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Senior Security Engineer (Government)

Chantilly, Virginia

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Government

Help give our nation powerful possibilities.

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.



Job ID R-110817 Date posted 05/28/2026
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Benefits

Invested in your satisfaction and continued success.

We take care of our own here (hint: that could be you). Our benefits and rewards mean we cover some of your biggest needs with some of the coolest offerings. We already think we’re a pretty great place to work. We’re just trying to rack up some bonus points.

Let’s start with the big one: Your work gets rewarded with competitive compensation and benefits. It really does pay to be on our team.

Compensation

Paid Time Off

Our people have class. Literally. We can help you out on approved education costs with our tuition assistance plan.

Tuition
Assistance

Here’s another reason to breathe easy: You and your family get access to excellent medical, dental and vision insurance options.

Insurance Options

Wanna make your friends really jealous? You’ll get discounted access to the latest and greatest AT&T products and services — plus other awesome items, like tickets to live events.

Discounts

You strike us as an over-achiever (don’t worry, it’s a compliment). Our training and development programs are your ticket to expert status in your job.

Training & Development

When the day comes that you get some much needed R&R (not that you’d ever want to leave #LifeAtATT) you’ll know your future is set with the AT&T Retirement Savings Plan (ARSP).

Savings

The Hiring Process

Step 1

Complete a quick application online and check your status often.

Step 2

Virtual or in-person
Interviews

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Step 3

Conditional
Job Offer

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Step 4

Welcome! Onboarding
and Training Begins

Our training and certification programs set you up for success.

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