AT
AT&TSenior Systems Administrator Engineer (Government)
Salary$98k – $220k
LocationChantilly, Virginia
Work moderemote · United States
Typefull-time
SenioritySenior
Experience5+ yrs
Company size10,000+ people
PostedSep 25, 2026 · 2w ago
Verified live1d ago
At a glanceSummarised by Seekless from the posting.
Bachelor's degree and minimum 5 years of relevant experience in Security operations of systems supporting: Virtualization, Windows and Linux Computing solution engineering and architecture solutions
Experience with on-premise, cloud and hybrid-cloud based deployments
Active federal security clearance
Strong written and verbal communication skills
Demonstrated leader with team-oriented interpersonal skills; ability to effectively interface with a broad range of people and roles
Top Secret/SCI with polygraph
Active Cleared Individual clearance supporting the overall business up to TS/SCI with polygraph
CISSP, virtual computing certifications, (DoDD 8570/ DoDD 8140)
Experience with ITSM and/or ServiceNow
Comparable VMware certifications, RHCE, MS Certifications, Security Certifications IAT/IAM levels 1-3
Working knowledge of common operating systems (Windows, Linux, etc.) and basic endpoint security principles
Extensive experience in security operations and systems listed in the posting
US citizenship is required
This position requires office presence a minimum of 5 days per week and is only located in the location(s) posted. No relocation is offered
Skills
Linux
Red Hat
CentOS
Ubuntu
VMware
KVM
QEMU
Hyper-V
Windows
Trellix
SentinelOne
Nessus
Splunk
ServiceNow
ITSM
Benefits
Medical dental vision
401(k)
Tuition reimbursement
Paid time off
Paid holidays
Paid parental leave
Paid caregiver leave
Disability benefits
Life insurance
Employee assistance programs
Employee discounts
About the company
AT&T Global Public Sector is a trusted provider of secure, IP enabled, cloud-based, network solutions and professional services to the Federal Government. We are dedicated to recruiting, developing and empowering a diverse, high-performing workforce that is passionate about what they do, committed to our shared values and dedicated to our customers’ mission.
AT&T maintains active contracts and relationships with U.S. Government entities that require secure communications and systems. The operational need to add members to our support staff will continue to enable robust solutions in the IT Service and Support framework. The position supports both the active contracts as well as new contract support requests in facilitation of business capture, operations, and new technology insertion. Close relationship building with the customers ensures operational readiness and compliance.
About the role
This hands-on role is ideal for an experienced IT and security professional who will support networking, physical and virtual computing infrastructure, threat detection tools, system monitoring, incident response, and secure technology integration. In this multifaceted position, you will manage systems administration, security operations, compliance activities, and user administration in coordination with ISSOs and ISSMs. Responsibilities include system integration, configuration, deployment, remediation, and ongoing operations. This position is onsite 5 days per week at the posted location(s) only. No relocation assistance is provided.
Description of Job Duties/Responsibilities:
•
This position requires office presence a minimum of 5 days per week and is only located in the location(s) posted. No relocation is offered.
•
Administer and maintain Linux-based operating systems and virtualization platforms, such as Red Hat, CentOS, Ubuntu, VMware, KVM, QEMU/KVM, and Hyper-V.
•
Support Windows server and workstation environments, including standalone systems and enterprise-wide deployments.
•
Provide multi-platform support for OEM appliances and VMware-based Windows and Linux virtual appliances.
•
Mentor junior and mid-level team members on installation procedures, operational best practices, and security-focused administration.
•
Install, configure, operate, and maintain security and analysis tools such as Trellix, SentinelOne, Nessus, Splunk.
•
Perform system patching, vulnerability remediation, and hardening activities for systems and networks.
•
Deliver Tier 1 through Tier 3 technical support and collaborate with Tier 2 support teams as needed
•
Produce and maintain operational and technical documentation, including OPS policies/instructions, CONOPS, SECOPS, and system build documents.
•
Assist with the implementation, integration, and rollout of new IT solutions and technologies.
•
Provide technical support for security compliance efforts and system accreditation processes.
Requirements
Required Clearance: Top Secret/SCI with polygraph. (#ts/sci) (#polygraph)
Required Qualifications:
•
Bachelor’s degree and minimum 5 years of relevant experience in Security operations of systems supporting: Virtualization, Windows and Linux Computing solution engineering and architecture solutions
•
Experience with on-premise, cloud and hybrid-cloud based deployments.
•
US citizenship is required.
•
Active federal security clearance.
•
Strong written and verbal communication skills.
•
Demonstrated leader with team-oriented interpersonal skills; ability to effectively interface with a broad range of people and roles.
Desired Qualifications:
•
Active Cleared Individual clearance supporting the overall business up to TS/SCI with polygraph.
•
CISSP, virtual computing certifications, (DoDD 8570/ DoDD 8140).
•
Experience with ITSM and/or ServiceNow.
•
Comparable VMware certifications, RHCE, MS Certifications, Security Certifications IAT/IAM levels 1-3.
•
Working knowledge of common operating systems (Windows, Linux, etc.) and basic endpoint security principles.
•
Extensive experience in security operations and systems listed in the posting.
Ready to join our team? Apply today!
Benefits
Our Senior Security Engineer (Government) earns between $98,100 - $220,000 yearly. Not to mention all the other amazing rewards that working at AT&T offers. Individual starting salary within this range may depend on geography, experience, expertise, and education/training.
Joining our team comes with amazing perks and benefits:
Medical/Dental/Vision coverage
401(k) plan
Tuition reimbursement program
Paid Time Off and Holidays (based on date of hire, at least 23 days of vacation each year and 9 company-designated holidays) *Pro-rated when working less than 40 hrs/wk.
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
Weekly Hours:
40
Time Type:
Regular
Location:
Chantilly, Virginia
Legal
AT&T and its subsidiaries are committed to equal employment opportunity. All hiring, promotion, and other employment decisions remain merit-based and free from discrimination on the basis of race, color, religion, religious creed, national origin, ancestry, age, sex, sexual orientation, gender, gender identity, gender expression, physical disability, mental disability, pregnancy, medical condition, genetic information, marital status, citizenship status, military status, veteran status, or any other characteristic protected by federal, state, or local laws. In addition, AT&T will provide reasonable accommodations to qualified individuals with disabilities. AT&T is a fair chance employer and does not initiate a background check until an offer is made. Click here to learn more or request an application accommodation here.