Description Looking for an opportunity to make an impact?At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainable. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business.
If this sounds like a mission you want to be a part of, keep reading!Leidos is seeking a Senior System Administrator to support a large enterprise IT contract for the DOD. The Administrator will provide operations support to customers across multiple geographic locations. They will provide operations and maintenance support to existing virtual desktop environments across multiple enclaves and assist with the implementation of new solutions. The administrator will help drive adoption of trusted thin-client platforms and virtual desktops across a diverse user base by focusing on improving the reliability, functionality, and user experience of the systems. This individual will work in a team environment to ensure mission needs are met for internal and external customers.
Primary Tasks:- Individuals in this role will be required to perform remote administration of servers located in offsite data centers.
- Provide Tier 2 and Tier 3 operations support and be able to rapidly distinguish isolated user problems vs service outages for Citrix technologies to include Citrix XenDesktop, Citrix XenApp, Citrix NetScaler, and Citrix StoreFront in addition to Microsoft M365 Azure Virtual Desktop (AVD).
- Monitor infrastructure and identify system anomalies before they impact customers to include storage availability/capacity, network connectivity, database health, and other daily health checks as required.
- Work closely with Engineering staff to plan out future modernization efforts to meet customer and administrator requirements.
- Collaborate to perform network latency analysis to address slow connections and user experience issues with alacrity.
- Implement version and architectural changes to existing, approved, systems to maintain operability and security of the environment
- Implement major system upgrades as designed and approved
- Coordinate with other Tier 2 and Tier 3 teams for testing and deployment of Group Policy modifications
- Perform periodic backup and restoration of servers
- Monitor desktop capacity to size the environment based on typical usage trends
- Monitor License and Certificate status on the systems and coordinate the renewal and installation as needed.
- Coordinate with customers and stakeholders to collect data, conduct analysis, develop, and implement solutions associated with incident tickets and requirements.
- Establish comprehensive availability and capacity management solution using lessons learned
- Develop solutions to technical issues.
- Provide follow-up reports (technical findings, feedback, resolution steps taken) for root cause analysis, engineering technical assessment and process improvement initiatives.
- Periodically review, update, and generate Standard Operating Procedures (SOPs) for systems and services under your control.
- Update operations and monitoring documentation for 24/7/365 IT Operations Center (ITOC) personnel.
- Respond to after-hours outages when deemed mission critical by ITOC government rep.
- Conduct routine maintenance following customers prescribed maintenance windows which may include evening and/or weekend maintenance to minimize impact on customers and their mission.
- Provide mentorship and training for junior team members.
Basic Qualifications- Experience with interacting with customers to handle service inquiries and problems.
- Experience working as a Tier 2 and Tier 3 system administrator: familiar with using desktop software applications such as web browsing and client software, and IT Service Management software such as ServiceNow.
- Knowledge of IC IT standards and best practices.
- Extensive knowledge of Citrix technologies to include, XenDesktop, XenApp, NetScaler, and StoreFront.
- Experience managing Microsoft M365 Azure Virtual Desktops (AVD).
- Extensive experience with patch and upgrade methodology for front-end and back-end systems based on Citrix technology.
- Experience with rapid testing, validation, and deployment of new baseline images
- Extensive experience with conducting incident and trend analysis via log review, performance baselining/review, and other incident/problem management techniques to develop solutions to ongoing issues impacting customer experience
- Experience with Scripting/Automation
- Experience troubleshooting issues in a growing environment.
- Time management skills.
- Strong oral and written communications skills.
- Track record of working effectively within a team and support to peers toward improved processes and results.
- Experience with support ticket management systems.
- Experience mentoring others and/or supervising others.
Certifications- Candidate must, at a minimum, meet DoDM 8140.03 (previously DoD 8570) - IT System Admin Intermediate certification requirements (Cloud+, GICSP, SSCP, Security+ CE, GSEC, or higher).
Education- Candidate must have a Bachelor's degree with 8 years of relevant experience, Master's degree with 6 years, Associate's with 10 years, or High School Diploma with 12 years.
- Clearance
- Due to the nature of the government contracts we support, US Citizenship is required.
- TS/SCI with Poly required for Position or TS/SCI and willingness to obtain and maintain a polygraph.
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.
Original Posting:October 19, 2026
For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Pay Range:Pay Range $92,300.00 - $166,850.00
The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
About LeidosLeidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.
Pay and BenefitsPay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.
Securing Your DataBeware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.
Commitment to Non-DiscriminationAll qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.
