Information Systems Security Engineer (ISSE)

VT Group (VTG); Chantilly (VA); On-site; USD 100,000 - 130,000; Full time

Job summary

VT Group (VTG) is seeking a skilled Information Systems Security Engineer (ISSE) in Chantilly, Virginia. The role involves designing and managing security controls across systems, ensuring compliance with NIST and RMF norms. Candidates must possess significant information security experience (5+ years) and maintain an active TS/SCI clearance with Polygraph. The position also requires hands-on experience with documentation, vulnerability scanning tools, and a solid understanding of security protocols across various operating systems.

Qualifications

• 5+ years of experience in information security.
• Hands-on experience with RMF and NIST 800-53 controls.
• Experience developing and maintaining A&A documentation.

Responsibilities

• Design, implement, and maintain security controls for information systems.
• Conduct security assessments and vulnerability scans.
• Ensure compliance with NIST and organizational security policies.

Skills

Active TS/SCI with Polygraph

System security engineering

Experience with RMF and NIST 800-53 controls

Vulnerability scanning tools

Knowledge of Windows and Linux

Education

Bachelor’s degree in Cybersecurity or related field

Tools

ACAS

Nessus

SIEM

Job description

Overview

We are 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