Network & Systems Administrator / Tier III

HRB; Washington (District of Columbia); On-site; USD 62,000 - 69,000; Part time

Job summary

HRB seeks a Network & Systems Administrator (Tier III) to support a hybrid Microsoft-based IT environment. The role combines advanced end-user support with systems administration across infrastructure and users.

Responsibilities include managing Microsoft 365, hybrid AD (on-prem and Azure Entra ID), and Azure cloud services, plus PowerShell scripting to automate large-scale changes and maintenance. The position is on-site in Washington, DC, with a contract-to-hire arrangement.

Qualifications

• Bachelor's degree in Information Technology, Computer Science, or related field.
• 5+ years of experience in systems and network administration.
• Strong experience in Microsoft 365 administration and configuration.
• Hands-on experience with Active Directory (on-prem and hybrid environments).
• Experience with Azure (cloud services and management), Entra ID (Azure AD), Microsoft Defender, SCCM, and Intune.
• Advanced PowerShell scripting experience (automation, bulk actions, reporting).
• Experience supporting LAN/WAN environments and Tier III support.

Responsibilities

• Administer and configure Microsoft 365 environment, including user management and service optimization.
• Manage hybrid Active Directory (on-premises and Azure AD/Entra ID) environments.
• Support and maintain Azure cloud infrastructure, including Azure resource management.
• Administer tools such as Microsoft Defender, SCCM, Intune, and Azure Management services.
• Support LAN/WAN network infrastructure across corporate and field offices.
• Perform system patching, upgrades, and maintenance across servers and endpoints.
• Develop and maintain PowerShell scripts to automate administrative tasks.
• Provide advanced (Tier III) technical support for complex system and user issues.

Skills

PowerShell scripting

Microsoft 365 administration

Active Directory

Azure

Entra ID

Microsoft Defender

Education

Bachelor's degree in Information Technology

Tools

SCCM

Intune

Job description

• Washington, DC

Location:Washington, DC (On-site, 5 days/week, 8:30 AM - 5:30 PM)
Employment Type:Contract-to-Hire
Hourly rate: 45-50/hr.

Overview

We are seeking a highly skilledNetwork & Systems Administrator (Tier III)to support and maintain a hybrid Microsoft-based IT environment. This role bridgesadvanced end-user support and systems administration, requiring a hands-on professional who can operate across both infrastructure and user-facing responsibilities.

The ideal candidate will have strong experience inMicrosoft 365 administration, hybrid Active Directory environments, and PowerShell scripting, with the ability to manage and automate large-scale system changes.

Key Responsibilities

• Administer and configureMicrosoft 365 (M365)environment, including user management and service optimization
• Manage hybridActive Directory (on-premises and Azure AD/Entra ID)environments
• Support and maintainAzure cloud infrastructure, including Azure resource management
• Administer tools such asMicrosoft Defender, SCCM, Intune, and Azure Management services

Network & Infrastructure Support

• SupportLAN/WAN network infrastructureacross corporate and field offices (Phoenix, Los Angeles, and remote users)
• Performsystem patching, upgrades, and maintenanceacross servers and endpoints
• Assist with light infrastructure management acrosscloud and on-premises servers
• Provideadvanced (Tier III) technical supportfor complex system and user issues
• Act as an escalation point between help desk/end-user support and engineering teams
• Support a distributed workforce with both on-site and remote users

Automation & Scripting

• Develop and maintainPowerShell scriptsto automate administrative tasks
• Perform bulk user and system management tasks (e.g., account provisioning, deprovisioning, updates)
• Execute large-scale changes such asbulk account disabling, cleanup, and device wiping

Provisioning & User Lifecycle Management

• Manage user onboarding and offboarding processes within AD/M365
• Provision devices and user accounts in accordance with company policies
• Ensure secure and efficient access management across systems

Required Qualifications

• Bachelor’s degree in Information Technology, Computer Science, or related field
• 5+ years of experience insystems and network administration
• Strong experience inMicrosoft 365 administration and configuration
• Hands-on experience with:
  • Active Directory (on-prem and hybrid environments)
  • Azure (cloud services and management)
  • Entra ID (Azure AD)
  • Microsoft Defender, SCCM, and Intune
• AdvancedPowerShell scripting experience(automation, bulk actions, reporting)
• Experience supportingLAN/WAN environments
• Ability to operate at aTier III support level

Preferred Qualifications

• Experience working inhybrid cloud environmentstransitioning from on-prem to cloud
• Familiarity withendpoint management in cloud-based environments
• Strong troubleshooting and problem-solving skills across both systems and networks
• Experience supportingmulti-site organizations with remote users

Key Traits for Success

• Ability to work across bothend-user support and infrastructure management
• Strong attention to detail with a focus onautomation and efficiency
• Proactive mindset in identifying and resolving system issues
• Excellent communication skills for cross-functional collaboration