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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Tier 3 Service Desk Administrator - **Company:** Gridiron IT Solutions LLC - **Location:** Washington, DC, United States (Remote available) - **Experience:** Experienced - **Salary:** $120,000.0 - $155,000.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, User Authentication, Microsoft Azure, BitLocker Drive Encryption, Microsoft Outlook, Configuration Management, System Configuration, Data Migration, Dynamic Host Configuration Protocol, Domain Name System (DNS), Virtual Private Networks (VPN), System Center Configuration Manager, Windows PowerShell, Azure Active Directory, Software Deployment, TCP/IP, User Environment Management, EndPointSecurity, Wi-Fi Technology, Enterprise Software Applications, Peripherals, Microsoft InTune, Microsoft Onedrive, Deployment Automation, 3-tier Architectures - **Published:** October 6, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9220030/tier-3-service-desk-administrator ## About the Role The ideal candidate has strong troubleshooting skills across Windows endpoints, enterprise applications, identity, networking, device management, and endpoint security, along with the ability to diagnose and resolve issues that cannot be addressed through standard Tier 1 or Tier 2 support processes., High school diploma or equivalent and 2+ years of prior relevant experience. 5+ years of experience in enterprise IT support, desktop engineering, endpoint management, or service desk operations. Demonstrated experience providing Tier 3 or advanced technical support in a large enterprise environment. Strong troubleshooting experience with Windows 10/11 endpoints and Microsoft 365. Hands-on experience with Microsoft Intune, MECM/SCCM, Autopilot, Group Policy, and Active Directory/Entra ID. Experience supporting enterprise endpoint migrations, hardware refreshes, operating system upgrades, or large-scale device deployments. Strong understanding of DNS, DHCP, TCP/IP, VPN, Wi-Fi, and authentication fundamentals. Experience troubleshooting endpoint applications, drivers, peripherals, certificates, profiles, and system configuration. Ability to analyze logs and system information to isolate complex technical issues. Strong incident management, problem management, and root-cause analysis skills. Excellent written and verbal communication skills. Ability to work independently while collaborating effectively across technical teams. Must maintain DoD 8570 compliance. Desired Qualifications Experience supporting large-scale Windows 11 migrations or enterprise device modernization programs. Experience with Microsoft Autopilot and modern endpoint management. Experience with PowerShell scripting and endpoint automation. Familiarity with Microsoft Entra ID, Conditional Access, Defender for Endpoint, BitLocker, and endpoint compliance. ITIL certification or experience working within an ITIL-based service management environment. Microsoft certifications related to endpoint administration, Microsoft 365, or Azure. Experience working in a project-based migration or transformation environment. ## Description We are seeking an experienced Tier 3 Service Desk Engineer to provide advanced technical support and operational expertise for enterprise endpoint migration initiatives. This position serves as a senior escalation point for complex endpoint issues and partners closely with Endpoint Engineering, Infrastructure, Security, and Service Desk teams to support successful migration activities and a stable end-user experience., Provide Tier 3 technical support for endpoint migration, deployment, provisioning, and post-migration stabilization issues. Troubleshoot complex Windows endpoint issues involving operating systems, drivers, applications, profiles, authentication, networking, peripherals, and device configuration. Support device replacement, operating system upgrades, hardware refreshes, profile and data migration, application deployment, and user cutover activities. Investigate and resolve migration failures, deployment errors, application compatibility issues, configuration problems, and recurring endpoint incidents. Serve as the escalation point for Tier 1 and Tier 2 Service Desk teams, providing technical guidance and knowledge transfer. Partner with Endpoint Engineering and other technical teams to identify root causes and develop sustainable remediation strategies. Support endpoint management platforms such as Microsoft Intune, Microsoft Configuration Manager (SCCM/MECM), Autopilot, or comparable enterprise technologies. Troubleshoot Microsoft 365, Teams, Outlook, OneDrive, authentication, VPN, printing, and other business-critical endpoint services. Assist with endpoint security controls, including device compliance, encryption, endpoint protection, and security policy troubleshooting. Develop and maintain technical documentation, knowledge articles, troubleshooting procedures, and migration runbooks. Analyze incident and migration data to identify trends, recurring failures, and opportunities for automation or process improvement. Participate in migration waves, cutovers, hypercare, and scheduled deployment activities, including occasional after-hours support when required. Coordinate with vendors and third-party support organizations when escalation outside the internal environment is necessary. Ensure incidents and service requests are accurately documented and resolved in accordance with established service management processes.