ISSO Cybersecurity Engineer, Senior

Booz Allen Hamilton•Aberdeen Proving Ground, MD

6d•$99,000 - $225,000•Remote

About The Position

This is your opportunity to own and sustain RMF governance activities for DoD information systems, ensuring authorization artifacts, eMASS records, control implementation evidence, and remediation activities accurately reflect the system’s cybersecurity posture. System and device hardening, security patching and ability to analyze STIG, SCAP, and ACAS findings, POA&Ms, architecture, inherited controls, compensating controls, and technical evidence.

Requirements

5+ years of experience with DoD RMF or cybersecurity
Experience using eMASS to address security controls, create POA&Ms, and upload artifacts such as STIG checklists or ACAS scans
Experience with the administration of Windows, Linux, AWS Cloud and containerization systems, and software configuration
Knowledge of NIST SP 800-37, NIST SP 800-53 Rev. 5, DoDI 8510.01, POA&M management, and DoD authorization practices
Ability to validate STIG and vulnerability findings, false positives, risk acceptances, mitigations, remediation evidence, and closure packages using ACAS and Nessus scans, STIGs, SCAP, SCC, vulnerability results, configuration reviews, system queries, and manual procedures
Ability to analyze system boundaries, data flows, external interfaces, interconnections, inherited controls, and common-control dependencies
TS/SCI clearance
Bachelor's degree in a technical field such as Engineering or Cyber
Security+ Certification

Nice To Haves

Experience with technical writing and evidence-validation skills
Experience with ticket and workflow platforms and disciplined documentation
Knowledge of TCP, IP, ports, protocols, firewalls, segmentation, PKI, encryption, identity and access management, and DoD network security concepts
Knowledge of technical control implementation
Ability to read and design network and system architecture diagrams
Ability to evaluate ICAM controls, including MFA, PKI, CAC authentication, privileged access, account management, separation of duties, and least privilege
Ability to distinguish routine connectivity from connections that alter authorization boundary or risk posture
DoD 8570 or 8140-aligned Certification such as CISSP or CASP+ Certification

Responsibilities

Manage RMF lifecycle activities and authorization-package maintenance.
Maintain SSP, ConMon Plan, IRP, CMP, control narratives, diagrams, inventories, and supporting evidence.
Perform eMASS package administration and quality assurance.
Coordinate monthly POA&M updates, evidence validation, milestone tracking, and closure.
Analyze NIST SP 800-53 Rev. 5 controls and translate requirements into system-specific implementation statements.
Develop Security Impact Assessments for proposed system and configuration changes.
Develop or coordinate ISAs, MOAs, and MOUs as required for system interconnections.
Support T-Req and data-connection reviews and coordinate with ISSM, engineers, and system owners and review T-Req or connection tickets for completeness.
Prepare packages and stakeholders for continuous monitoring and authorization reviews.
Analyze source and destination, ports, protocols, services, data sensitivity, encryption, authentication, boundary protection, and mission need.
Identify required security artifacts, approvals, firewall, network actions, and interconnection documentation.
Coordinate with ISSM, network and security engineer, system owners, and requestors.
Maintain status, metrics, aging reports, and escalation paths.
Identify high-risk or nonstandard connection requests for deeper assessment.