Contractor Special Access Program Security Officer (CSSO) / Site Security Manager

Modern Technology Solutions, Inc. (MTSI) is seeking an experienced Contractor Special Access Program Security Officer (CSSO) / Site Security Manager in Dayton, OH. The CPSO/CSSO/Site Security Manager is responsible for the full lifecycle management, execution, and oversight of all security disciplines supporting Special Access Programs (SAP), Sensitive Compartmented Information (SCI), and collateral classified activities. This role provides subject matter expertise across personnel, physical, information, and industrial security, ensuring full compliance with U.S. Government security directives, ICD standards, DoD manuals, and corporate policies. The position requires deep technical knowledge, strong leadership, exceptional attention to detail, and the ability to interface effectively with senior government, military, and contractor stakeholders to safeguard national security information.

Responsibilities Facility & Physical Security (SAPF/SCIF/Secure Areas) * Oversee all SAPF/SCIF construction, modifications, and accreditation activities in accordance withICD/ICS 705 Technical Specifications. * Develop Construction Security Plans (CSPs), perform site inspections, and coordinate withcontractors, architects, and engineers to ensure compliance throughout all construction phases. * Prepare accreditation documentation including Fixed Facility Checklists (FFCs) and security designpackages. * Manage daily facility operations including access control, intrusion detection systems, badging,keying, alarm monitoring, and escorting of uncleared personnel.

Program & Regulatory Security Compliance * Ensure full compliance with DoDM 5205.07 (SAP Security), DoDM 5105.21 (SCI), ICD/ICS 705, ICD704, DNI directives, 32 CFR Part 117 (NISPOM), SEAD policies, and all applicable government andcorporate security requirements. * Develop, implement, and maintain SAP, SCI, and collateral security policies, procedures, andstandard operating instructions. * Serve as the primary interface with all Cognizant Authorities including SAPCO, PSM, PSO, GAM,CAM, DCSA, and government customer security offices. * Lead and document annual self-inspections, audits, and corrective action plans; support externalagency inspections/assessments. * Develop, maintain, and submit for endorsement all program protection implementation plans on an annual basis to ensure compliance with DoDI 5000.83. Personnel Security (PERSEC) * Process and track Program Access Requests (PARs), security clearances, nominations, SCI/SAPindoctrinations, and debriefings. * Maintain JADE, DISS, NBIS, NISS, and other personnel security systems with accurate, timelyupdates. * Oversee visit authorizations, foreign travel reporting, SEAD 3 reporting, and personnel vettingrequirements. * Maintain and protect personnel security files and associated records. Classified Material, Document Control & Asset Management * Manage all classified material handling, receipt, storage, transmission, accountability, anddestruction. * Oversee GSA containers, locks, COMSEC (as assigned), and secure storage assets. * Conduct annual inventories and maintain accountability logs and databases. * Ensure compliance with DD Form 254 requirements and Security Classification Guides (SCGs). Security Operations, Incident Response & Investigations * Lead security incident inquiries, document findings, and coordinate with appropriate authorities onsuspected or confirmed security violations. * Support cybersecurity and ISSM teams to ensure synchronized protection of information systemswithin SAP/SCI environments. * Respond to data calls, manage government-furnished equipment (GFE), and maintain all programsecurity documentation. Security Education, Training & Awareness (SETA) * Assist FSO in developing and delivering initial, annual, and situational security training for SAP, SCI,and collateral personnel. * Conduct counterintelligence, OPSEC, and program-specific training as required. * Ensure training records and compliance documentation are maintained. Leadership, Communication & Cross-Functional Support * Provide expert guidance to employees, program managers, technical teams, and senior leadershipon all security matters. * Mentor junior security personnel and contribute to organizational security professionaldevelopment programs. * Collaborate across functional teams to ensure security requirements are understood andimplemented effectively. * Represent the security organization in high-level meetings, briefings, and customer engagements. * Support enterprise-wide initiatives led by the Chief Security Officer (CSO), Chief InformationSecurity Officer (CISO), and Director of Corporate Security (DCS). Required Qualifications * Bachelor's degree with a minimum 5 years of DoD, IC, SAP, or SCI program security experience withat least 3-5 years hands-on in SAP environments. * Active Top Secret clearance with SCI eligibility. * Strong working knowledge of SAP/SCI security policies (ICD 705, DoDM 5205.07, and DoDM5105.21) and related security management systems (JADE and DISS). * Proficiency with Microsoft Office, SharePoint, Adobe, and familiarity with security databases such asNBIS, NISS, and SIMS. * Proven ability to manage SAPF/SCIF accreditation, facility security requirements, and ICD 705processes. * Exceptional organization skills and a high degree of attention to detail are required. * Demonstrated integrity, sound judgment, and the ability to work independently in high securityenvironments. * Proven reliability, integrity, and trustworthiness. Desired Skills * Experience with SEAD 3/4, SIMS database, SWFT fingerprinting experience, Export Control/ITAR,NBIS/eApp workflows, and COMSEC. * Knowledge of 32 CFR 117 (NISPOM), industrial security, and government contract securityrequirements. * Experience with cross-functional collaboration (security, HR, finance, contracting, BD).
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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.