Information System Security Officer; Government

This is a full-time onsite role based in the location(s) posted and is performed from the designated work location five (5) days per week. No relocation is offered. AT&T will not hire any applicants for this position who require employer visa sponsorship now or in the future. 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. The AT&T Integrity, Compliance & Risk Management Team enables the company to bring secure, resilient, and authorization-ready services to the Public Sector market. Government cybersecurity authorizations are essential to offering and sustaining AT&T solutions for Federal Aviation Administration - Enterprise Network Services (FENS) program.

• Lead NIST RMF lifecycle activities, including system categorization, control selection and tailoring, implementation, assessment, authorization, continuous monitoring, and ongoing authorization, using Xacta as the authoritative GRC and authorization-management platform.
• Translate FISMA, FEDRAMP, DoD RMF, CMMC, agency policy, and contractual requirements into actionable security control implementation plans, technical standards, security requirements, and operating procedures.
• Develop and quality-assure authorization packages in Xacta, including system security plans, security assessment reports, control implementation statements, privacy artifacts, contingency plans, risk assessments, and supporting evidence.
• Plan and oversee security control assessments, validate that controls operate as documented, identify implementation deficiencies, analyze root causes, and verify corrective actions and supporting evidence within Xacta.
• Lead POA&M governance using Xacta and Service Now, ensuring vulnerabilities and control deficiencies identified through assessments, audits, penetration testing, and continuous monitoring are prioritized, assigned, tracked, and remediated within risk-based timelines.
• Establish continuous-compliance and monitoring practices using automated control evidence, security configuration baselines, endpoint telemetry, SIEM capabilities, and vulnerability data from Tenable Security Center.
• Analyze and govern vulnerabilities identified through Tenable Security Center, validate findings, assess risk and asset criticality, coordinate remediation through Service Now, and maintain traceability to applicable controls and POA&M in Xacta.
• Perform security architecture and design reviews across identity, network, application, data, cloud, and operational security domains to identify control gaps and recommend risk-reduction measures.
• Assess the security impact of system changes, including new technologies, cloud services, APIs, data exchanges, integrations, boundary modifications, and changes to architecture, operations, or data flows.
• Apply Zero Trust and threat-informed risk principles, including strong identity, least privilege, device assurance, segmentation, continuous verification, policy-based access, and compensating controls.
• Integrate security governance into Service Now configuration, change, release, incident, and problem-management workflows, including security reviews for infrastructure-as-code and automated deployment pipelines, to prevent unauthorized or non-compliant changes.
• Communicate security posture and residual risk to system owners, authorizing officials, governance bodies, and executive stakeholders using risk indicators, compliance trends, vulnerability metrics, POA&M status, mitigation options, and decision-ready information derived from Xacta, Tenable Security Center, and Service Now.

• Required Clearance:
  Public Trust (#public trust) (#clearable)
• Required Qualifications:
  
  Bachelor's degree Must have an active CISSP
• Desired
  
  Qualifications:
  
  CSM, Sec+ Advanced proficiency with Xacta 360 or comparable governance, risk, and compliance platforms. Hands-on experience with Tenable Security Center and enterprise vulnerability management practices. Working knowledge of the Service Now ecosystem, including GRC and vulnerability mgmt. Strong expertise in identity and access management. Experience with FEDRAMP and CMMC Certification Process and the deployment of…