Information Systems Security Engineer

VT Group (VTG); Chantilly (VA); On-site; USD 90,000 - 120,000; Full time

Job summary

A leading defense technology company in Virginia is seeking a highly skilled Information Systems Security Engineer (ISSE). The role focuses on designing, implementing, and maintaining security controls across enterprise systems and networks, ensuring compliance with various security requirements. Candidates should have at least 5 years of experience in information security, a relevant bachelor's degree, and an active TS/SCI clearance. This role supports mission-critical operations and requires collaboration with various teams.

Qualifications

• Active TS/SCI with Polygraph required.
• 5+ years of experience in information security, with focus on system security engineering.
• Hands-on experience with RMF and NIST 800-53 controls.

Responsibilities

• Design, implement, and maintain security controls for information systems and networks.
• Support the Risk Management Framework (RMF) lifecycle.
• Conduct security assessments and vulnerability scans.

Skills

Information security

System security engineering

Vulnerability scanning

NIST compliance

Networking principles

Education

Bachelor’s degree in Cybersecurity, IT, 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