Information Systems Security Officer

Modern Technology Solutions, Inc. (MTSI) is hiringan Information Systems Security Officer to work in Springfield, VA or St. Louis, MO. Qualified candidates must be U.S. citizens with an active TS/SCI clearance and be eligible to obtain a CI Poly.

Responsibilities: *Support accreditation and cybersecurity for a Digital Engineering Ecosystem (DEE) supporting NGA from program stand-up. *Partners closely with platform engineering and the Enterprise Architect (who holds overall governance ownership for the program) to ensure the Cloud Native Platform, Data Layer, and Digital Engineering tool chain meet ATO and compliance requirements across TS/SCI and future SBU/Secret/CAP-SAP enclaves. *Builds Zero Trust Architecture (ZTA) hardening into the Cloud Native Platform as it is stood up, and coordinates directly with government security stakeholders on boundary definitions and compliance timelines as the team scales toward FedRAMP Azure Gov and NGA CORE onboarding. *Ensures completion of assigned technical and compliance tasks within estimated time frames and budget constraints while meeting established quality standards. *Support Authority to Operate (ATO) and compliance activities for the DEE across the Cloud Native Platform, Data Layer, and Digital Engineering tool chain. *Partner with platform engineering to validate Zero Trust Architecture (ZTA) implementation, including identity/access controls, secrets management, hardened container images, and Kubernetes policy enforcement. *Develop and maintain security documentation (e.g., System Security Plans, POA&Ms, risk assessments) required for accreditation of DEE components. *Support continuous monitoring, vulnerability management, and incident response coordination for the DEE environment. *Assess security implications of new tool onboarding and architecture decisions, feeding into the program's Architecture Decision Record (ADR) process. *Coordinate with government security stakeholders on accreditation timelines, boundary definitions, and compliance reviews as the platform scales toward external stakeholder integration. *Support secure onboarding processes for expanding user bases and, eventually, limited external participant access.

Required Qualifications: *Bachelor's degree in Cybersecurity, Computer Science, or a related field, or additional relevant experience in lieu of a degree. *Experience supporting NGA, DoD, or Intelligence Community accreditation efforts. *5+ years of information systems security / ISSO experience within IC or DoD environments. *Working knowledge of the Risk Management Framework (RMF) and experience supporting ATO packages for cloud-native or hybrid-cloud systems. *Familiarity with Zero Trust Architecture principles and associated technical controls (identity federation, secrets management, policy-as-code, hardened images). *DoD 8570/8140-compliant certification (e.g., Security+, CISSP, or equivalent) at time of hire or shortly thereafter.

Desired Qualifications: *Experience serving as an ISSO or ISSM of record for an accredited IC or DoD system. *Familiarity with Kubernetes security tooling (Kyverno, OPA/Gatekeeper) and supply-chain security practices. *Experience supporting multi-enclave environments (TS/SCI, Secret, SBU, CAP/SAP) and cross-domain solution considerations. *CISSP, CISM, or equivalent advanced cybersecurity certification.

Clearance Requirements: *Must be a U.S. citizen with an active TS/SCI clearance and have the ability to pass a CI polygraph within 30 days.


The pay range for this position is $130,000 to $190,000/year; however, base pay offered may vary depending on established government contract ranges, job-related knowledge, skills, and experience, and other factors. MTSI also offers a full range of medical, financial, and other benefits, dependent on the position offered. Base pay information is based on market location. Applications will be accepted on an ongoing basis. This posting will be renewed periodically until the position is filled.

#LI-RC2

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





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  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

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.