Senior Cyber Security Analyst

General information

Requisition # R67203 Locations USA-VA-Virginia Beach Posting Date 04/17/2026 Security Clearance Required Secret Remote Type Onsite Time Type Full time

Description & Requirements

Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we’ve been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now—protect and innovate with MANTECH!

MANTECH seeks a motivated, career and customer-oriented Senior Cyber Security Analyst to join our team in Virginia Beach, VA. This is an on-site position.

As a Senior Cyber Security Analyst, you will provide direct support to the Advance Electronic Systems (AES) team and its customers in support of Risk Management Framework (RMF) activities. This role focuses on security control implementation, assessment, continuous monitoring, and RMF compliance, with primary emphasis on Linux systems and supporting knowledge of Windows environments. You will serve as the point of contact for all cybersecurity-related matters, including security control implementation, documentation, and compliance activities

Responsibilities include, but are not limited to:

• Prepare for Risk Management Framework (RMF) execution and perform system categorization by conducting comprehensive mission analysis, defining the authorization boundary with detailed network diagrams, hardware/software inventories, and data flow documentation. Determine mission criticality and apply relevant overlays to establish the appropriate security control baseline per NIST SP 800-53 Rev 5 and DoD/Navy policy.

• Select, tailor, implement, and assess security controls using DISA STIGs (with emphasis on Linux platforms), SRGs, SCAP, ACAS/Nessus vulnerability scans, and NIST SP 800-53A Assessment Procedures. Perform hands-on configuration, hardening, log analysis, and remediation on Linux systems, while applying equivalent controls and STIGs to Windows endpoints. Execute testing, validate configurations and access controls, document implementation status, test results, and evidence in eMASS, and manage POA&M entries with complete risk analysis.

• Support system authorization by maintaining a complete and accurate RMF package in eMASS, including the SSP, POA&M, and supporting documentation. Coordinate workflow actions for Authorizing Official decision-making.

• Conduct continuous monitoring by implementing the System Level Continuous Monitoring (SLCM) Strategy, with focus on Linux system logs and security events alongside Windows endpoint monitoring.

• Conduct Annual Security Reviews (ASRs) and update the System Security Plan (SSP) and POA&M to reflect changes in risk posture.

• Provide guidance on RMF compliance, risk management, and security strateg