Senior Microsoft 365 & Cloud Infrastructure Lead

Market Street Talent, Inc.

Portsmouth (NH)

On-site

USD 90,000 - 135,000

Full time

3 days ago

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Job summary

Market Street Talent is seeking an experienced Senior Systems Administrator to join our client’s team in New Hampshire. You will administer, optimize, and support Microsoft cloud technologies and enterprise infrastructure, focusing on Microsoft 365, Entra, and Intune, with an emphasis on automation.

The ideal candidate is hands-on, with strong identity and access management, endpoint administration, and infrastructure operations experience.

Qualifications

Bachelor's degree or equivalent professional experience in IT.
5+ years in a senior systems administration, infrastructure, or technical operations role.
Strong expertise with Microsoft 365, including Exchange Online, Teams, SharePoint, OneDrive, and Entra ID.
Hands-on experience with Intune, endpoint management, software deployment, and device administration.
Experience supporting hybrid identity environments with AD, Entra ID Connect, MFA, and Conditional Access.
Proficiency in PowerShell scripting and process automation.
Knowledge of infrastructure administration, backup/recovery, security best practices, and monitoring.
Experience managing software licensing and IT asset controls.
Strong analytical, troubleshooting, and communication skills.
Leadership experience mentoring teams.

Responsibilities

Serve as Microsoft 365 and Entra expert, supporting Exchange Online, Teams, SharePoint, OneDrive.
Administer and optimize the Microsoft 365 environment, including licensing and security controls.
Manage identity and access solutions, MFA, CA policies, and AD synchronization.
Oversee endpoint management via Intune, including provisioning and lifecycle management.
Support and maintain on‑premises and cloud infrastructure across servers and workstations.
Assist in security monitoring, backups, vulnerability management, and incident response.
Provide advanced troubleshooting and escalation for complex issues.
Create automation with PowerShell and Power Automate to improve efficiency.
Document configurations, procedures, and user knowledge resources.
Research and implement new technologies to improve reliability and security.
Collaborate with vendors and stakeholders to deliver IT services and projects.
Participate in after‑hours support and travel to locations as needed.