Senior Systems Administrator Engineer (Government)

Posted Yesterday
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Chantilly, VA, USA
In-Office
98K-220K Annually
Senior level
Internet of Things • Mobile • Retail
The Role
Hands-on senior systems administrator supporting Windows and Linux servers, virtualization, security tooling, incident response, patching, vulnerability remediation, system hardening, documentation, and compliance for government contracts. Requires mentoring, integration of new technologies, and coordination with ISSOs/ISSMs.
Summary Generated by Built In

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.

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.

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!

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

It is the policy of AT&T to provide equal employment opportunity (EEO) to all persons regardless of age, color, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by federal, state or local law. In addition, AT&T will provide reasonable accommodations for qualified individuals with disabilities. AT&T is a fair chance employer and does not initiate a background check until an offer is made.

Skills Required

  • Onsite presence 5 days per week at posted location(s) (no relocation)
  • Bachelor's degree and minimum 5 years relevant experience in security operations, virtualization, Windows and Linux engineering
  • US citizenship
  • Active federal security clearance (Top Secret/SCI with polygraph)
  • Administer and maintain Linux-based OS (Red Hat, CentOS, Ubuntu) and virtualization platforms (VMware, KVM, QEMU, Hyper-V)
  • Support Windows server and workstation environments
  • Install, configure, operate, and maintain security and analysis tools (Trellix, SentinelOne, Nessus, Splunk)
  • Perform system patching, vulnerability remediation, and system/network hardening
  • Deliver Tier 1 through Tier 3 technical support and collaborate with other support teams
  • Produce and maintain operational and technical documentation, OPS policies, CONOPS, SECOPS, and build documents
  • Support security compliance efforts and system accreditation processes
  • Experience with on-premise, cloud, and hybrid-cloud deployments
  • Strong written and verbal communication and demonstrated leadership/team-oriented interpersonal skills
  • Mentor junior and mid-level team members on installation, operations, and security-focused administration
  • Active Cleared Individual supporting up to TS/SCI with polygraph (desired if not already covered)
  • CISSP, virtualization certifications, DoDD 8570/8140, RHCE, VMware, MS certifications, IAT/IAM levels 1-3 (certifications)
  • Experience with ITSM and/or ServiceNow
  • Extensive experience in listed security operations and systems

AT&T Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about AT&T and has not been reviewed or approved by AT&T.

  • Healthcare Strength Health coverage spans medical, dental, vision, and mental health services, plus a personal healthcare team, wellness apps, and supplemental options such as fertility care, cancer support, doula services, and wigs for chemotherapy. These comprehensive offerings are portrayed as supporting a wide range of employee needs.
  • Leave & Time Off Breadth Paid time off includes vacation, holidays, sick days, caregiver time, parental leave, and adoption assistance, with some roles reaching about 23 days of PTO after several years. Community volunteer days and flexible time off options add further support for work-life balance.
  • Wellbeing & Lifestyle Benefits Employees receive sizable service discounts like 50% off most wireless plans and broadband, along with savings on travel, event tickets, and insurance. Additional workplace perks such as hybrid work models and relocation assistance contribute to overall value.

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The Company
HQ: Dallas, TX
150,000 Employees

What We Do

Bring us your biggest career aspirations. Share your boldest dreams. This is a moment to get energized. Through 5G and Fiber, AT&T provides connectivity that leads to smarter homes, safter communities, higher quality health care and more life-changing innovations. With AT&T, Connecting Changes Everything.

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