Information Systems Security Engineer Level 3 (Government)
Confirmed on the employer's own hiring board on Oct 15, 2026. First seen by Alion on Oct 5, 2026. AT&T scores A on the Alion truth index.
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.
RIS I is the delivery of regional IT services to the end user. We offer support of end user devices including desktop, workplace peripherals, and voice and video devices. We support local and campus area networks, including wireless and cable plant.
AT&T has an opening for Information Systems Security Engineer to support the team by performing or reviewing technical security assessments of computing environments to identify points of vulnerability, non-compliance with established Information Assurance (AI) standards and regulations, and recommend mitigation strategies.
This is a full-time onsite role based in the location(s) posted and is performed from the designated work location five days per week. No relocation is offered.
Description of Job Duties/Responsibilities:
- Provide expert guidance and work product evaluation to one or more security engineers that support engineering teams for the design, development, implementation, evaluation, and integration of secure networking, computing, and enclave environments.
- Advocate and recommend system-level solutions for the secure development and maintenance of systems.
- Monitor and suggest improvement to IA policy; Interact with customers, IT staff, and high-level corporate officers to define and achieve required IA objectives.
- Ensure that the architecture and design of information systems are functional and secure, including program-of-record systems, new and proposed systems, and special purpose environments with platform IT interconnectivity.
- Prevention and early detection and resolution of risks to high value assets.
- Architect, design, implement, support, and evaluate security-focused tools and services.
- Providing software vulnerability remediation advice to software developers and software development teams.
- Implementing security vulnerability testing tools to provide continuous monitoring and patch verification.
- Test and evaluate products in a lab environment.
- Review certification and accreditation (C&A) documentation, providing feedback on completeness and compliance of its content.
- Knowledge of 800-53 controls, testing information systems for compliance of the controls, and the creation of test cases.
- Knowledge of incident response and the creation, execution, and reporting of such activities.
- Knowledge of Firewalls, IDS/IPS, intrusion detection, VLANS, routing and other network security technologies.
- Knowledge of virtualization technologies including virtual firewalls, networking and segmentation.
- Knowledge of SIEM technologies such as Splunk and creation of security event related dashboards.
- Knowledge of Malware identification, containment, and eradication.
- Knowledge of access control systems, PKI, multi-factor authentication, and entitlements management.
- Proficient in Microsoft Windows and Linux operating systems.
- Provide input into the development of security policies and procedures.
- Evaluate and recommend new and emerging security products and technologies.
- Participate in projects that develop new intellectual property.
- Evangelize security within the organization and be an advocate for customer trust.
- Excellent written and verbal communication skills.
- Excellent leadership skills and teamwork skills.
Required Clearance: TS/SCI with polygraph. (#ts/sci) (#polygraph)
Required Qualifications:
Twenty (20) years of experience as an ISSE on programs and contracts of similar scope, type, and complexity are required. Bachelor’s degree in Computer Science, Information Assurance, Information Security System Engineering, or related discipline from an accredited college or university is required. A Master’s degree in Computer Science, Information Assurance, Information Security System Engineering, or related discipline may be substituted for two (2) years of experience, reducing the requirement to eighteen (18) years of experience. Four (4) years of additional ISSE experience may be substituted for a Bachelor’s degree.
- DoD 8570 compliance with IASAE Level 2 is required.
Ready to join our team? Apply today!
Our Information Systems Security Engineer Level 3 (Government)
earns $118,700 - $243,300
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:
40Time Type:
RegularLocation:
Columbia, MarylandAT&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.