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Information System Security Officer (ISSO)

Modern Technology Solutions, Inc.
401(k)
United States, D.C., Washington
1300 Pennsylvania Avenue (Show on map)
May 13, 2026
MTSI is seeking a Information System Security Officer (ISSO)who responsible for maintaining the appropriate operational security posture for assigned information systems and ensuring full compliance with Department of Defense (DoD) and Special Access Program (SAP) security requirements. The ISSO will oversee, implement, and manage the system's security controls throughout its life-cycle.
Your essential job functions will include but may not be limited to:
  • Assist the ISSM in meeting their duties and responsibilities.
  • Ensure systems are operated, maintained, and disposed of in accordance with security policies and procedures as outlined in the security authorization package;
  • Attend required technical and security training (e.g., operating system, networking, security management) relative to assigned duties.
  • Ensure all users have the requisite security clearances, authorization, need-to-know, and are aware of their security responsibilities before granting access to the IS.
  • Report all security-related incidents to the ISSM;
  • Conduct periodic reviews of information systems to ensure compliance with the security authorization package.
  • Coordinate any changes or modifications to hardware, software, or firmware of a system with the ISSM and AO/DAO prior to the change.
  • Monitor system recovery processes to ensure security features and procedures are properly restored and functioning correctly.
  • Ensure all IS security-related documentation is current and accessible to properly authorized individuals.
  • Ensure audit records are collected, reviewed, and documented (to include any anomalies).
Required:
  • 10+ years related experience, especially in developing RMF packages or bodies of evidence.
  • 2+ years SAP experience required.
  • Prior performance in roles such as System, Network Administrator or ISSO.
Education Requirements:
  • Bachelor's Degree in a related discipline.
Clearance Requirements:
  • Current/active Top Secret/SCI; Current or recent DoD SAP access
  • Subject to a Counterintelligence (CI) polygraph
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  • Interesting Work:



    Our co-workers support some of the most important and critical programs to our national defense and security.






  • Values:



    Our first core value is that employees come first. We challenge our co-workers to provide the highest level of support and service, and reward them with some of the best benefits in the industry.






  • 100% Employee Owned:



    We have a stake in each other's success, and the success of our customers. It's also nice to know what's going on across the company; we have company wide town-hall meetings three times a year.






  • Great Benefits - Most Full-Time Staff Are Eligible for:





    • Starting PTO accrual of 20 days PTO/year + 10 holidays/year


    • Flexible schedules


    • 6% 401k match with immediate vesting up to $9k annually


    • Semi-annual bonus eligibility (July and December)


    • Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account


    • Up to $10,000 in annual educational reimbursement


    • Other company funded benefits, like life and disability insurance


    • Optional zero deductible Blue Cross/Blue Shield health insurance plan







  • Track Record of Success:



    We have grown every year since our founding in 1993.




Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned engineering services and solutions company that provides high-demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance

MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide.

For more information about MTSI, please visit www.mtsi-va.com

MTSI embraces nine core values including our first core value of Employees come first. Consistent with our Core Values, we are committed to Equal Opportunity, making decisions without regard to race, color, religion, sex, national origin, age, military/veteran status, disability, or any other characteristics protected by applicable law. MTSI is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants and employees with physical and/or mental disabilities.


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