Senior System Administrator

IEM•Bangor, ME

7h•Remote

About The Position

IEM is hiring a full-time Senior System Administrator to administer, secure, and optimize enterprise IT infrastructure, with a primary focus on Microsoft 365 GCC High and Azure Government environments. This senior technical leader ensures system availability and performance while maintaining compliance with NIST SP 800-171 and DoW CMMC Level 2 standards. The role may be performed from a home or personal office anywhere in Texas that meets IEM’s requirements.

Requirements

At least five years of progressive experience in enterprise systems administration, infrastructure engineering, or IT operations.
Five years of hands-on Microsoft 365 GCC High administration experience.
Microsoft 365 Certified: Administrator Expert (MS-102) certification.
Ability to obtain and maintain a Department of War (DoW) Secret Security Clearance.
Extensive working knowledge of NIST SP 800-171 and DoW CMMC Level 2 requirements.
Demonstrated experience supporting Controlled Unclassified Information (CUI) environments.
Advanced knowledge of Microsoft Entra ID, Active Directory, Exchange Online, SharePoint Online, Teams, and Intune.
Strong Windows Server, enterprise infrastructure, and cloud administration experience.
Advanced PowerShell scripting and automation capabilities.
Experience implementing cybersecurity controls, identity management, and access policies.
Experience with enterprise backup, disaster recovery, and business continuity.
Excellent analytical, troubleshooting, communication, and problem-solving skills.
For home or personal office work, the location must meet IEM standards, including minimum internet speeds of 25 Mbps upload and 3 Mbps download and a ping rate of 100 ms or less during working hours.
Must have account privileges and access to the internet service provider account during working hours to maintain the connection if needed.

Nice To Haves

Ten years of progressive experience in enterprise systems administration, infrastructure engineering, or IT operations.
Azure Administrator Associate or Azure Solutions Architect Expert certification.
Experience with Microsoft Defender XDR, Microsoft Sentinel, and Microsoft Purview.
Experience with CMMC Level 2 assessments, SSPs, POA&Ms, and remediation activities.
Experience supporting Department of War and federal government contracting environments.
Knowledge of ITIL, change management, and enterprise service management practices.

Responsibilities

Administer and maintain Microsoft 365 GCC High services, including Exchange Online, SharePoint, OneDrive, Teams, and Microsoft Entra ID.
Manage Azure Government infrastructure, Microsoft Intune, Defender, and Microsoft Purview.
Administer enterprise licensing, identity management, security configurations, and access policies.
Implement and maintain MFA, Conditional Access, Privileged Identity Management (PIM), and endpoint compliance policies.
Develop automation using PowerShell, Microsoft Graph, and Power Automate.
Ensure Microsoft cloud configurations meet applicable federal security requirements.
Implement and maintain security controls supporting NIST SP 800-171 and DoW CMMC Level 2 requirements.
Protect and manage Controlled Unclassified Information (CUI) environments.
Support development and maintenance of System Security Plans (SSPs), Plans of Action and Milestones (POA&Ms), and compliance documentation.
Support security assessments, vulnerability remediation, continuous monitoring, and compliance audits.
Maintain technical configurations and evidence required to demonstrate compliance.
Collaborate with security teams, compliance personnel, and external assessors.
Administer Windows Server, Active Directory, Group Policy, DNS, DHCP, and enterprise authentication services.
Manage virtualization, enterprise storage, backup, and disaster recovery solutions.
Monitor system performance, availability, capacity, and security.
Manage patching, upgrades, vulnerability remediation, and infrastructure lifecycle management.
Troubleshoot complex enterprise infrastructure and application issues.
Serve as the senior technical escalation point for complex infrastructure and Microsoft 365 issues.
Lead infrastructure modernization, cloud migration, and cybersecurity projects.
Develop PowerShell scripts and automation to improve operational efficiency.
Establish infrastructure standards, technical documentation, and operational procedures.
Provide technical guidance and mentorship to IT personnel.
Partner with IT leadership on technology strategy, budgeting, and infrastructure planning.