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Information Systems Security Engineer; ISSE

Job in Sterling, Loudoun County, Virginia, 22170, USA
Listing for: CACI International Inc
Full Time position
Listed on 2026-09-12
Job specializations:
  • IT/Tech
    Cybersecurity, Information Security & Data Protection, Systems Engineer, Network Security
Salary/Wage Range or Industry Benchmark: 120800 - 265800 USD Yearly USD 120800.00 265800.00 YEAR
Job Description & How to Apply Below

Overview

Job Title:

Information Systems Security Engineer (ISSE)

Job Category:
Information Technology

Time Type:
Full time

Minimum Clearance Required to Start: TS/SCI with Polygraph

Employee Type:
Regular

Percentage of

Travel Required:

Up to 10%

Type of Travel:
Local

Responsibilities
  • Security Architecture Support:
    Contribute to the design and documentation of secure system architectures that meet mission requirements and security standards.
  • RMF Process Execution:
    Support Risk Management Framework (RMF) activities (Steps 1–6), assisting Information System Security Officers (ISSOs) in taking systems from initial categorization through Authorization to Operate (ATO).
  • Security Documentation:
    Develop and maintain Assessment & Authorization (A&A) documentation, including Systems Security Plans (SSP), Security Control Traceability Matrix (SCTM), and Body of Evidence (BoE).
  • Security Engineering:
    Design security architectures from requirements phase, defining system security requirements, and integrating capabilities including Zero Trust Architecture Software Defined Networking (SDN), macro/micro-segmentation, and software-defined perimeter controls to enable continuous verification and minimize network attack surfaces.
  • Security Evaluation:
    Participate in formal and informal design reviews to identify potential security weaknesses, deficiencies, and/or vulnerabilities in the design, evaluating designs for security impacts before implementation.
  • Compliance Implementation:
    Ensure hardware and software comply with Government Security Certification Officer (SCO) requirements and align with NIST SP 800-53, ICD 503, and CNSSI 1253 standards.
  • Continuous Monitoring:
    Implement and maintain continuous monitoring (Con Mon) activities using automated tools to track system health and compliance status.
  • Vulnerability Management:
    Perform risk assessments and security audits; use tools like Nessus (ACAS) and SCAP to identify, track, and remediate vulnerabilities.
  • Incident Response Support:
    Assist with incident response activities and participate in on-call rotation for security incidents.
  • Network Integration Support:
    Provide support for network mapping activities and system interdependencies to ensure secure data flow across the enterprise.
Qualifications Required
  • Education:

    Bachelor's degree in Computer Science, Cybersecurity, Information Technology, or a related field, or equivalent experience.
  • Experience:

    10+ years of related work experience with demonstrated ISSE/ISSO responsibilities, preferably within the Intelligence Community or DoD environment.
  • Clearance:
    Current TS/SCI with Polygraph (Required).
  • Certifications:

    Must meet DoD 8570/8140 IASAE Level II requirements (e.g., CISSP, CASP+, or CSSLP).
  • Compliance Knowledge:
    Working knowledge of NIST 800-53 security controls and experience with RMF processes.
  • Technical

    Skills:

    Understanding of network protocols (TCP/IP, DNS, HTTP) and security concepts including VPNs, IDS/IPS, and DMZ configurations.
  • Tooling

    Experience:

    Experience with A&A tracking tools such as Xacta or eMASS.
  • Communication:
    Strong analytical, problem-solving, and communication skills with the ability to document technical security findings clearly.
Desired
  • Security

    Certifications:

    CISM, Security+, CCSP, or GSLC.
  • Networking

    Certifications:

    CCNP Enterprise with the SD WAN, CCIE Security, JNCIS-ENT, JNCIP-ENT, or JNCIE-ENT
  • Platform

    Experience:

    Exposure to major firewall platforms (e.g., Palo Alto, Cisco ASA, Fortinet).
  • Tools

    Experience:

    Cisco Identity Services Engine (ISE), Juniper Contrail, Cisco Dev Net, Juniper Automation, or other networking orchestration tool.
  • Scripting:
    Basic proficiency in Ansible, Python, Power Shell, or Bash for task automation.
  • SIEM Experience

This position is contingent on funding and may not be filled…

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