Information Systems Security Engineer

VT Group (VTG); Chantilly (VA); On-site; USD 120,000 - 180,000; Full time

Job summary

VT Group (VTG) is seeking an Information Systems Security Engineer (ISSE) to design, implement, and maintain security controls across enterprise systems and networks. This role ensures systems comply with security requirements while supporting mission-critical operations.

The ISSE will work with system owners, engineers, and cybersecurity teams to integrate security throughout the system lifecycle, including RMF lifecycle activities, risk analyses, and security documentation such as SSP and

Qualifications

• Experience supporting RMF lifecycle and NIST 800-53 controls.
• Experience developing and maintaining A&A documentation (SSP/POA&M/ATO).
• Knowledge of Windows and Linux, and network security principles.

Responsibilities

• Design, implement, and maintain security controls for information systems and networks.
• Support RMF lifecycle activities: categorization, control selection, implementation, assessment, and authorization.
• Conduct security assessments, vulnerability scans, and risk analyses.
• Develop and maintain SSP, POA&M, SAR, and related security documentation.
• Ensure compliance with NIST RMF and organizational security policies.
• Collaborate with ISSOs, system administrators, and developers to remediate vulnerabilities.
• Support continuous monitoring and incident response activities.
• Implement and manage security tools (SIEM, IDS/IPS, endpoint protection).
• Provide guidance on secure system architecture and design.
• Stay current on threats, vulnerabilities, and security technologies.

Skills

RMF lifecycle

Vulnerability assessments

Incident response

Security architecture

Encryption/Access control

Education

Bachelor’s degree in Cybersecurity or related field

Tools

ACAS

Nessus

SIEM

Job description

Overview

VTG is seeking a highly skilled Information Systems Security Engineer (ISSE) to design, implement, and maintain security controls across enterprise systems and networks. This role ensures systems are compliant with security requirements while supporting mission-critical operations. The ISSE will work closely with system owners, engineers, and cybersecurity teams to integrate security throughout the system lifecycle.

What will you do?

• Design, implement, and maintain security controls for information systems and networks
• Support the Risk Management Framework (RMF) lifecycle, including system categorization, control selection, implementation, assessment, and authorization
• Conduct security assessments, vulnerability scans, and risk analysis
• Develop and maintain system security documentation (SSP, POA&M, SAR, etc.)
• Ensure systems comply with NIST, RMF, and organizational security policies
• Collaborate with ISSOs, system administrators, and developers to remediate vulnerabilities
• Support continuous monitoring and incident response activities
• Implement and manage security tools (SIEM, IDS/IPS, endpoint protection, etc.)
• Provide technical guidance on secure system architecture and design
• Stay current on emerging threats, vulnerabilities, and security technologies

Do you have what it takes?

• Active TS/SCI with Polygraph required.
• Bachelor’s degree in Cybersecurity, Information Technology, Computer Science, or related field (or equivalent experience)
• 5+ years of experience in information security, with focus on system security engineering
• Hands-on experience with RMF and NIST 800-53 controls
• Experience developing and maintaining A&A documentation (SSP, POA&M, ATO packages)
• Knowledge of operating systems (Windows, Linux) and network security principles
• Experience with vulnerability scanning tools (ACAS, Nessus, or similar)
• Familiarity with security tools such as SIEM, firewalls, and endpoint protection
• Understanding of encryption, identity management, and access control mechanisms