Senior Information Security Officer (ISSO)

ManTech (


  full-time   employee   contract

United States

Solutions group. At ManTech International Corporation, you will help protect our national security while working on innovative projects that offer opportunities for advancement.

Currently, ManTech is seeking a motivated, career and customer oriented Senior Information Systems Security Officer (ISSO) to join our team in the Arlington, VA area to provide unparalleled support to our customer and to begin an exciting and rewarding career within ManTech.

Responsibilities included but not limited to:

  • As the ISSO you must have an understanding of the cybersecurity policies and procedures for DoD information systems. In this role, you will support classified programs and the Information System Security Manager (ISSM) by:
  • Ensuring all Information Systems (IS) are certified and accredited in compliance with the security requirements found in the NIST Risk Management Framework (RMF) 800-53 rev4
  • Ensuring each network or system is operated, maintained and disposed of in accordance with DoD security policies and practices and System Security Plan
  • Perform Cybersecurity technical vulnerability assessments using NESSUS scanning tool and performing system audits assisting systems administrators with resolving findings
  • Perform security technical settings compliance scan with SCAP Compliance Checker, document results and provide guidance on corrective actions
  • Develop, improve and implement auditing techniques and procedures as needed to meet systems cyber security compliance requirements.
  • Ensuring Audit Reviews and risk assessments are conducted periodically for each network or system to identify specific areas that require safeguards against deliberate or inadvertent unauthorized disclosure, modification, destruction of information, denial of service, and unauthorized use of IS. Ensure audit records are collected, reviewed, and documented
  • Initiate approval from ISSM for protective and corrective measures when vulnerabilities are discovered
  • Ensuring all security related incidents are documented and reported to the ISSM and Security Officer
  • Develop and maintain System Security Plans and related documentation for each supported network/system
  • Ensure configuration management procedures for software, hardware and firmware are maintained or developed as required
  • Ensure systems recovery processes are monitored and all security features reinstated
  • Perform systems security audit on a weekly basis to detect unauthorized activities and ensure systems maintain security compliance
  • Formally notify ISSM and DAA when systems are no longer used to process classified info
  • Notify ISSM when system changes occur that effect security compliance and authorization
  • Validate that system security is implemented during all phases of system lifecycle
  • Follow evaluation and authorization process for software, hardware and firmware updates before implementation

Position Requirements:

  • Must be knowledgeable of the Department of Defense (DoD) information system security compliance and implementation guidance. Specifically, NIST Risk Management Framework (RMF), DISA Security Technical Implementation Guides (STIG)
  • DoD 8140/8570 certification for IAM Level I (Security+CE, CAP, or GSLC)
  • Bachelors degree or equivalent experience with a minimum of 3 years? experience in Information System Security required and 2-5 years? technical support preferred.
  • Working knowledge of IT systems technical function, security policies, security safeguards and operations security measures. Specifically, Microsoft Windows 7/10 and Server 2012/2016 security technical configuration and event log auditing preferred.
  • Microsoft and VMware certifications a plus
  • US Driver?s license
  • 5% CONUS travel

Security Requirements:
U.S. Citizenship and an active DoD TS clearance based upon a SSBI completed within the last 6 years



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