Entra , Microsoft Purview, Defender for Microsoft 365, Microsoft 365 Copilot, Viva Suite, and related Microsoft 365 technologies.

• Support Exchange Online and Hybrid Exchange environments, including mail flow, connectors, transport rules, and hybrid connectivity.

• Manage Microsoft 365 Copilot licensing, policies, user readiness, adoption, and troubleshooting.

• Support Dynamics 365, Microsoft Graph, Power Platform, and SaaS integrations.

• Administer multi-tenant Microsoft 365 environments, including cross-tenant collaboration, B2B access, and identity governance.

• Support tenant-to-tenant migrations, coexistence planning, collaboration migrations, and post-migration remediation.

• Develop Power Shell automation and Microsoft Graph solutions to improve operational efficiency.

• Configure and maintain Conditional Access, DLP, retention policies, sensitivity labels, eDiscovery, Microsoft Purview, and Defender for Microsoft 365.

• Perform root cause analysis and implement long-term solutions for recurring issues.

• Create technical documentation, SOPs, and knowledge base articles.

• Partner with Infrastructure, Security, Operations, and Application teams on enterprise initiatives.

• Drive governance, modernization, and continuous improvement across the Microsoft 365 environment.

• 8+ years of Microsoft infrastructure or Microsoft 365 engineering experience.

• Strong hands-on experience administering Microsoft Teams, SharePoint Online, One Drive, Entra , Microsoft Purview, Defender for Microsoft 365, and Microsoft 365 Copilot.

• Experience supporting Exchange Online and Hybrid Exchange environments.

• Experience with multi-tenant Microsoft 365 administration and cross-tenant collaboration.

• Experience supporting tenant-to-tenant migrations and coexistence scenarios.

• Strong Power Shell scripting and Microsoft Graph experience.

• Experience with Conditional Access, identity governance, MFA, enterprise applications, OAuth, SAML, and modern authentication.

• Strong troubleshooting, analytical, and root cause analysis skills.

• Ability to work independently while collaborating across technical teams.

• Bachelor's degree.

• Microsoft 365 Administrator Expert (MS-102)

• Identity and Access Administrator Associate (SC-300)

• Azure Administrator Associate (AZ-104)

• Security Operations Analyst Associate (SC-200)

• Endpoint Administrator Associate (MD-102)

• Teams Administrator Associate (MS-700)

• Additional Microsoft 365 Security, Compliance, Copilot, or AI certifications are a plus.

• Experience with Microsoft Viva, Power Platform, Dynamics 365 integrations, and Microsoft 365 governance initiatives.