Tier 3 IT Service Desk Lead

trexsolutions; Washington (District of Columbia); On-site; USD 140,000 - 170,000; Full time

Job summary

T-Rex Solutions, LLC is seeking a Tier 3 IT Service Desk Lead to support the Department of Commerce in Washington, DC. The role requires expert troubleshooting, elevated identity management, and extensive M365/Azure administration.

On-site work at the Herbert Hoover building with standard business hours and occasional events or emergencies. Responsibilities include leading complex incidents, automating tasks with PowerShell, and coordinating with engineering and security teams to ensure

Qualifications

• Active Top Secret clearance is required.
• Extensive experience administering Microsoft 365 and Azure services.
• Advanced Active Directory administration and group policy management.
• Proven experience with ITSM modules (Incident, Problem, Change, Knowledge, Request Fulfillment).
• Practical PowerShell scripting ability to automate tasks and integrate systems.

Responsibilities

• Provide expert-level troubleshooting across all support tiers.
• Lead advanced account and identity management with elevated permissions.
• Manage complex M365/Azure and AD administration and ServiceNow configuration.
• Perform deep technical analysis across systems, networks, applications, and infrastructure.
• Coordinate with engineering, cybersecurity, and infra teams to resolve high-impact incidents and drive root-cause analysis.
• Develop and maintain technical procedures, knowledge articles, and troubleshooting guides.

Skills

Top Secret clearance

Microsoft 365 administration

Azure administration

Active Directory administration

PowerShell scripting

ITSM / ITIL processes

Incident/Problem/Change management

Tools

ServiceNow

PowerShell

Job description

T-Rex Solutions is looking to select a Tier 3 IT Service Desk Lead to support our Department of Commerce (DOC) Office of Solution and Service Delivery (OSSD) customer.

Within the DOC, the OSSD provides IT support for the Department of Commerce's Office of the Chief Information Officer (OCIO), Office of the Secretary (OS), and other bureau partners. Under this program, we will provide comprehensive IT service desk support, ensuring continuous and efficient resolution of technical issues. It includes help desk operations, incident management, service request fulfillment, and escalation handling from Tier 0 through Tier 3 support. Service hours of support are Monday through Friday 7:00am-6:00pm (desk-side support) and (walk-up help desk) or as needed such special events or emergency requirements. Work is performed on-site at the Herbert Hoover building in Washington, DC.

Responsibilities:

• The Tier 3 Service Desk Lead shall be responsible for providing expert-level troubleshooting, overseeing complex incident and problem resolution, and ensuring technical quality across all support tiers.
• Provide advanced technical services for resolving complex and escalated IT issues with elevated administrative permissions. Responsibilities include advanced account and identity management, deep-dive diagnostics, root cause analysis, and long-term problem resolution for infrastructure components.
• Provide subject matter expertise in advanced administration and troubleshooting across M365/Azure and Active Directory, performing complex ServiceNow configuration and fulfillment activities, and applying PowerShell scripting to automate, optimize, and resolve elevated technical issues.
• Perform deep technical analysis across systems, networks, applications, and infrastructure.
• Provide advanced account and identity management services, including, but not limited to administration of Microsoft 365, Active Directory, service and privileged accounts, access controls, PIV exemptions, MFA updates, and support for employee onboarding, offboarding, and internal moves.
• Deliver messaging, collaboration, and data services support, including, but not limited to resolution of email and mailbox issues, calendar and OneDrive access, licensing administration, shared drive permissions, data recovery, and data purging in accordance with retention and compliance requirements.
• Support data governance and compliance activities, including, but not limited to FOIA and eDiscovery searches, data retrieval, and access management in accordance with established policies.
• Perform Tier 3 service desk operations and automation, utilizing ServiceNow for advanced ticket handling and PowerShell scripting to improve efficiency, while ensuring compliance with LAN SOPs and security standards.

Requirements:

• Active Top Secret clearance required
• Extensive experience administering Microsoft 365 and Azure services, including tenant management, identity and access configuration, security controls, Exchange Online, Teams, SharePoint Online, and Azure AD/Entra ID.
• Advanced Active Directory administration, including group policy management, OU design, account lifecycle operations, authentication troubleshooting, and integration with cloud identity services.
• Proven experience using ITSM modules such as Incident, Problem, Change, Knowledge, and Request Fulfillment.
• Practical knowledge of the PowerShell scripting language, including the ability to automate administrative tasks, perform bulk operations, and support system integrations.
• Demonstrated success resolving complex, multi-tier technical issues and serving as an escalation point for lower-tier support teams.
• Experience coordinating with engineering, cybersecurity, and infrastructure teams to resolve high-impact incidents and drive root-cause analysis.
• Strong background in enterprise IT operations, including monitoring, diagnostics, and adherence to ITIL-aligned processes.
• Documented ability to develop and maintain technical procedures, knowledge articles, and troubleshooting guides to support continuous improvement across the service desk.

T-Rex Overview

Established in 1999, T-Rex Solutions, LLC is a proven mid-tier business providing data-centric mission services to the Federal government as it increasingly tries to secure and leverage the power of data. We design, integrate, secure, and deploy advanced technical solutions for our customers so they can efficiently fulfill their critical objectives. T-Rex offers both IT and professional services to numerous Federal agencies and is a leader in providing high quality and innovative solutions in the areas of Cloud and Infrastructure Services, Cyber Security, and Big Data Engineering.

T-Rex is constantly seeking qualified people to join our growing team. We have built a broad client base through our devotion to delivering quality products and customer service, and to do that we need quality individuals. But more than that, we at T-Rex are committed to creat