Information Systems Security Officer; ISSO

Essential Job Functions

• Security Policy Implementation
  :
  Develop, implement, and enforce security policies, standards, and procedures to ensure the protection of information systems.
• Configuration Management
  :
  Ensure that all information systems are configured securely according to organizational policies and best practices.
• System Patching
  :
  Perform system patching in response to IAVAs and other security findings and requirements.
• Risk Management
  :
  Conduct risk assessments to identify and mitigate potential security threats. Assess the impact of changes in the IT environment and update the risk management framework accordingly.
• Security Compliance
  :
  Ensure that information systems comply with relevant government and industry standards, such as NIST, FISMA, and DoD regulations. Prepare and maintain documentation that demonstrates compliance.
• Continuous Monitoring
  :
  Implement continuous monitoring processes to detect and respond to security vulnerabilities and threats. Utilize tools like SIEM (Security Information and Event Management) to monitor system activities.
• Security Audits
  :
  Conduct regular security audits and assessments to evaluate the effectiveness of security measures and identify areas for improvement.
• Collaboration
  :
  Work closely with other IT and security professionals to ensure a coordinated approach to cybersecurity. Liaise with external stakeholders, such as auditors and regulatory bodies, as needed.
• Documentation
  :
  Maintain comprehensive documentation of security policies, procedures, and measures taken to secure information systems. Prepare reports for management on security status and incidents.
• Security Enhancements
  :
  Recommend and implement security enhancements to improve the overall security posture of the organization. Stay updated with the latest security trends and technologies.

• 2-5 years' experience in role
• Proficiency in using security tools and technologies, such as firewalls, intrusion detection/prevention systems, SIEM, and endpoint protection.
• Knowledge of network security, application security, and endpoint security principles.
• Understanding of operating systems (Windows, Linux, etc.) and their security configurations.
• Familiarity with cloud security best practices
• Familiarity with RMF process
• Experience with Spunk or other similar applications
• Experience with security compliance and regulatory requirements.
• Strong analytical and problem‑solving abilities.
• Capability to analyze complex security issues and develop practical solutions.
• Excellent written and verbal communication skills.
• Ability to effectively communicate technical information to non-technical stakeholders.

• Bachelor's degree in Computer Science, Information Technology, or related field

• COMPTIA Security+ / CISSP
• DESIRED AWS certification (e.g., AWS Solutions Architect Associate or Professional)

• TS/SCI clearance and CI Polygraph
• U.S. Citizenship is required for this position.

• Chantilly VA (in person, full time)

For additional company information, please visit:

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

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.

We have grown every year since our founding in 1993.

• Starting PTO accrual of 20 days PTO/year + 10 holidays/year
• Flexible schedules
• 6% 401(k) 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

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

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…