This position requires office presence of a minimum of 5 days per week and is only located in the location(s) posted. No relocation is offered. 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. Our Defense Team supports the DoD Cloud-Based Internet Isolation (CBII) capability delivering secure internet access to a global DoD user base. AT&T has an opening for an Information Systems Security Manager to support the Defense Information Systems Agency (DISA) in providing IT services and connectivity in a Department of War (Do. W) environment. Job Duties/ Responsibilities:Support the Program Manager in execution of contractual compliance. Develop and maintain Assessment & Authorization (A&A) artifacts, including Authority to Operate (ATO) packages (Interim AT - Os, continuous AT - Os)Oversee adherence to NIST SP 800-53 controls and DoD Cloud Security Requirements Guide (SRG); ensure compliance with Security Technical Implementation Guides (STIGs) and cloud security policies. Conduct continuous monitoring (log audits, vulnerability scans); track and drive remediation of open Plans of Action & Milestones (POA&M) related to identified security weaknesses. Plan and execute Security Test & Evaluation (ST&E) activities; validate the platform’s security posture through penetration tests, STIG checks, and compliance assessments. Compile and report weekly vulnerability status and compliance posture; coordinate with engineering and ops teams for timely patching and mitigation actions. Participate in Change Control Boards (CCB) to assess security impacts; ensure any data breaches or incidents are reported and lead follow-up investigations in line with DoD cybersecurity incident handling requirements. Develop and update the Cyber Threat Security Plan and other security policy documents; implement supply chain risk management measures consistent with program requirements. Support the program’s CMMC Level 2 readiness, coordinating self-assessments or third-party audits; manage evidence collection and closure of any compliance gaps. Required Clearance:Secret (#secret)Required Qualifications:Experience supporting DoD or DISA IT service programs. One or more of the following DODD 8570.01/8140 certifications: CISM, CISSP, CISSP-ISSMP, FITSP-M, GCIA, GCIH, GICSP, GSLC - Experience with continuous monitoring, e. MASS, STIGs, and vulnerability management. Desired Qualifications:Familiarity with FedRAMP requirements and cloud security architecture. Our Information Systems Security Manager's earn between $125,000 -$140,000. 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)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:San Antonio, Texas. 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-109609 Date posted 05/07/2026