Information Systems Security Engineer-RMF (ISSE II) (Government)

AT&T•Columbia, MD

1d•Onsite

About The Position

AT&T Global Public Sector is seeking an Information Systems Security Engineer (ISSE) 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 position requires office presence a minimum of 5 days per week and is located in Columbia, Maryland. The role involves serving as the technical security engineer for assigned systems and System Security Plans (SSPs), ensuring full lifecycle RMF compliance, and providing technical input for Authorization to Operate (ATO) packages, risk acceptance decisions, and continuous monitoring efforts. The ISSE will implement and validate security controls from NIST SP 800-53, collaborate with vulnerability scanning teams, support continuous monitoring activities, and coordinate with ISSOs and system administrators to document and remediate vulnerabilities. The role also includes leading or supporting reauthorization efforts, evaluating security-relevant changes, and interfacing with Security Architects and Technology Framework teams to ensure alignment with approved architectures and customer mandates. Testing and evaluating configurations in a lab environment is also part of the duties. The candidate must possess a TS/SCI with polygraph clearance.

Requirements

Fourteen (14) years’ experience as an ISSE on programs and contracts of similar scope, type, and complexity within the Federal Government is required.
Bachelor’s degree in Computer Science, Information Assurance, Information Security System Engineering, or related discipline from an accredited college or university is required.
Four (4) years of additional ISSE experience may be substituted for a bachelor’s degree.
Active DoD 8570 IAT Level II or III certification (e.g., Security+, CASP, CISSP, or equivalent).
Knowledge of servers, virtualization, routers, switches, and firewalls as well as VLANS, routing and network segmentation.
Demonstrated experience authoring and maintaining System Security Plans (SSPs), SCTMs, and POA&Ms.
Solid understanding of continuous monitoring, reauthorization, and configuration management processes.
Hands-on familiarity with Tenable, Splunk, STIG Viewer, and customer security compliance management tools.
Knowledge of Windows, Linux, and network security controls implementation.
Excellent communication and teamwork skills.
Results oriented, high energy, self-motivated.
Required Clearance: TS/SCI with polygraph.

Nice To Haves

Candidate may be required to respond to after-hours requests as required in a 24 x 7 environment.

Responsibilities

Serve as the technical security engineer for assigned systems and System Security Plans (SSPs), ensuring full lifecycle RMF compliance.
Provide technical input for Authorization to Operate (ATO) packages, risk acceptance decisions, and continuous monitoring efforts.
Implement and validate security controls from NIST SP 800-53.
Serve as technical security liaison with technology frameworks to complete system documentation.
Ensure all controls are properly mapped, implemented, and tested within the Security Control Traceability Matrix (SCTM) and respond to Security Assessment Report (SAR).
Collaborate with the vulnerability scanning team (e.g., Tenable operators) to ensure scan compliance, findings are addressed, retested, and reflected accurately in the system’s risk posture.
Support continuous monitoring activities, including vulnerability tracking, control reassessments, and serve as technical security liaison with technology frameworks.
Coordinate with ISSOs and system administrators to document and remediate vulnerabilities, control deficiencies, and Plan of Action & Milestones (POA&M) items.
Lead or support reauthorization efforts, ensuring all system technical artifacts are updated, validated, and submitted on schedule.
Evaluate and document security-relevant changes, assessing configuration updates, patches, or system modifications for RMF impact.
Interface with Security Architect to ensure designs, configurations, and security mitigations align with approved architectures and customer mandates.
Work with Technology Framework teams to complete all system documentation.
Test and evaluate configurations in a lab environment.
Provide security operations support as needed.
Willingness to train junior team members.

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