Principal Cybersecurity Engineer

Sabre Systems seeking a Principal Cybersecurity Engineer to provide senior level Information System Security Engineering (ISSE) support for a federal cybersecurity program operating under the Risk Management Framework (RMF). This role requires advanced engineering expertise and includes advisory duties supporting federal information systems, operational technology (OT), and hybrid cyber-physical platforms. The Principal Cybersecurity Engineer will guide cybersecurity architecture, compliance, threat analysis, and continuous monitoring while producing high quality documentation and executive level deliverables.

• Location:
  
  Hybrid - National Capital Region
• Hybrid work with onsite presence required for classified work
• Occasional CONUS travel

• Serve as the lead ISSE for assigned information systems, OT environments, and hybrid cyberphysical platforms.
• Lead or support the full RMF lifecycle-from categorization and control selection through assessment, authorization, continuous monitoring, and decommissioning.
• Develop, update, and maintain RMF documentation in eMASS, including SSPs, SCTMs, POA&Ms, SARs, contingency/incident response plans, risk analyses, inventories, diagrams, and data flows.
• Conduct Security Readiness Reviews; analyze ACAS/Nessus data; validate remediation and coordinate DISA ticket actions.
• Support ongoing compliance with DoD, DHS, USCG, and DISA STIG requirements; contribute to cATO efforts, automated evidence gathering, and dashboard integration.
• Perform Security Impact Assessments and participate in engineering reviews, change control boards, acquisition milestones, and technical working groups.
• Integrate Zero Trust principles, RMF control requirements, and OT/ICS security considerations into system engineering and architecture.
• Evaluate cyber threats, adversary TTPs, OT/ICS vulnerabilities, and supply chain risks; recommend mitigation strategies and system hardening approaches.
• Track compliance with authoritative orders (OPORDs, TASKORDs, FRAGOs, ALCOASTs, TCTOs).
• Produce cybersecurity readiness updates, briefings, metrics, and risk memorandums; respond to Government data calls as needed.
• Provide mentorship and technical leadership to junior cybersecurity team members and provide recommendations to improve processes and contract operations.

• Bachelor's degree in Computer Science, Cybersecurity, Information Technology, Engineering, or related technical field.
• Must have nine (9) years of progressive experience in cybersecurity engineering, ISSE, RMF, or related technical domains.
• Must hold one of the following active certifications: CISSP, CISSPISSEP, CISSPISSAP, CompTIA SecurityX (CASP+), CSSLP, CCSP, or CompTIA Cloud+.
• Demonstrated experience executing the RMF lifecycle, including control implementation, assessment, and continuous monitoring.
• Strong understanding of cybersecurity engineering, risk management, networking, vulnerabilities, laws and regulations, and secure system design.
• Excellent communication skills with demonstrated experience briefing senior Government stakeholders.
• Must have an active DoD Secret Clearance or higher. Must be a U.S. Citizen

• Prior cybersecurity support experience with USCG, DHS, or DoD customers.
• Experience with tools such as eMASS, ACAS/Nessus, HBSS, Tanium, Elastic SIEM, Splunk, Service Now, and Burp Suite.
• Experience with OT/ICS/SCADA security or platform systems (shipboard, aviation, industrial control systems).
• Familiarity with DHS 4300A, COMDTINST cybersecurity policy, DoDAF artifacts, ITIL/DESMF processes, and Dev Sec Ops  pipelines.

At Sabre Systems, LLC, compensation is based on factors such as…