> Markdown version of [/jobs/ext/3853519-systems-administrator-senior](https://www.wearedevelopers.com/jobs/ext/3853519-systems-administrator-senior). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Systems Administrator (Senior) - **Company:** CACI International Inc. - **Location:** Reston, VA, United States - **Experience:** Expert - **Salary:** $90,300.0 - $189,600.0 - **Contract:** Permanent contract - **Skills:** Multitier Architecture, Collaborative Software, CompTIA Network+, Information Technology Operations, Knowledge Management, Windows Servers, Network Connections, Network Administration, Software Deployment, Web Services, Computer Network Operations, SC Clearance, Information Technology - **Published:** October 21, 2026 - **Apply:** https://www.techcareers.com/job.asp?id=3457516592&tx=CT3432THT&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54 ## About the Role Bachelor's degree + 8 years of experience in related fields, such as systems administration, infrastructure management, IT operations, desktop support, or network administration; equivalencies considered. Active Secret Clearance Proven experience with IT Service Management (ITSM) tools and methodologies, including Total Ticket Ownership (TTO) and problem management Demonstrated expertise in desktop support, infrastructure operations, application deployment, and network administration Strong knowledge of root cause analysis, change management processes, and incident categorization Excellent leadership abilities with proven experience planning and leading technical operations, functioning as a subject matter expert, and supervising systems administration teams Desired - Prior experience supporting federal agencies, especially the Department of State Professional certifications such as ITIL Expert, Microsoft Certified: Windows Server Hybrid Administrator, CompTIA Network+, or similar technical certifications Experience with collaboration platforms, Government-Furnished Equipment (GFE) management, and multi-domain IT support Knowledge of Ticket Management Systems, knowledge base development, and experience supporting geographically distributed user communities ## Description CACI is seeking a Senior Systems Administrator for the Global Mission Operations Support (GMOS) contract, supporting the Department of State. This role offers a unique opportunity to enhance national security through advanced IT solutions. You will collaborate with experienced professionals in an innovative environment, guiding a high-performing team to deliver excellence. The GMOS contract aims to provide world-class IT support by modernizing and maintaining applications and infrastructure using an integrated IT Service Management approach. Join us to make a meaningful impact on a program of national importance., Coordinate Total Ticket Ownership (TTO) activities across DT/EA/CST by performing and coordinating root cause analysis for all tickets under full management and facilitating root cause analysis efforts across technical teams Provide dedicated desktop support for all DT/EA/CST users, including complex troubleshooting, managing Government-Furnished Equipment (GFE), offering limited support for mobile devices, and contributing to self-help and knowledge management resources Manage infrastructure operations including card printer support for domestic locations, domestic consular office systems administration, and web services administration-infrastructure supporting CA global mission Provide Tier II and Tier III application support including installation/deployment of applications and collaboration platform support across enterprise environments Perform network operations activities ensuring reliable network connectivity and availability for CA enterprise Coordinate root cause analysis for high or critical incidents and recurring medium-priority incidents, creating and tracking Problem Management Investigation tickets to resolution and performing trend analysis Review, recommend, and revise Sets of Classifications for incident categorization and resolution tracking, with Government participation and approval Initiate, document, log, and track change requests related to IT services, systems, and infrastructure in the Ticket Management System, following established approval workflows Lead technical initiatives across desktop, infrastructure, application, and network domains, mentoring junior administrators and ensuring adherence to best practices Function as a technical expert across multiple project assignments, planning and leading major technical assignments while supervising systems administration staff