Senior IT Administrator

Factorial Energy•Billerica, MA

6h•$90,000 - $130,000

About The Position

We are seeking a Senior IT Administrator to help operate, secure, and continuously improve our enterprise IT environment. This is a hands‑on, senior role with responsibility spanning Microsoft 365, endpoint management, security controls, and broader IT operations. The ideal candidate is technically strong, collaborative, and service‑oriented, comfortable partnering with teams across the organization to resolve issues, improve workflows, and strengthen overall system effectiveness in a dynamic startup environment.

Requirements

5+ years of dedicated hands‑on experience in systems administration roles
~10 years of total IT experience across infrastructure, systems, and user support environments
Deep experience managing Microsoft 365, ideally in an E5‑licensed environment
Practical, production experience with: Microsoft Entra ID / Azure AD Conditional Access & MFA Microsoft Intune Microsoft Defender (Endpoint, Office 365) Data Loss Prevention and information protection controls
Comfortable working in a small, fast‑moving organization where responsibilities span platforms, projects, and user support
Strong communication skills and a collaborative, service‑oriented mindset

Nice To Haves

Experience supporting regulated environments, audits, or compliance initiatives
PowerShell scripting for automation, reporting, and administration
Relevant Microsoft certifications (M365, Security, or Endpoint)

Responsibilities

Own day‑to‑day administration of Microsoft 365, including Exchange Online, SharePoint Online, OneDrive, Teams, and related services
Maintain governance for permissions, external sharing, retention, and secure collaboration
Manage Microsoft 365 licensing, service configuration, and tenant health
Administer Microsoft Entra ID (Azure AD) including user lifecycle, groups, RBAC, and identity troubleshooting
Design, implement, and maintain Conditional Access, MFA, and baseline identity security controls
Operate and optimize Microsoft Defender services, including: Defender for Endpoint Defender for Office 365
Implement and maintain Microsoft Purview capabilities, including: Sensitivity labels / Information Protection Data Loss Prevention (DLP) across M365 workloads
Support security investigations, control tuning, and audit‑ready configurations
Contribute to IT workstreams supporting SOX and TISAX compliance, including process execution, evidence collection, access reviews, and control documentation
Own Microsoft Intune for device enrollment, compliance policies, configuration profiles, and application deployment
Improve endpoint security posture, patching, and device lifecycle management across Windows, macOS, and mobile platforms
Partner with teams across the organization to resolve technical issues, improve workflows, and enhance overall system effectiveness
Provide senior‑level technical support and guidance for complex or escalated IT issues
Contribute to documentation, SOPs, and operational runbooks
Support platform administration, user support, and project‑based work as organizational needs evolve