Senior System Administrator

IEM is looking for a Full-Time Senior System Administrator who will administer, secure, and optimize the organization’s enterprise IT infrastructure, focusing primarily on Microsoft 365 GCC High and Azure Government environments. Serving as a senior technical leader, they will ensures system availability and performance while maintaining strict compliance with NIST SP 800-171 and DoW CMMC Level 2 standards.

Primary Location:

• Live anywhere in the state of Texas that meets personal office / at homework requirements.
• Work from a home or personal office location that meets IEM standards.

Essential Functions: 

Microsoft 365 GCC High & Cloud Administration

• Administer and maintain Microsoft 365 GCC High, 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.

Cybersecurity, NIST & CMMC Compliance

• 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.

Enterprise Infrastructure & Systems Administration

• 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.

Technical Leadership & Automation

• 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.

 Minimum Qualifications: 

• Experience: Five(5) + years of progressive experience in enterprise systems administration, infrastructure engineering, or IT operations.
• 5 years of hands-on experience in Microsoft 365 GCC High administration experience.
• Certification :Microsoft 365 Certified: Administrator Expert (MS-102) certification required.
• Clearance: Must be able 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.

Preferred Qualifications: 

• Experience:  Ten (10) years of progressive experience in enterprise systems administration, infrastructure engineering, or IT operations
• Certification : Azure Administrator Associate or Azure Solutions Architect Expert.
• 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. 

Additional Information:

• Office Locations: Often, these offices are either owned by the client we work with or by IEM. All candidates are expected to follow any rules and regulations of the office in which they are required to work for that project. 
• Personal Office/home locations: All personal office work environments require the ability to maintain minimum Internet speeds of 25 Mbps upload and 3 Mbps download, as well as a ping rate of 100 ms or less during working hours, regardless of the type and number of devices using your Internet connection. You must also have account privileges and access to your Internet service provider account during working hours for the purpose of maintaining the Internet connection, if needed.  

Benefits and More:

• 10 paid holidays
• Vacation pay
• Sick pay
• 401(k) plan with company matching
• Company-paid short-term disability and long-term disability coverage 

Equal Employment Opportunity. All IEM employment decisions, including recruiting, hiring, placement, training availability, promotion, compensation, evaluation, disciplinary actions, and termination of employment, if necessary, are made without regard to an individual’s race, color, religion, creed, sex (including sexual orientation, gender identity, and gender expression), national origin, ancestry, age, physical or mental disability, medical condition, genetic information, pregnancy (including childbirth and related medical conditions), marital status, military or veteran status, citizenship or immigration status, or any other characteristic protected under applicable law.

Reasonable Accommodation. IEM is committed to providing reasonable workplace accommodations for individuals with disabilities. If you require assistance or reasonable accommodation during any part of the application or employment process, please email.