Senior Systems Administrator – Government

AT&T

. Maintain and develop system documentation, including product guides/manuals, SOPs, work logs, and the Helpdesk ticket system .

Posted 11/10/2026full-timeColumbia • Maryland • United StatesSenior💰 $89,200 - $192,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in system administration and support across Windows and Linux environments, with a strong focus on troubleshooting, documentation, and helpdesk operations. Proficient in managing VMware infrastructure and ensuring security compliance in integrated IT environments.

Highest-signal resume keywords

Active TS/SCI With PolySystem Administration SupportRed Hat LinuxVMware InfrastructureSecurity+ Certification

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

TroubleshootingEnd-To-End Infrastructure ResolutionConfiguration ChangesPatchingIncident ResolutionDocumentationMonitoringTestingOperating SystemsVirtualization Platforms

Soft Skills

Cross-Functional CoordinationProblem Solving

Tools & Technologies

Windows 10Linux ServerEnterprise Network DevicesHelpdesk Ticket System

Certifications & Qualifications

Security+Bachelor’s Degree In Related Field

Industry Keywords

SOPsIT-Related QuestionsTrouble Ticket ResolutionIntegrated IT EnvironmentsTrusted Linux

Tech Stack

Tools & technologies

LinuxTypeScriptVMware

About the role

Key responsibilities & impact

Maintain and develop system documentation, including product guides/manuals, SOPs, work logs, and the Helpdesk ticket system
Provide system administration support
Maintain and support existing software, including problem report/trouble ticket resolution, and hardware
Provide helpdesk support for collecting, controlling, disseminating, documenting, and resolving IT-related questions and problems
Provide cross-functional systems and network administration support across Windows and Linux server environments, VMware infrastructure, and enterprise network devices
Troubleshoot and resolve end-to-end infrastructure issues spanning servers, operating systems, virtualization platforms, network connectivity, and security configurations
Perform hands-on operations and maintenance, including monitoring, configuration changes, patching, upgrades, testing, incident resolution, documentation, and sustainment of integrated IT environments
Coordinate across technical functional areas as needed

Requirements

What you’ll need

Active TS/SCI with Poly
Bachelor’s degree in related field
Eight years of relevant experience
Understanding of Red Hat Linux, Trusted Linux, Windows 10, and VMware
Security+ or relevant certification (desired)

Benefits

Comp & perks

Medical/Dental/Vision coverage
401(k) plan
Tuition reimbursement program
Paid Time Off and Holidays (at least 23 days of vacation each year and 9 company-designated holidays)
Paid Parental Leave
Paid Caregiver Leave
Additional sick leave beyond what state and local law require may be available but is unprotected
Adoption Reimbursement
Disability Benefits (short term and long term)
Life and Accidental Death Insurance
Supplemental benefit programs: critical illness/accident hospital indemnity/group legal
Employee Assistance Programs (EAP)
Extensive employee wellness programs
Employee discounts up to 50% off on eligible AT&T mobility plans and accessories, AT&T internet (and fiber where available) and AT&T wireline phone