Senior Infrastructure Engineer- Bala Cynwyd, PA

TMNA Services•Bala Cynwyd, PA

2d•Onsite

About The Position

Responsible for engineering, support, and continuous improvement of the Microsoft 365 ecosystem including hybrid Exchange (on-prem and Exchange Online), Teams, SharePoint Online, OneDrive, Microsoft 365 Copilot, Viva suite, and Dynamics 365 integrations. This role serves as a Tier 3 escalation point for complex issues, supports multi-tenant environments, and drives automation, platform stability, and cross-tenant collaboration improvements.

Requirements

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) demonstrating the ability to design, deploy, and manage Microsoft 365 services across Exchange Online, Teams, SharePoint Online, and OneDrive; Microsoft Certified: Identity and Access Administrator Associate (SC‑300) for expertise in Entra ID, conditional access, and identity governance; Microsoft Certified: Azure Administrator Associate (AZ‑104) to support hybrid integrations and Azure dependencies; Microsoft Certified: Security Operations Analyst Associate (SC‑200) or equivalent security certifications focused on threat detection, response, and compliance; and Microsoft 365 Certified: Endpoint Administrator Associate (MD‑102) for endpoint management and device compliance.
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
A bility to juggle multiple, competing, frequently changing time-sensitive deadlines and priorities

Nice To Haves

Certifications in Teams administration (MS‑700), security and compliance, and emerging areas such as Microsoft 365 Copilot or AI administration are also preferred

Responsibilities

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
Diagnoses 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
Participates in on-call rotation and after-hours support as required
Ability to document processes and contribute to knowledge sharing