Senior Security Engineer (Government)

At&t
Chantilly, Virginia 20151 United States  View Map
Posted: Jun 03, 2026
  • Full Time
  • Federal Government
  • Information Technology and Communication Services
  • Summary

    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 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.

    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.
  • ABOUT THE COMPANY

    • Government Careers
    • Government Careers

    Government jobs offer stability, competitive benefits, and the chance to make a meaningful impact on your community and country.

    Whether you’re starting your career or seeking new opportunities, these roles provide pathways for growth, security, and service.

    Explore positions across a wide range of fields and take the first step toward a rewarding future in public service.

    Show more

MORE JOBS

  • Sleep Medicine Physician

    • Phoenix, Arizona
    • myMDcareers
    • Jun 03, 2026
    • Full Time
    • Federal Government
    • Other
  • Physician / Family Practice / New York / Permanent / Primary Care Physicianneeded in South Bronx, NY Job

    • Not Specified, New York
    • HealthPlus Staffing
    • Jun 03, 2026
    • Full Time
    • Federal Government
    • Other
  • Had a Healthy Pregnancy? Help Create a Family While SupportingYourOwn($60k-$100k)

    • Newport, Vermont
    • Royal Surrogacy
    • Jun 03, 2026
    • Full Time
    • Federal Government
    • Other
  • Physician / Neonatology / Florida / Locum tenens / Locums Neonatology Job inFlorida Job

    • Caryville, Florida
    • Hayman Daugherty Associates, Inc
    • Jun 03, 2026
    • Full Time
    • Federal Government
    • Other
  • Registered Nurse, RN - Puyallup area

    • PUYALLUP, Washington
    • Optum
    • Jun 03, 2026
    • Full Time
    • Federal Government
    • Other
  • Nocturnist Physician

    • Suffolk, Virginia
    • Source Medical, LLC.
    • Jun 03, 2026
    • Full Time
    • Federal Government
    • Other
Show More
Apply Now Please mention you found this employment opportunity on the CareersInGovernment.com Job Board.
Please mention you found this employment opportunity on the CareersInGovernment.com Job Board.