Senior Microsoft 365 Engineer: Identity & Automation

Seneca Resources; Richmond (VA); On-site; USD 90,000 - 130,000; Full time

Job summary

Seneca Resources in Richmond, VA seeks an experienced Microsoft 365 Administrator to optimize and secure enterprise workloads under the M365 G3 license, focusing on Entra ID, Intune, and collaboration apps with scripting to automate operations.

The candidate will monitor service health, enforce security baselines, provide tier-3 escalation, and mentor junior staff, while maintaining thorough documentation.

Qualifications

• 5+ years of hands-on experience administering Microsoft 365 environments.
• Bachelor’s degree in computer science, information technology, or a closely related field; equivalent technical certification accepted.
• Strong proficiency across core M365 workloads: Exchange Online, SharePoint Online, OneDrive, Teams, and Intune.
• Solid understanding of Microsoft Entra ID, including hybrid identity, Entra Connect sync, and identity lifecycle management.
• Experience creating and maintaining PowerShell automation for M365 administration.
• Familiarity with Microsoft security and compliance features (DLP, retention, conditional access, MFA).
• Ability to troubleshoot complex identity, authentication, and service integration issues.
• Experience interpreting and applying Microsoft 365 best practices, governance models, and tenant-level configuration standards.

Responsibilities

• Administer and optimize all services included in the Microsoft 365 G3 license (Exchange Online, SharePoint Online, OneDrive, Teams, Intune, and associated security/compliance features).
• Configure, manage, and troubleshoot Microsoft Entra ID, including Entra Connect sync and identity governance components.
• Maintain M365 security baselines, conditional access policies, MFA, and compliance configurations.
• Implement and support endpoint management using Intune, including device compliance, app deployment, and configuration profiles.
• Develop and maintain PowerShell scripts to automate administrative tasks, reporting, and environment maintenance.
• Manage Exchange Online mail flow, policies, and advanced configuration scenarios.
• Administer Teams architecture, lifecycle governance, channel policies, and voice/phone integrations.
• Oversee SharePoint Online site configuration, permissions, storage governance, and content lifecycle.
• Monitor service health, analyze trends, and proactively address performance or reliability issues.
• Provide tier-3 escalation support for Microsoft 365–related issues and mentor junior team members.
• Maintain documentation for processes, designs, configurations, and change management.

Skills

Microsoft 365 administration

Entra ID management

PowerShell scripting

Security & compliance basics

Identity governance

Education

Bachelor’s degree in Computer Science or Information Technology

Tools

PowerShell

Job description

Seneca Resources in Richmond, VA seeks an experienced Microsoft 365 Administrator to optimize and secure enterprise workloads under the M365 G3 license, focusing on Entra ID, Intune, and collaboration apps with scripting to automate operations.

The candidate will monitor service health, enforce security baselines, provide tier-3 escalation, and mentor junior staff, while maintaining thorough documentation.