ISSE - TS/SCI Cleared

Job Description

Information System Security Engineer (ISSE)

Location: Pentagon

Clearance Required: Top Secret/SCI

Employment Type: Full-time

Overview

Join our Cybersecurity Team supporting the National Military Command Center (NMCC). We’re seeking a mission-driven Information System Security Engineer (ISSE) to lead and contribute to system security engineering, risk assessments, and security architecture across high-impact federal programs.

The ISSE will provide technical security assessments, identify vulnerabilities, and ensure compliance with federal cybersecurity regulations. This is a hands-on role working alongside engineering teams to integrate cybersecurity into complex IT systems.

Key Responsibilities

Serve as a security engineering representative on system design and engineering teams

Design and implement secure architectures for new and existing network systems

Define security requirements based on NIST and DoD standards

Apply the Risk Management Framework (RMF), NIST SP 800-53, STIGs, and SCAP tools

Document security controls and gather artifacts for RMF and ICD 503 accreditation

Recommend and implement vulnerability mitigation strategies

Validate system security designs and support operational deployment

Maintain POAMs and resolve findings from security scans and assessments

Build, patch, and deploy HBSS (Windows) and ACAS (Linux) servers and applications

Conduct technical security assessments and manage Nessus, Security Center, and ePO

Provide Tier 3 support for cybersecurity tools like ACAS and HBSS/ESS

Lead or support security risk analysis, assessments, certifications, and planning

Required Qualifications

Active Top Secret/SCI clearance

Security+ certification

10+ years of hands-on experience with FISMA and NIST frameworks

Deep understanding of systems engineering, network architecture, and cyber risk

Ability to identify risks across operating systems, protocols, and hardware

Strong verbal and written communication skills

Excellent planning, time management, and independent problem-solving skills

Preferred Qualifications

Experience using eMASS and/or Xacta

Ability to run SCAP scans on Windows and Red Hat Enterprise Linux (RHEL) servers

Knowledge of licensing for HBSS ePO and Tenable Security Center

Deep understanding of information security principles and risk assessment methodologies

Familiarity with DoD cybersecurity compliance and RMF toolsetsCompany Description

Agensys Corporation is a small business IT Services firm headquartered in Loudoun County, Virginia. Our proven methodologies allow us to identify, attract and retain the highest quality of IT professionals. Agensys Corporation’s leadership team capitalizes in over 30 years of expertise in government and commercial sectors and is one of the fastest growing Services firms in the DC Metro Area. Our goal is to develop strong relationships with our partners to understand and exceed the needs of their unique environments.

Full-time