Senior Infrastructure Engineer

Essential Job Functions

• Provides Tier 3 (L3) escalation support for Microsoft 365 services including hybrid Exchange
• Troubleshoots complex issues across Exchange Online, Teams, SharePoint Online, OneDrive, and integrations
• Diagnostics and resolves mail flow, connectors, transport rules, and hybrid connectivity issues
• Supports Microsoft 365 Copilot including licensing, access, and application integration troubleshooting
• Supports Dynamics 365 and SaaS platform integrations with Microsoft 365
• Supports multi-tenant environments including cross-tenant collaboration, identity, and access scenarios
• Troubleshoots cross-tenant issues including sharing, authentication, and mail routing
• Supports tenant-to-tenant migrations, domain cutovers, and coexistence scenarios
• Performs root cause analysis and implements long-term solutions for recurring issues
• Executes automation using PowerShell and supports Graph API-based automation
• Supports M365 security configurations including Conditional Access, DLP, and retention policies
• Creates SOPs, QRGs, and technical documentation to improve supportability
• PARTNERS WITH OPERATIONS TEAMS TO REDUCE REPEAT INCIDENTS AND IMPROVE ESCALATION HANDLING
• Collaborates with Infrastructure, Security, and Application teams on cross-platform initiatives
• SUPPORTS ONGOING PLATFORM IMPROVEMENTS AND MODERNIZATION EFFORTS ACROSS THE M365 ENVIRONMENT
• PERFORMS ON-CALL ROTATION AND AFTER-HOURS SUPPORT AS REQUIRED

Qualifications

• Bachelor's degree preferred
• Experience supporting Microsoft 365 environments including Exchange Online, Teams, SharePoint Online, and OneDrive
• Hands-on experience with Exchange Hybrid (on-prem Exchange + Exchange Online)
• Experience with mail flow, connectors, and transport troubleshooting
• Exposure to Microsoft 365 Copilot and Viva suite
• Experience with multi-tenant M365 environments or cross-tenant collaboration
• Experience with tenant-to-tenant migrations or coexistence scenarios
• Working knowledge of PowerShell and automation scripting
• Understanding of Entra ID (Azure AD), including identity and access management
• Relevant certifications: Microsoft 365 Certified: Administrator Expert (MS‑102), Microsoft Certified: Identity and Access Administrator Associate (SC‑300), Microsoft Certified: Azure Administrator Associate (AZ‑104), Microsoft Certified: Security Operations Analyst Associate (SC‑200), and Microsoft 365 Certified: Endpoint Administrator Associate (MD‑102)
• Certifications in Teams administration (MS‑700), security and compliance, and emerging areas such as Microsoft 365 Copilot or AI administration are also preferred
• Familiarity with authentication protocols (OAuth, SAML, modern authentication)
• Strong troubleshooting, analytical, and problem-solving skills
• Ability to work independently and as part of a team without supervision
• 7+ years of relevant experience required
• Strong Knowledge of typical organizational politics and political tactics; ability to effectively navigate formal and informal communication and decision-making channels
• Strong Knowledge, insight, and understanding of business concepts and processes that are needed for making sound decisions in the context of the company's business; ability to apply this knowledge appropriately to diverse situations
• Demonstrate Strong analytical ability with the capability to determine the root cause of problems and issues and provide solutions
• Strategic thinking; Applies organizational acumen to identify and maintain focus on key success factors for the organization
• Superior attention to detail
• Ability to juggle multiple, competing, frequently changing time-sensitive deadlines and priorities