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Senior Security Engineer (Government)

Chantilly, Virginia

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Government

Help give our nation powerful possibilities.

Job Description:

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.

Seeking an experienced IT Security Engineerto join our team. This is a hands-on role requiring a seasoned professional with a comprehensive mix of Security / IT background to support our systems including networking, computer/virtual infrastructure operations, threat detection software and systems, threat analysis and action of supported systems, and new technology integration with built in security engineering included. The team also handles day-to-day security compliance and user administration. The successful candidate will become a viable member leading in the integration, configuration, deployment, security remediation, and operations. 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.

Description of Job Duties/Responsibilities:

  • Expertise in Linux-based operating systems: Red Hat, CentOS, VMware, KVM, QEMU KVM.
  • Windows operating system environment support (Servers/Workstations – standalone and Full enterprise deployments).
  • Multi-platform support of OEM appliances, Windows and Linux VMware based appliances (End user/Virtual Infrastructure).
  • Mentoring junior and mid-level staff in best practices for installation and operations of security products/practices.
  • Ability to install and operate Trellix, SentinalOne, Splunk and other related security and analysis systems.
  • Patching and remediation of monitored systems and networks with the team.
  • Tier 3+ service support, interfacing with Tier 2.
  • IT service delivery, assurance, and operations to include be not limited to documentation: OPS, SECOPS, Systems.
  • Assist in developing new shared services (product deployments, customized solutions – Internal/External as needed).
  • Providing technical implementation support for security compliance and system accreditation processes.

Required Clearance: TS/SCI with the ability to obtain/maintain a polygraph. (#ts/sci) (#polygraph)

Required Qualifications:

  • Must be a US Citizen.
  • 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 Certifications key (DoDD 8570/ DoDD 8140).
  • Experience with ITSM and/or ServiceNow.
  • Comparable VMware certifications, RHCE, MS Certifications, Security Certs in general to 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 supported systems named/unnamed within 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 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-89623 Date posted 11/06/2025
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Benefits

Invested in your satisfaction and continued success.

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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

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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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