Principal Security Specialist

US - VA – Falls Church


In this position, the candidate will support the Chief Information Security Officer (CISO) and appointed representatives with identifying accredited system security controls and boundaries, establishing procedures and resources for verifying their effectiveness and scheduling the verification activities at the Department of Homeland Security (DHS). In the execution phase, responsibilities will include verifying that the system security controls are implemented correctly and are producing the desired outcome.    

Duties include but are not limited to::

  • Perform Security Assessments and Technical Security Reviews (TSR) for classified and unclassified systems;
  • Ensure adherence to the DHS/CBP Systems Engineering Lifecycle (SELC) and Change Management (CM) principles;
  • Develop and update testing procedures, Rules of Engagement (RoE) and security assessment scripts;
  • Select and configure vulnerability assessment tools;
  • Identify security risks, threats and vulnerabilities;
  • Use NIST SP800-53 (Rev 3 and 4) and DHS 4300A/B controls for testing the security controls within C&A;
  • Review security controls using manual processes and automated tools;
  • Analyze scan results to validate findings and identify false positives
  • Review Security Plans;
  • Perform Risk Analysis;
  • Work with ISSOs and System Owners on the assessment of  systems under test;
  • Develop Security Assessment Reports (SAR)



  • Eligible for up to a Top Secret clearance
  • B.S. from an accredited institution in a Technical or Engineering related discipline.  Relevant experience can be substituted in lieu of a degree.
  • 3+ years of experience in IT Security with relevant security assessment planning and execution.
  • Knowledge of OMB, DHS 4300A/B, FIPS,  NIST SP-800 series standards
  • Excellent written, verbal and interpersonal communication skills
  • Ability to travel 10-25% of the time (Local and CONUS)


·         Active DHS clearance

·         DHS Agency or other Component experience

·         CISSP, CISA or GIAC Certification

·         Automated assessment tools  experience (Nessus, AppDetective, WebInspect, Core Impact, etc…)

  • Telos Xacta IA Manager experience

Company URL:

Company Profile:

A woman-owned, SBA certified 8(a) Information Technology solution provider with certified, experienced and cleared personnel who are eager to assist and make a difference in their community and business environment.

At Global Network Systems our clients and employees have a clear understanding of our intention for a long-term relationship with their interests in mind. We believe in providing exceptional services and focusing on our tasks until completion.

Services cover the full range of information technologies with special emphasis on providing Information Assurance and Network-based computing solutions. We are a leading provider of Information and Communication Technology solutions and services to the E-business world; building futures for our clients, and our people.

If you're self-motivated and have a solid track record of success, then you should consider joining one of the fastest growing companies in the Information Technology field. To apply, e-mail your cover letter, resume to or contact us directly at 301.921.4467 #225.

An equal opportunity employer.


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