Multi-Level Security (MLS) Engineer

• Design and implement secure Multi-Level Security (MLS) architectures to support classified communications and data sharing.
• Develop solutions to enable secure interoperability between systems with different security classifications while maintaining information integrity and confidentiality.
• Research and integrate advanced technologies such as cross-domain solutions (CDS), automated security mechanisms, and encryption protocols into MLS environments.

• Implement access controls, data segregation mechanisms, and boundary protections that adhere to DoD cybersecurity frameworks (e.g., RMF, DISA STIGs, and NIST 800-53).
• Conduct continuous security assessments to identify vulnerabilities in MLS systems and design corrective solutions.
• Configure MLS solutions to prevent unauthorized disclosure, data compromise, or cross-platform security breaches.

• Ensure MLS systems comply with applicable DoD policies, FISMA, and federal guidelines for classified data protection and system interoperability.
• Collaborate with accreditation teams to achieve Authorization to Operate (ATO) for MLS systems across varying classification levels.
• Lead efforts to integrate government-mandated security standards such as Trusted Network Implementation (TNI) and Cybersecurity Maturity Model Certification (CMMC) requirements into MLS systems.

• Perform integration testing of MLS systems to validate security features, interoperability, and functionality.
• Coordinate with cross-functional teams to deploy MLS solutions into existing DoD platforms and networks.
• Monitor system performance post-implementation to ensure ongoing security compliance and operational efficiency.

• Work closely with DoD program managers, system architects, and cybersecurity experts to ensure MLS solutions meet mission-critical objectives.
• Provide technical guidance and training to DoD personnel and stakeholders responsible for MLS operations.
• Act as a liaison with external vendors and contractors for acquiring and integrating advanced MLS technologies.

• Create detailed technical documentation, including security architectures, system designs, and risk assessments for leadership and accreditation teams.
• Generate reports and dashboards outlining MLS system performance, vulnerabilities, and compliance metrics.
• Prepare presentations for leadership to demonstrate system capabilities, enhancements, and risk mitigation plans.

• Expertise in designing secure systems for multi-level classified environments, including cross-domain solutions.
• Strong understanding of DoD cybersecurity frameworks, RMF implementation, and cross-network communication architectures.
• Proficiency in implementing encryption protocols, access controls, and security automation technologies.
• Exceptional analytical and problem-solving abilities to resolve integration challenges and mitigate risks.
• Excellent communication skills for presenting technical solutions and collaborating with leadership and engineering teams.
• Adaptive and forward-thinking in response to emerging threats and evolving cybersecurity requirements.

• Security Clearance: Active Top Secret clearance with eligibility for Sensitive Compartmented Information (SCI).
• Education: Bachelor's Degree in Cybersecurity, Computer Science, Systems Engineering, or related field. Advanced degrees are preferred but equivalent military or technical experience may be considered.
• Experience:
• Minimum of 7 years of experience in cybersecurity, systems engineering, or secure network implementation in DoD environments.
• Proven experience with MLS implementations, cross-domain solutions, or similar secure information systems.
• Certifications:
• Preferred certifications include CISSP, GIAC Certified Multi-Level Security Engineer (GMSE), or equivalent cybersecurity certifications.
• Familiarity with tools like Guard solutions, Trusted Virtual Environments, or cross-domain security platforms is desirable.

• 
  
  
  
  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
  
• 
  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 tuition 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